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30 Oct 06:52

[ASAP] Photochemical Synthesis of 7,12-Dioxa[8]helicene and Density Functional Theory Studies: Unravelling the One-Way Valve System Involving Steric Crowding and Aromatic Stability

by Sushil Khot, Vaibhav Khose, Arati Gavali, Mohammed Hasan, Purav Badani, and Anil Karnik

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The Journal of Organic Chemistry
DOI: 10.1021/acs.joc.4c01971
24 Oct 07:01

Morphology Optimization by Non‐Halogenated and Twisted Volatile Solid Additive for High‐Efficiency Organic Solar Cells

by Linze Wu, Maojin Yun, Jianqiang Qin, Sihao Huang, Zeping Ou, Qian Li, Xiaowu Wang, Wenqian Yuan, Li Dong, Xi Cheng, Yingguo Yang, Yujie Zheng, Kuan Sun, Zeyu Zhang, Zhiping Hu, Zhengzheng Liu, Yuxin Leng, Juan Du
Morphology Optimization by Non-Halogenated and Twisted Volatile Solid Additive for High-Efficiency Organic Solar Cells

In this work, a novel halogen-free and twisted volatile solid additive 1,4-diphenoxybenzene (DPB) has been employed to control the morphology of the active layer in organic solar cells (OSCs). As a result, a champion power conversion efficiency (PCE) of 19.04% has been obtained in D18-Cl:N3 binary OSCs, which is the highest value for the reported D18-Cl:N3 OSCs to date.


Abstract

Recently, volatile solid additives have attracted tremendous interest in the field of organic solar cells (OSCs), which can effectively improve device efficiency without sacrificing the reproducibility and stability of the device. However, the structure of reported solid additives is onefold and its working mechanism needs to be further investigated. Herein, a novel non-halogenated and twisted solid additive 1,4-diphenoxybenzene (DPB) is employed to optimize the morphology of the active layer in OSCs. The properties of additive DPB, morphology of active layer, and carrier dynamics behaviors have been systematically investigated through theoretical calculations, in situ and ex situ spectroscopy, grazing-incidence wide-angle X-ray scattering (GIWAXS), and grazing-incidence small-angle X-ray scattering (GISAXS) measurement, as well as ultrafast spectroscopy technology. The results reveal that the twisted additive DPB selectively interacts with acceptor Y6, and thus forms optimized morphology of active layer with increased molecular crystallinity, tight molecular packing, and favorable phase separation. As a result, the optimized devices deliver a remarkable power conversion efficiency (PCE) of 19.04%, which is the highest value for the D18-Cl:N3 system to date. These results demonstrate that non-halogenated and twisted solid additive DPB has broad prospects in the preparation of highly efficient OSCs, providing theoretical and experimental guidance for the development of high-performance solid additives.

24 Oct 06:56

[ASAP] Plasma Sputtering Halide Perovskite for Photovoltaic Applications

by Xuyu Ma, Haofeng Zheng, Yanlong Wang, Yanan Liu, Qi Liu, Jin Xiao, Shuai Pang, Zhen Dong, Yueting Zhang, Kai Yan, Dechun Zou, Jing Hu, and Shaocong Hou

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ACS Materials Letters
DOI: 10.1021/acsmaterialslett.4c01309
23 Oct 05:31

A New Organic Laser Material Design Toward Ultra‐Low Amplified Spontaneous Red Emission and Ultra‐Bright Electroluminescence

by Nicholle R. Wallwork, Atul Shukla, Ras Baizureen Roseli, Ilene Allison, Sarah K. M. McGregor, Max Coles, Innes Gale, Vijay P. Rahane, Volter Entoma, Evan G. Moore, Elizabeth H. Krenske, Ebinazar B. Namdas, Shih‐Chun Lo
A New Organic Laser Material Design Toward Ultra-Low Amplified Spontaneous Red Emission and Ultra-Bright Electroluminescence

New red-emitting laser Cibalackrot dimer enables a 250% increase in oscillator strengths and stimulated emission cross-sections to lead to a low solid-state E th of 4.5 ± 0.3 µJ cm−2 at λ ASE = 655 nm. OLEDs with the dimer show minimal efficiency roll-off in DC mode, reaching current densities of 90 A m−2 and brightness levels of ≈710 000 cd m−2 in pulsed operation.


Abstract

Significant efforts are dedicated to developing new classes of organic semiconductor materials to achieve electrically pumped lasing. However, further advancements are necessary to understand the relationship between the structure and property for the creation of innovative laser materials with high stability, low triplet yield, ultra-low lasing threshold, and low-efficiency roll-off at ultra-bright electroluminescence. Here, a new design principle is validated for organic semiconductor laser materials, demonstrating simultaneous enhancement in the key figures of merit of low amplified spontaneous emission thresholds (E th), efficient electroluminescence, and low triplet yields. By applying the Einstein stimulated emission rate equation and Strickler–Berg approximation, Two red-emitting laser dimers of Cibalackrot with different linkers are constructed, leading to giant enhancement (≈250%) in oscillator strengths, and stimulated emission cross-sections. When blended in poly(9,9-dioctylfluorene-alt-benzothiadiazole), the new dimers achieve an ultra-low E th (4.5 ± 0.3 µJ cm−2) in the deep red region (λ ASE = 655 nm), among the lowest reported for deep-red emitters. Organic light-emitting diodes (OLEDs) utilizing the dimer blend exhibit low-efficiency roll-off under DC mode. Under pulse operation, the OLEDs achieve high current densities (90 A m−2) and ultrahigh brightness (≈710 000 cd m−2). These findings highlight the dimerization design as an excellent platform to advance organic semiconductor laser materials.

22 Oct 03:15

Tailoring Perovskite/C60 Interface by Reactive Passivators for Stable Tandem Solar Cells

by Fengtao Pei, Qianqian Wang, Zejun Wei, Xinmeng Zhuang, Xianghan Cheng, Kailin Li, Yuanyuan Cui, Lan Wang, Zijian Huang, Zhongyang Zhang, Tailai Xu, Ying Zhang, Teng Cheng, Jiahong Tang, Guilin Liu, Cheng Zhu, Yuxuan Huo, Siqi Li, Cuigu Wu, Xueyun Wang, Huanping Zhou, Yihua Chen, Qi Chen
Tailoring Perovskite/C60 Interface by Reactive Passivators for Stable Tandem Solar Cells

This work introduces a reactive passivator at the perovskite/C60 interface to suppress non-radiative recombination and enhance charge carrier transport across the interface. The tailored perovskite/C60 interface improves the performance of perovskite/silicon tandem solar cells, resulting in a stabilized efficiency of 30.59%. The unencapsulated device retains 94% of its initial efficiency over 200 h under continuous 1-sun full spectrum illumination.


Abstract

Integrating perovskite solar cells with crystalline silicon bottom cells in a monolithic two-terminal tandem configuration enables power conversion efficiency (PCE) surpassing the theoretical limits of single-junction cells. However, wide bandgap (WBG) perovskite films face challenges related to phase stability and open circuit voltage (V OC) deficit, particularly due to severe non-radiative recombination at the perovskite/C60 interface. Here, the interfacial defects are passivated by incorporating a reactive passivator that reacts with lead halides to form low-dimensional phases. The target product obtained by optimizing the reaction temperature not only suppresses recombination across the interface, but also facilitates the transfer of charge carriers. More importantly, this product can suppress phase segregation of WBG perovskite films under exposure to light illumination and moisture. This strategy enables a high V OC of 1.25 V for WBG perovskite device based on polymer hole transport layer and a certified stabilized PCE of 30.52% for a monolithic perovskite/silicon tandem solar cell. The unencapsulated tandem device retains 94% of its initial PCE over 200 h under continuous 1-sun full spectrum illumination in air, demonstrating the improved phase stability.

22 Oct 03:15

Boosting Efficiency to 22.73%: Unraveling the Role of Solvent Environment in Low‐Dimensional Perovskites Through Competitive Bonding Interactions

by Kaiqin Xu, Zhi Xing, Dengxue Li, Canqiang Du, Yang Gao, Xiaotian Hu, Ting Hu, Yiwang Chen
Boosting Efficiency to 22.73%: Unraveling the Role of Solvent Environment in Low-Dimensional Perovskites Through Competitive Bonding Interactions

Four solvent additives with varying basicity are introduced to instigate a tug-of-war among bonding interactions, thereby exploring the systematic effect of the solvent environment on the growth of quantum wells and the photoelectric properties of the resultant low-dimensional perovskite films. A record-high efficiency of 22.73% is achieved for GA(MA)nPbnI3n+1 (n = 5) based solar cells with p-i-n structure.


Abstract

It is reported that the solvent environment exerts a significant influence on the property of perovskite precursor solution and resultant film, which is more pronounced in more complex low-dimensional perovskites. Four solvent additives with varying basicity are introduced to instigate a tug-of-war among bonding interactions, thereby exploring the systematic effect of the solvent environment on the growth of quantum wells and the photoelectric properties of the resultant low-dimensional perovskite films. A governing principle that diverges significantly from those previously documented for three-dimensional perovskites is elucidated in low-dimensional perovskites. When coordination interactions predominate in the solvent environment, the emergence of a two-dimensional GA2PbI4 transitional phase is fostered to facilitate subsequent transformation into the desirable ACI phase, and the perovskite crystallization kinetics is retarded to improve the film quality. Hence, the highest power conversion efficiency (PCE) of 22.73% is obtained for GA(MA)nPbnI3n+1 (n = 5) based solar cells with a p-i-n structure. The PCE achieved in this work is a record among the reported low-dimensional perovskite solar cells.

22 Oct 03:11

Adhesively Bridging SAM Molecules and Perovskites for Highly Efficient Photovoltaics

by Xin Chen, Chun‐Hao Chen, Zhen Huang Su, Jing Chen, Kai‐Li Wang, Yu Xia, Namatullah Nizamani, Lei Huang, Run‐Jun Jin, Yu‐Han Li, Xing Yu Gao, Zhao‐Kui Wang
Adhesively Bridging SAM Molecules and Perovskites for Highly Efficient Photovoltaics

A conductive adhesive, named polyaniline (PANI) with strong adhesion and high conductivity, is used to construct an adhesive bridge between SAM and perovskite layers. The nitrogen-containing groups of PANI are harnessed to passivate the buried interface defects, and the π–π interactions between PANI and SAM molecules facilitate the charge transport to optimize the buried interface contact. The strategy enables the inverted perovskite solar cells an impressive power conversion efficiency of 25.59%.


Abstract

The effective utilization of self-assembled monolayers (SAMs) has indeed resulted in significant improvement in the power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs). However, the poor interface contact between self-assembled monolayer (SAM) and perovskite layers limits the further improvement of inverted PSCs. Herein, polyaniline is employed as a conductive adhesive, enabling interaction with the perovskite and simultaneous coupling with the SAM, to optimize the buried interface contact. Furthermore, the adhesive strategy is validated to alleviate residual tensile strain at the buried interface using the non-destructive back grazing-incidence wide-angle X-ray scattering (BGIWAXS) technique. As a result, the optimized inverted PSCs achieve a champion PCE of 25.59% with impressive stability by retaining 97.3% of its initial efficiency after 1200 h under ambient conditions and light-emitting diode illumination. The findings provide a facial adhesive bridging strategy to play more impressive functions in the SAM-based inverted PSCs.

22 Oct 03:11

Silicone‐Assisted Autonomous Growth of Strainless Perovskite Single Crystals for Integrated Low‐Dose X‐Ray Imaging Arrays

by Lixiang Wang, Yuchao Yan, Mingxuan Bu, Jing Wang, Liqi Li, Yuyang Li, Hui Liu, Hui Zhang, Xiaodong Pi, Deren Yang, Yanjun Fang
Silicone-Assisted Autonomous Growth of Strainless Perovskite Single Crystals for Integrated Low-Dose X-Ray Imaging Arrays

High-quality perovskite single crystals (SCs) are grown with soft silicone containers to mitigate thermal and interfacial stress, resulting in strainless SCs with a low defect density of 2.15 × 108 cm−3 and an optimal X-ray diffraction rocking curve width of 19.04 arcsec. Integrated pixelated arrays based on these SCs demonstrate both single-photon detection and low-dose X-ray imaging abilities.


Abstract

Metal halide perovskite single crystals (SCs) have emerged as promising candidates for high-performance X-ray detectors. However, mitigating the adverse effects of thermal and interfacial stress during SC growth remains a significant challenge. In this study, the solution growth of high-quality perovskite SCs using silicone containers through a constant-temperature autonomous crystallization process is presented. Unlike conventional hard glass vessels, soft silicone containers significantly reduce the negative impact of thermal and interfacial stress on SC growth. Additionally, the microporous nature of silicone containers permits solvent leakage, facilitating autonomous SC growth at constant temperatures. The hydrophilic surface of the silicone further increases the interfacial nucleation barrier and enhances mass transfer, promoting the rapid growth of larger SCs. This multifaceted approach results in MAPbBr3 SCs with an exceptionally low defect density of 2.15×108 cm−3 and an optimal full-width-at-half-maximum of X-ray diffraction rocking curves at 19.04 arcsec, consequently leading to an ultralow X-ray detection limit of 850 pGyair s−1 for the X-ray detectors. The superior quality of the SCs, combined with a low-temperature flip-chip bonding process, enables the integration of the crystals with pixelated arrays on a printed circuit board for both single-photon detection and low-dose X-ray imaging.

22 Oct 03:07

[ASAP] Reengineering of Donor–Acceptor–Donor Structured Near-Infrared II Aggregation-Induced Emission Luminogens for Starving-Photothermal Antitumor and Inhibition of Lung Metastasis

by Mingwang Yang, Suyin Wang, Xinwen Ou, Junjun Ni, Shinsuke Segawa, Jianwei Sun, Feng Xu, Ryan T. K. Kwok, Jing Zhao, Jacky W. Y. Lam, Guorui Jin, and Ben Zhong Tang

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ACS Nano
DOI: 10.1021/acsnano.4c11527
22 Oct 03:06

[ASAP] In Situ Crystal Growth and Fusing-Confined Engineering of Quasi-Monocrystalline Perovskite Thick Junctions for X-ray Detection and Imaging

by Jiali Peng, Jingao Yang, Zhenglin Jia, Minshu Zhang, Ken Qin, Guan-Hua Dun, Jiahe Zhang, Xiaolong Zhang, Xin Li, Peigen Zhang, Ruolong Zhou, Pengwen Guo, Xiangshun Geng, Sining Pan, Yi Yang, Dan Xie, Qianqian Lin, and Tian-Ling Ren

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ACS Nano
DOI: 10.1021/acsnano.4c09823
22 Oct 03:00

[ASAP] Nitrogen-Bridged Fused-Ring Nonacyclic and Heptacyclic A–D–A Acceptors for Organic Photovoltaics

by Yung-Jing Xue, Yu-Chieh Wang, Han-Cheng Lu, Chia-Lin Tsai, Chia-Fang Lu, Li-Lun Yeh, and Yen-Ju Cheng

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.4c11466
22 Oct 02:57

[ASAP] Site Effect of Electron Acceptors on Ultralong Organic Room-Temperature Phosphorescence

by Xingda Zhang, Yiran Liu, Lijuan Bu, Jingjuan Bai, Zewei Li, Zhimin Ma, Mingxing Chen, Yan Guan, and Zhiyong Ma

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.4c16078
22 Oct 02:57

[ASAP] In Situ IR Spectroscopy Studies of Atomic Layer-Deposited SnO2 on Fullerenes for Perovskite Photovoltaics

by Andrea E. A. Bracesco, Joost van Himste, Wilhelmus M. M. Kessels, Valerio Zardetto, and Mariadriana Creatore

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.4c09630
22 Oct 02:55

[ASAP] PEDOT:PSS-Free Quantum-Dot Light-Emitting Diode with Enhanced Efficiency and Stability

by Yuanyuan Wang, Dawei Yang, and Heng Zhang

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.4c13899
22 Oct 02:54

[ASAP] Charge Carrier Dynamics at the Perovskite Interface with Self-Assembled Monolayers

by Ernestas Kasparavičius, Marius Franckevičius, Simonas Driukas, and Vidmantas Gulbinas

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.4c10223
22 Oct 02:51

Polymer Acceptor Copolymerized with Luminescent Unit for High‐Performance All‐Polymer Solar Cells with Low Non‐radiative Energy Loss

by Yiyang Pan, Lingzhi Guo, Min Hun Jee, Guangkuo Dai, Zhongwei Ge, Junjie Zhang, Xiaopeng Duan, Jiali Song, Xiaoming Li, Han Young Woo, Yanming Sun
Polymer Acceptor Copolymerized with Luminescent Unit for High-Performance All-Polymer Solar Cells with Low Non-radiative Energy Loss

The polymer acceptors copolymerized with luminescent units are designed and synthesized. Introducing light emitter into polymer acceptors can enhance the electroluminescence performance of all-polymer solar cells, achieving reduced non-radiative energy loss. When blended with PM6, the optimized device exhibited high power conversion efficiency with high open-circuit voltage.


Abstract

Reduction of non-radiative energy loss (ΔE nr) in all-polymer solar cells (all-PSCs) is crucially important for achieving high power conversion efficiencies (PCEs). Herein, an efficient strategy is reported to reduce the ΔE nr by introducing luminescent unit into the backbone of polymer acceptors. Compared to the device based on PM6:PYDT, the ΔE nr in all-PSC based on PM6:PYDT-CzP-9 has decreased from 0.188 to 0.183 eV. This reduction is attributed to the improvement in electroluminescence external quantum efficiency (EQEEL). The PM6:PYDT-CzP-9 device has shown an 18% increase in EQEEL compared to the device based on PM6:PYDT (8.4 × 10−4 vs 7.1 × 10−4), demonstrating that the incorporation of luminescent unit in polymer acceptors is highly effective in enhancing the electroluminescence performance of all-PSCs. As a result, the PM6:PYDT-CzP-9 device yielded a high V OC of 0.967 V, without the sacrifice of short-circuit current density (23.42 mA cm−2) and fill factor (77.5%), leading to a high PCE of 17.55%.

22 Oct 02:35

Peripheral Substitution Engineering of MR‐TADF Emitters Embedded With B‒N Covalent Bond Towards Efficient BT.2020 Blue Electroluminescence

by Danrui Wan, Jianping Zhou, Ying Yang, Guoyun Meng, Dongdong Zhang, Lian Duan, Junqiao Ding
Peripheral Substitution Engineering of MR-TADF Emitters Embedded With B‒N Covalent Bond Towards Efficient BT.2020 Blue Electroluminescence

Based on a novel B–N embedded framework, a peripheral substitution engineering has been proposed to afford ultrapure blue MR-TADF emitters, revealing a record-high EQE of 20.3%, a narrow FWHM of 20 nm and CIE coordinates of (0.152, 0.046) that align with the BT.2020 blue standard.


Abstract

Compared with the classical boron/nitrogen (B/N) doped ones, multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters embedded with B–N covalent bond behave a significantly blue-shifted narrowband TADF, and thus show a greater potential in ultrapure blue organic light-emitting diodes (OLEDs). As a proof of concept, herein a peripheral substitution engineering is demonstrated based on such a B‒N embedded parent core. The simple approach is found to ensure easy synthesis via a one-pot lithium-free borylation-annulation, manipulate the excited states through different electronic coupling between core and substituent, and introduce the steric hindrance to minimize the unwanted spectral broadening. Impressively, ultrapure blue OLEDs are realized to give a high external quantum efficiency of 20.3% together with Commission Internationale de l’Éclairage coordinates of (0.152, 0.046). The performance is well competent with those of B/N doped MR-TADF emitters, clearly highlighting that the B‒N embedded framework is a novel promising paradigm towards efficient BT.2020 blue standard.

22 Oct 02:32

Exciton binding energies and polaron interplay in the optically excited state of organic–inorganic lead halide perovskites

Mater. Adv., 2024, Advance Article
DOI: 10.1039/D4MA00454J, Review Article
Open Access Open Access
Creative Commons Licence&nbsp This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Zeeshan Muhammad, Arooj Rashid
Excitons and polarons are formed in organic–inorganic lead halide perovskites upon photoexcitation, accounting for most of their photovoltaic properties.
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22 Oct 02:30

Advances in sodium-ion battery cathode materials: exploring chemistry, reaction mechanisms, and prospects for next-generation energy storage systems

J. Mater. Chem. A, 2024, 12,30971-31003
DOI: 10.1039/D4TA03748K, Review Article
Han Zhang, Liguang Wang, Pengjian Zuo
Promising cathode materials and advanced operando and in situ measurements to unveil their electrochemical behavior for sodium-ion batteries are comprehensively summarized.
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21 Oct 05:34

Ionized Phenanthroline Derivatives Suppressing Interface Chemical Interactions with Active Layer for High‐efficiency Organic Solar Cells with Exceptional Device Stability

by Lin Hu, Jianwei Quan, Jingbai Li, Zhendong Li, Senmei Lan, Manjiang Yu, Xunfan Liao, Yingzhi Jin, Xinxing Yin, Jiaxing Song, Dan Zhou, Zaifang Li, Yiwang Chen
Ionized Phenanthroline Derivatives Suppressing Interface Chemical Interactions with Active Layer for High-efficiency Organic Solar Cells with Exceptional Device Stability

A novel alcohol-soluble phenanthroline derivative, tbp-PhenBr, is innovatively designed and synthesized as cathode interlayer material, which can effectively suppress interface chemical interactions with the non-fullerene active layer for high-efficiency organic solar cells with exceptional device stability.


Abstract

The contact interface between the charge transport interlayer and the active layer is crucial for the non-fullerene organic solar cells (NF OSCs) to achieve high efficiency and long-term stability. In this study, two novel phenanthroline (Phen) derivatives, tbp-Phen and tbp-PhenBr, are developed as efficient cathode interfacial materials (CIMs). The larger steric hindrance substituents and the ionization of nitrogen atoms on the Phen framework jointly enable the tbp-PhenBr CIM with a stable film morphology and immensely suppress the detrimental interface chemical interactions with the NF active layer. Consequently, tbp-PhenBr-based OSC achieves a higher efficiency (PCE = 16.34%) than bathocuproine (BCP)-based control device (PCE = 13.70%) using PM6:Y6 as the active layer. More importantly, the tbp-PhenBr-based device maintains 80% of its initial efficiency (T 80) for 3264 h in dark conditions and 220 h after being heated at 85 °C, significantly outperforming the BCP-based device. The tbp-PhenBr CIM also shows broad applicability across various binary and ternary active layer systems, affording a notable PCE of 19.49%. Additionally, the tbp-PhenBr CIM can be processed via a thermal evaporation technique and the prepared devices exhibit high reproducibility. This work provides innovative insights into the molecular design of the CIMs for stable and efficient NF OSCs.

21 Oct 05:33

Efficient Electroluminescence from Organic Fluorophore‐Containing Perovskite Films

by Toshinori Matsushima, Chuanjiang Qin, Teng Teng, Narayanaswamy Kamatham, Lydia Sosa Vargas, David Kreher, Benoit Heinrich, Tomohiro Ishii, Shinobu Terakawa, Matthew R. Leyden, Atula S. D. Sandanayaka, Fatima Bencheikh, Kiyoshi Miyata, Ken Onda, Yoshihiko Kanemitsu, Fabrice Mathevet, Chihaya Adachi
Efficient Electroluminescence from Organic Fluorophore-Containing Perovskite Films

In light-emitting diodes using an organic fluorophore-containing 2D perovskite as the emitter, carrier transport, and exciton formation take place in the metal halide sheets. Then, the bright triplet excitons formed in the metal halide sheets are transferred to singlet states of the organic fluorophores. With these processes, efficient electroluminescence is observed from the organic fluorophores inside the perovskite.


Abstract

Two-dimensional perovskites containing an organic fluorophore can be a unique emitter for light-emitting diodes (LEDs). However, external quantum efficiencies (EQEs) of fluorophore-containing perovskite LEDs reported thus far are still very low. In this study, these are able to boost the EQE to ≈10% by choosing an organic fluorophore with appropriate energy levels for the perovskite structure organization. In the fluorophore-containing perovskite LEDs, carrier transport and exciton formation take place in the perovskite's metal halide framework, thereby avoiding the direct formation of nonradiative triplet excitons on the organic fluorophores. Subsequently, the bright triplet excitons formed in the metal halide framework are transferred to form the radiative singlet states of the organic fluorophores, leading to efficient electroluminescence (EL) from the organic fluorophores regularly dispersed inside the perovskite structure. Unexpectedly higher light-outcoupling efficiency, which is caused by the light scattering in the polycrystalline perovskite layer, will be another reason for efficient EL. These findings will contribute toward the fabrication of LED-based products with high performance at a low cost.

21 Oct 03:16

[ASAP] LiF in Inverted Perovskite Solar Cells: Dipole or Doping?

by Seung-Gu Choi, Sung-Kwang Jung, Joo-Hong Lee, Jae-Hwan Kim, Wenting Zheng, and Jin-Wook Lee

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ACS Energy Letters
DOI: 10.1021/acsenergylett.4c02000
21 Oct 03:15

[ASAP] Controlling Intermediate Phase Formation to Enhance Photovoltaic Performance of Inverted FA-Based Perovskite Solar Cells

by Chaohui Li, Hyoungwon Park, Shudi Qiu, Fabian Streller, Kaicheng Zhang, Zijian Peng, Jiwon Byun, Jingjing Tian, Santanu Maiti, Zhiqiang Xie, Lirong Dong, Chao Liu, Vincent M. Le Corre, Ying Shang, Jianchang Wu, Jiyun Zhang, Mingjie Feng, Andreas Späth, Karen Forberich, Andres Osvet, Thomas Heumueller, Silke H. Christiansen, Marcus Halik, Rainer H. Fink, Tobias Unruh, Ning Li, Larry Lüer, and Christoph J. Brabec

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ACS Energy Letters
DOI: 10.1021/acsenergylett.4c02580
21 Oct 03:15

[ASAP] Harnessing Vibrationally Assisted Delayed Fluorescence for Enhanced Energy Transfer in Mn-Doped CsPbBr3 Nanocrystals

by Subham Das, Sudipa Aich, Aswathy M, and Ranjani Viswanatha

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ACS Energy Letters
DOI: 10.1021/acsenergylett.4c02592
21 Oct 02:24

Fabrication and challenges for high-efficiency and up-scale perovskite solar modules

J. Mater. Chem. C, 2024, 12,17720-17741
DOI: 10.1039/D4TC03961K, Review Article
Jingyang Liao, Xiying Zhang, Shuaishuai Guo, Shaohua Zhang, Xiaotian Hu, Yiwang Chen
This review aims to provide readers with more comprehensive insights and recent advances in large-area perovskite modules.
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21 Oct 02:24

New [1]benzothieno[3,2-b]benzothiophene-tetraoxide-based TADF emitters with a D–A–D structure for OLED applications

J. Mater. Chem. C, 2024, Advance Article
DOI: 10.1039/D4TC03239J, Paper
Open Access Open Access
Maria Montrone, Antonio Maggiore, Anna Moliterni, Piotr Pander, Marco Pugliese, Agostina Lina Capodilupo, Salvatore Gambino, Carmela Tania Prontera, Vitantonio Valenzano, Fabrizio Mariano, Gianluca Accorsi, Teresa Sibillano, Cinzia Giannini, Giuseppe Gigli, Antonio Cardone, Vincenzo Maiorano
[1]Benzothieno[3,2-b]benzothiophene as a straightforward electron-acceptor building block to fabricate thermally activated delayed fluorescence (TADF) emitters.
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21 Oct 02:22

Narrow emission band ultraviolet/deep-blue thermally activated delayed fluorescence emitters modified with carbazole/carboline as a donor

J. Mater. Chem. C, 2024, 12,19498-19505
DOI: 10.1039/D4TC03503H, Paper
Pengcheng Jin, Xilin Yang, Wen-Tao Su, Shu-Hang Zhan, Xiliang Chen, Huaming Sun, Ben Yang, Shi-Jian Su, Jian-Yong Hu
Four high-efficiency ultraviolet/deep-blue narrow TADF emitters based on carbazole or carboline donor derivatives and their applications in ultraviolet/deep-blue OLEDs are demonstrated.
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21 Oct 02:19

Tailoring lattice chlorine in perovskite through dual-additive engineering for enhanced photovoltaic performance

J. Mater. Chem. A, 2024, Advance Article
DOI: 10.1039/D4TA05811A, Paper
Dun Ma, Jingwen He, Jie Sheng, Wu Shao, Zhihao Deng, Ronghao Cen, Yufei Fu, Wenjun Wu
This research investigates chloride residues originating from MACl in perovskite solar cells. A dual-additive strategy employing MACl and DMACl effectively mitigates it in printable mesoscopic perovskite solar cells, leading to enhanced efficiency.
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21 Oct 02:15

A hot exciton organic glassy scintillator for high-resolution X-ray imaging

Chem. Sci., 2024, 15,18933-18942
DOI: 10.1039/D4SC05544F, Edge Article
Open Access Open Access
Xi Yang, Jingru Chen, Yang Zhang, Yiming Di, Guozhen Zhang, Songhua Chen, Hongming Chen, Mei-Jin Lin
A large-area organic hot exciton glassy scintillator screen was developed for the first time, which features high light yield, high transmittance, and fast response. Applied to X-ray imaging, it achieves a spatial resolution of 38.5 lp mm−1.
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21 Oct 02:13

Well-regulated structure-featuring giant-molecule acceptors enable long-term stability and high-performance binary organic solar cells

Energy Environ. Sci., 2024, 17,9144-9153
DOI: 10.1039/D4EE03754E, Paper
Jingyu Shi, Pengfei Ding, Jintao Zhu, Zhenyu Chen, Shuangjiao Gao, Xueliang Yu, Xiaochun Liao, Quan Liu, Ziyi Ge
Through systematically selecting the numbers and positions of selenium atom of giant-molecule acceptors, the device based on PM6:GMA-SSeS yields the highest PCE of 19.37% with high VOC of 0.917 V and exhibits extended t80% lifetimes of 5600 h.
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