Nano Letters
DOI: 10.1021/acs.nanolett.9b02497
LiJiong
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24 Aug 01:30
[ASAP] Contact Engineering High-Performance n-Type MoTe2 Transistors
by Michal J. Mleczko†#, Andrew C. Yu†?, Christopher M. Smyth‡, Victoria Chen†, Yong Cheol Shin†, Sukti Chatterjee§, Yi-Chia Tsai†??, Yoshio Nishi†, Robert M. Wallace‡, and Eric Pop*†?
Xingxing Zhang, Alex Strasser likes this
19 Aug 02:20
[ASAP] Hot-Air-Assisted Fully Air-Processed Barium Incorporated CsPbI2Br Perovskite Thin Films for Highly Efficient and Stable All-Inorganic Perovskite Solar Cells
by Sawanta S. Mali*, Jyoti V. Patil, and Chang Kook Hong*
Nano Letters
DOI: 10.1021/acs.nanolett.9b02277
Ligang Yuan, shuhui and one other like this
19 Aug 02:04
Single-phase alkylammonium cesium lead iodide quasi-2D perovskites for color-tunable and spectrum-stable red LEDs
Nanoscale, 2019, 11,16907-16918
DOI: 10.1039/C9NR02706H, Paper
DOI: 10.1039/C9NR02706H, Paper
Hong Lin, Jian Mao, Minchao Qin, Zhilong Song, Wanjian Yin, Xinhui Lu, Wallace C. H. Choy
Quantum confinement adjustment by tuning the size of single-phase quasi-2D PA2CsPb2I7 perovskite nanoplates for tunable emission colors.
The content of this RSS Feed (c) The Royal Society of Chemistry
Quantum confinement adjustment by tuning the size of single-phase quasi-2D PA2CsPb2I7 perovskite nanoplates for tunable emission colors.
The content of this RSS Feed (c) The Royal Society of Chemistry
19 Aug 02:04
Mechanochemical synthesis of three double perovskites: Cs2AgBiBr6, (CH3NH3)2TlBiBr6 and Cs2AgSbBr6
Nanoscale, 2019, 11,16650-16657
DOI: 10.1039/C9NR06092H, Paper
DOI: 10.1039/C9NR06092H, Paper
Gonzalo García-Espejo, Daily Rodríguez-Padrón, Rafael Luque, Luis Camacho, Gustavo de Miguel
Mechanochemistry is a solvent-free, simple and fast tool for the synthesis of double perovskites.
The content of this RSS Feed (c) The Royal Society of Chemistry
Mechanochemistry is a solvent-free, simple and fast tool for the synthesis of double perovskites.
The content of this RSS Feed (c) The Royal Society of Chemistry
Xuepeng Liu, Pengbin Gui likes this
19 Aug 02:01
Recent progress of light manipulation strategies in organic and perovskite solar cells
Nanoscale, 2019, 11,18517-18536
DOI: 10.1039/C9NR05663G, Review Article
DOI: 10.1039/C9NR05663G, Review Article
Jing-De Chen, Teng-Yu Jin, Yan-Qing Li, Jian-Xin Tang
This review focuses on the application of micro/nano-structures in light harvesting of organic and perovskite solar cells.
The content of this RSS Feed (c) The Royal Society of Chemistry
This review focuses on the application of micro/nano-structures in light harvesting of organic and perovskite solar cells.
The content of this RSS Feed (c) The Royal Society of Chemistry
19 Aug 01:52
PEDOT:PSS for Flexible and Stretchable Electronics: Modifications, Strategies, and Applications
by Xi Fan,
Wanyi Nie,
Hsinhan Tsai,
Naixiang Wang,
Huihui Huang,
Yajun Cheng,
Rongjiang Wen,
Liujia Ma,
Feng Yan,
Yonggao Xia
Flexible and stretchable devices come to the forefront of organic electronics. It is critical to develop conductive polymers with mechanical compliance. Here, frontier progress in conductive, stretchable, and stable poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is reviewed. This work stresses the importance of developing PEDOT:PSS and reveals the critical role of these unprecedented devices including photovoltaics, transistors, biosensors, and strain sensors.
Abstract
Substantial effort has been devoted to both scientific and technological developments of wearable, flexible, semitransparent, and sensing electronics (e.g., organic/perovskite photovoltaics, organic thin‐film transistors, and medical sensors) in the past decade. The key to realizing those functionalities is essentially the fabrication of conductive electrodes with desirable mechanical properties. Conductive polymers (CPs) of poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) have emerged to be the most promising flexible electrode materials over rigid metallic oxides and play a critical role in these unprecedented devices as transparent electrodes, hole transport layers, interconnectors, electroactive layers, or motion‐sensing conductors. Here, the current status of research on PEDOT:PSS is summarized including various approaches to boosting the electrical conductivity and mechanical compliance and stability, directly linked to the underlying mechanism of the performance enhancements. Along with the basic principles, the most cutting edge‐progresses in devices with PEDOT:PSS are highlighted. Meanwhile, the advantages and plausible problems of the CPs and as‐fabricated devices are pointed out. Finally, new perspectives are given for CP modifications and device fabrications. This work stresses the importance of developing CP films and reveals their critical role in the evolution of these next‐generation devices featuring wearable, deformable, printable, ultrathin, and see‐through characteristics.
liuxinye likes this
19 Aug 01:51
Field‐Effect Transistors Based on 2D Organic Semiconductors Developed by a Hybrid Deposition Method
by Zhiwen Zhou,
Qisheng Wu,
Sijia Wang,
Yu‐Ting Huang,
Hua Guo,
Shien‐Ping Feng,
Paddy Kwok Leung Chan
Highly crystallized 2,9‐didecyldinaphtho[2,3‐b:2′,3′‐f]thieno[3,2‐b]thiophene (C10‐DNTT) monolayer crystal with large‐area uniformity is obtained by an ultraslow shearing method. This monolayer organic semiconductor thin film is used as the template for thermally evaporated upper C10‐DNTT film. The organic thin films deposited by this hybrid approach show an interesting coherence structure with a copied molecular orientation of the templating crystal.
Abstract
Solution‐processed 2D organic semiconductors (OSCs) have drawn considerable attention because of their novel applications from flexible optoelectronics to biosensors. However, obtaining well‐oriented sheets of 2D organic materials with low defect density still poses a challenge. Here, a highly crystallized 2,9‐didecyldinaphtho[2,3‐b:2′,3′‐f]thieno[3,2‐b]thiophene (C10‐DNTT) monolayer crystal with large‐area uniformity is obtained by an ultraslow shearing (USS) method and its growth pattern shows a kinetic Wulff's construction supported by theoretical calculations of surface energies. The resulting seamless and highly crystalline monolayers are then used as templates for thermally depositing another C10‐DNTT ultrathin top‐up film. The organic thin films deposited by this hybrid approach show an interesting coherence structure with a copied molecular orientation of the templating crystal. The organic field‐effect transistors developed by these hybrid C10‐DNTT films exhibit improved carrier mobility of 14.7 cm2 V−1 s−1 as compared with 7.3 cm2 V−1 s−1 achieved by pure thermal evaporation (100% improvement) and 2.8 cm2 V−1 s−1 achieved by solution sheared monolayer C10‐DNTT. This work establishes a simple yet effective approach for fabricating high‐performance and low‐cost electronics on a large scale.
13 Aug 07:29
Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells
by Hua Li,
Guohua Wu,
Wanyi Li,
Yaohong Zhang,
Zhike Liu,
Dapeng Wang,
Shengzhong (Frank) Liu
A N,1‐diiodoformamidine (DIFA) additive is introduced in the perovskite precursor to attain high efficiency and stable perovskite solar cells (PSCs). Upon the addition of 2% DIFA, the compact, smooth, relatively hydrophobic, and large grained perovskite films are achieved with highly efficient defect passivation, which substantially increases the power conversion efficiency from 19.07% for the control device to 21.22%.
Abstract
A high‐quality perovskite photoactive layer plays a crucial role in determining the device performance. An additive engineering strategy is introduced by utilizing different concentrations of N,1‐diiodoformamidine (DIFA) in the perovskite precursor solution to essentially achieve high‐quality monolayer‐like perovskite films with enhanced crystallinity, hydrophobic property, smooth surface, and grain size up to nearly 3 µm, leading to significantly reduced grain boundaries, trap densities, and thus diminished hysteresis in the resultant perovskite solar cells (PSCs). The optimized devices with 2% DIFA additive show the best device performance with a significantly enhanced power conversion efficiency (PCE) of 21.22%, as compared to the control devices with the highest PCE of 19.07%. 2% DIFA modified devices show better stability than the control ones. Overall, the introduction of DIFA additive is demonstrated to be a facile approach to obtain high‐efficiency, hysteresis‐less, and simultaneously stable PSCs.
liuxinye likes this
13 Aug 07:29
Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells
by Hua Li,
Guohua Wu,
Wanyi Li,
Yaohong Zhang,
Zhike Liu,
Dapeng Wang,
Shengzhong (Frank) Liu
A N,1‐diiodoformamidine (DIFA) additive is introduced in the perovskite precursor to attain high efficiency and stable perovskite solar cells (PSCs). Upon the addition of 2% DIFA, the compact, smooth, relatively hydrophobic, and large grained perovskite films are achieved with highly efficient defect passivation, which substantially increases the power conversion efficiency from 19.07% for the control device to 21.22%.
Abstract
A high‐quality perovskite photoactive layer plays a crucial role in determining the device performance. An additive engineering strategy is introduced by utilizing different concentrations of N,1‐diiodoformamidine (DIFA) in the perovskite precursor solution to essentially achieve high‐quality monolayer‐like perovskite films with enhanced crystallinity, hydrophobic property, smooth surface, and grain size up to nearly 3 µm, leading to significantly reduced grain boundaries, trap densities, and thus diminished hysteresis in the resultant perovskite solar cells (PSCs). The optimized devices with 2% DIFA additive show the best device performance with a significantly enhanced power conversion efficiency (PCE) of 21.22%, as compared to the control devices with the highest PCE of 19.07%. 2% DIFA modified devices show better stability than the control ones. Overall, the introduction of DIFA additive is demonstrated to be a facile approach to obtain high‐efficiency, hysteresis‐less, and simultaneously stable PSCs.
wei junfeng, liuxinye likes this
13 Aug 07:28
PEDOT:PSS for Flexible and Stretchable Electronics: Modifications, Strategies, and Applications
by Xi Fan,
Wanyi Nie,
Hsinhan Tsai,
Naixiang Wang,
Huihui Huang,
Yajun Cheng,
Rongjiang Wen,
Liujia Ma,
Feng Yan,
Yonggao Xia
Flexible and stretchable devices come to the forefront of organic electronics. It is critical to develop conductive polymers with mechanical compliance. Here, frontier progress in conductive, stretchable, and stable poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is reviewed. This work stresses the importance of developing PEDOT:PSS and reveals the critical role of these unprecedented devices including photovoltaics, transistors, biosensors, and strain sensors.
Abstract
Substantial effort has been devoted to both scientific and technological developments of wearable, flexible, semitransparent, and sensing electronics (e.g., organic/perovskite photovoltaics, organic thin‐film transistors, and medical sensors) in the past decade. The key to realizing those functionalities is essentially the fabrication of conductive electrodes with desirable mechanical properties. Conductive polymers (CPs) of poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) have emerged to be the most promising flexible electrode materials over rigid metallic oxides and play a critical role in these unprecedented devices as transparent electrodes, hole transport layers, interconnectors, electroactive layers, or motion‐sensing conductors. Here, the current status of research on PEDOT:PSS is summarized including various approaches to boosting the electrical conductivity and mechanical compliance and stability, directly linked to the underlying mechanism of the performance enhancements. Along with the basic principles, the most cutting edge‐progresses in devices with PEDOT:PSS are highlighted. Meanwhile, the advantages and plausible problems of the CPs and as‐fabricated devices are pointed out. Finally, new perspectives are given for CP modifications and device fabrications. This work stresses the importance of developing CP films and reveals their critical role in the evolution of these next‐generation devices featuring wearable, deformable, printable, ultrathin, and see‐through characteristics.
13 Aug 07:25
Thermally Stable Donor–Acceptor Type (Alkynyl)Gold(III) TADF Emitters Achieved EQEs and Luminance of up to 23.4% and 70 300 cd m−2 in Vacuum‐Deposited OLEDs
by Dongling Zhou,
Wai‐Pong To,
Yoonhyun Kwak,
Yongsuk Cho,
Gang Cheng,
Glenna So Ming Tong,
Chi‐Ming Che
Donor–acceptor type cyclometalated Au(III) alkynyl complexes display highly efficient thermally activated delayed fluorescence (TADF) with Φ up to 88% in thin films and emission lifetimes of ≈1–2 µs at room temperature. Vacuum‐deposited organic light‐emitting diodes (OLEDs) with these emissive dopants achieve external quantum efficiencies (EQEs) and luminance of up to 23.4% and 70 300 cd m−2, respectively.
Abstract
Thermally stable, strongly luminescent gold‐TADF emitters are the clue to realize practical applications of gold metal in next generation display and lighting technology, a scarce example of which is herein described. A series of donor–acceptor type cyclometalated gold(III) alkynyl complexes with some of them displaying highly efficient thermally activated delayed fluorescence (TADF) with Φ up to 88% in thin films and emission lifetimes of ≈1–2 µs at room temperature are developed. The emission color of these complexes is readily tunable from green to red by varying the donor unit and cyclometalating ligand. Vacuum‐deposited organic light‐emitting diodes (OLEDs) with these complexes as emissive dopants achieve external quantum efficiencies (EQEs) and luminance of up to 23.4% and 70 300 cd m−2, respectively.
11 Aug 00:48
[ASAP] Suppression and Reversion of Light-Induced Phase Separation in Mixed-Halide Perovskites by Oxygen Passivation
by Weisheng Fan†‡§#, Yongliang Shi‡§#, Tongfei Shi†, Shenglong Chu†‡§, Wenjing Chen‡§, Kester O. Ighodalo‡§, Jin Zhao*‡§, Xinhua Li*†, and Zhengguo Xiao*‡§
ACS Energy Letters
DOI: 10.1021/acsenergylett.9b01383
北极光 likes this
07 Aug 02:26
[ASAP] Giant Humidity Effect on Hybrid Halide Perovskite Microstripes: Reversibility and Sensing Mechanism
by Md Azimul Haque†, Ahad Syed‡, Faheem Hassan Akhtar§, Rahul Shevate§, Simrjit Singh?, Klaus-Viktor Peinemann§, Derya Baran†, and Tom Wu*?
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.9b07751
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