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28 May 07:17

Lead-free tin perovskite solar cells

by Tianhao Wu, Xiao Liu, Xinhui Luo, Xuesong Lin, Danyu Cui, Yanbo Wang, Hiroshi Segawa, Yiqiang Zhang, Liyuan Han
Perovskite solar cells (PSCs) have emerged as one of the third-generation photovoltaic technologies. However, the toxicity issue of lead in perovskite absorbers hinders their large-scale production. Thus, developing lead-free tin PSCs becomes an important solution to overcome this challenge. Here, a comprehensive review on the progress of tin PSCs based on equivalent circuit modeling is provided. Furthermore, the perspectives on obtaining 20% efficiency, enlarging device area, and realizing the scalable production of tin PSCs are discussed.
07 May 06:40

Efficient hole transport layers based on cross-linked poly(N-vinylcarbazole) for high-performance perovskite photodetectors

J. Mater. Chem. C, 2021, 9,11722-11728
DOI: 10.1039/D1TC01367J, Paper
Lijuan He, Deyu Wang, Yan Zhao, Yiqi Zhang, Wei Wei, Liang Shen
The cross-linked PVK doping with F4TCNQ demonstrated outstanding hole extraction and transport capability, has been successfully used in p–i–n perovskite photodetectors as an efficient hole transport layer (HTL).
The content of this RSS Feed (c) The Royal Society of Chemistry
06 May 02:45

Tetra-indole core as a dual agent: a hole selective layer that passivates defects in perovskite solar cells

J. Mater. Chem. C, 2021, 9,7074-7082
DOI: 10.1039/D1TC01258D, Paper
Meenakshi Pegu, Samrana Kazim, Peng Huang, Luis Lezama, Shahzada Ahmad
An organic small molecule composed of a tetra-indole core was introduced as a hole selective layer that can also act a passivating agent to supress the surface defects in perovskite solar cells (PSCs).
The content of this RSS Feed (c) The Royal Society of Chemistry
06 May 02:19

Improving the performance of organic solar cells by side chain engineering of fused ring electron acceptors

J. Mater. Chem. C, 2021, 9,6937-6943
DOI: 10.1039/D1TC00579K, Paper
Ya-Nan Chen, Rui Zheng, Jing Wang, Hang Wang, Miao Li, Yunzhi Wang, Hao Lu, Zhe Zhang, Yahui Liu, Zheng Tang, Zhishan Bo
The side chain engineering of photoactive materials is one of the most commonly used molecular design strategies for developing high performance organic solar cells (OSCs).
The content of this RSS Feed (c) The Royal Society of Chemistry
06 May 02:18

Planar heterojunctions for reduced non-radiative open-circuit voltage loss and enhanced stability of organic solar cells

J. Mater. Chem. C, 2021, 9,11715-11721
DOI: 10.1039/D1TC01536B, Paper
Yawen Li, Yuze Lin
Planar heterojunction organic solar cells exhibit lower trap density, higher electroluminescence efficiency, smaller non-radiative open-circuit voltage loss and better stability than bulk heterojunction counterparts.
The content of this RSS Feed (c) The Royal Society of Chemistry
06 May 02:08

[ASAP] An Inkjet-Printed PEDOT:PSS-Based Stretchable Conductor for Wearable Health Monitoring Device Applications

by Li-Wei Lo, Junyi Zhao, Haochuan Wan, Yong Wang, Shantanu Chakrabartty, and Chuan Wang

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c00537
30 Apr 02:09

[ASAP] Surface Modification of PEDOT:PSS for Enhanced Performance of Inverted Perovskite Solar Cells

by Puan Lin, Wenfeng Zhang, Liuwen Tian, Lingbo Jia, Fang Wen, Gongtao Duan, Xiangqing Zhou, Shenghou Zhou, Fu Zhang, Yutong Jiang, Tao Chen, Fengguang Liu, Shangfeng Yang, and Yuelong Huang

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ACS Applied Energy Materials
DOI: 10.1021/acsaem.0c03249
30 Apr 02:06

[ASAP] Smart Strategy: Transparent Hole-Transporting Polymer as a Regulator to Optimize Photomultiplication-type Polymer Photodetectors

by Kaixuan Yang, Jian Wang, Zijin Zhao, Zhengji Zhou, Ming Liu, Jian Zhang, Zhiqun He, and Fujun Zhang

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c06486
30 Apr 02:05

[ASAP] Fabrication of High VOC Organic Solar Cells with a Non-Halogenated Solvent and the Effect of Substituted Groups for “Same-A-Strategy” Material Combinations

by Tingting Dai, Peng Lei, Bao Zhang, Ailing Tang, Yanfang Geng, Qingdao Zeng, and Erjun Zhou

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c03757
30 Apr 02:01

A Quinoxaline‐Based D–A Copolymer Donor Achieving 17.62% Efficiency of Organic Solar Cells

by Can Zhu, Lei Meng, Jinyuan Zhang, Shucheng Qin, Wenbin Lai, Beibei Qiu, Jun Yuan, Yan Wan, Wenchao Huang, Yongfang Li
A Quinoxaline-Based D–A Copolymer Donor Achieving 17.62% Efficiency of Organic Solar Cells

Two D–A copolymers, PBQ5 and PBQ6, are designed and synthesized based on difluoroquinoxaline (DFQ) units with different side chains. The organic solar cell (OSC) based on PBQ6 as donor and Y6 as acceptor achieves a high power conversion efficiency of 17.62%, which is one of the highest efficiencies for binary OSCs with a polymer donor and Y6 acceptor.


Abstract

Side-chain engineering has been an effective strategy in tuning electronic energy levels, intermolecular interaction, and aggregation morphology of organic photovoltaic materials, which is very important for improving the power conversion efficiency (PCE) of organic solar cells (OSCs). In this work, two D–A copolymers, PBQ5 and PBQ6, are designed and synthesized based on bithienyl-benzodithiophene (BDTT) as the donor (D) unit, difluoroquinoxaline (DFQ) with different side chains as the acceptor (A) unit, and thiophene as the π-bridges. PBQ6 with two alkyl-substituted fluorothiophene side chains on the DFQ units possesses redshifted absorption, stronger intermolecular interaction, and higher hole mobility than PBQ5 with two alkyl side chains on the DFQ units. The blend film of the PBQ6 donor with the Y6 acceptor shows higher and balanced hole/electron mobilities, less charge carrier recombination, and more favorable aggregation morphology. Therefore, the OSC based on PBQ6:Y6 achieves a PCE as high as 17.62% with a high fill factor of 77.91%, which is significantly higher than the PCE (15.55%) of the PBQ5:Y6-based OSC. The PCE of 17.62% is by far one of the highest efficiencies for the binary OSCs with polymer donor and Y6 acceptor.

29 Apr 02:14

One-micron-thick organic indoor light harvesters with low photocurrent loss and fill factors over 67%

J. Mater. Chem. A, 2021, 9,13515-13521
DOI: 10.1039/D1TA02345D, Paper
Tong Wang, Zhen-Chuan Wen, Liu-Hong Xu, Chao-Chao Qin, Hang Yin, Jian-Qiang Liu, Xiao-Tao Hao
A diluting strategy with insulating polystyrene is adopted in indoor light harvesters, and achieves high-performance 1-micron-thick photovoltaic device with low trap state density and a record fill factor over 67% under light-emitting diode lights.
The content of this RSS Feed (c) The Royal Society of Chemistry
29 Apr 02:14

Effective stability enhancement in ZnO-based perovskite solar cells by MACl modification

J. Mater. Chem. A, 2021, 9,12161-12168
DOI: 10.1039/D1TA02697F, Paper
Chunyu Liu, Wei Wu, Dezhong Zhang, Zhuowei Li, Guanhua Ren, Wenbin Han, Wenbin Guo
To overcome the shortcomings of ZnO in PSCs comprising organic cations-based perovskite, MACl is used to eliminate the deprotonization ability of ZnO, which thereby enhances the stability and improves the device efficiency, simultaneously.
The content of this RSS Feed (c) The Royal Society of Chemistry
28 Apr 04:41

[ASAP] Facile Approach to Conductive Polymer Microelectrodes for Flexible Electronics

by Zhenwu Wang, Haijun Cui, Shuai Li, Xiaowei Feng, Jasmin Aghassi-Hagmann, Saeid Azizian, and Pavel A. Levkin

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c22519
28 Apr 04:30

Optimization of active layer morphology by small-molecule donor design enables over 15% efficiency in small-molecule organic solar cells

J. Mater. Chem. A, 2021, 9,13653-13660
DOI: 10.1039/D0TA12242D, Paper
Cunbin An, Yunpeng Qin, Tao Zhang, Qianglong Lv, Jinzhao Qin, Shaoqing Zhang, Chang He, Harald Ade, Jianhui Hou
Two conjugated small molecules with different conjugated side chains were synthesized to study their photovoltaic performances.
The content of this RSS Feed (c) The Royal Society of Chemistry
27 Apr 01:44

BODIPY-Modified Terpolymer Donors for Efficient Fullerene- and Nonfullerene-Polymer Solar Cells

J. Mater. Chem. C, 2021, Accepted Manuscript
DOI: 10.1039/D1TC01290H, Paper
Xuyu Gao, Ruitao Yu, Xiaochen Song, Xianwang Tao, Huabin Wang, Mengyuan Zhu, Yijing Wu, Yinming He, Youtian Tao
Developing efficient polymer donor materials to well-match with acceptors affords continuous contributions to the eminent progress of polymer solar cells (PSCs). Herein, a new series of terpolymer donors is developed...
The content of this RSS Feed (c) The Royal Society of Chemistry
27 Apr 01:40

[ASAP] Self-Adhesive, Stretchable, Biocompatible, and Conductive Nonvolatile Eutectogels as Wearable Conformal Strain and Pressure Sensors and Biopotential Electrodes for Precise Health Monitoring

by Shan Wang, Hanlin Cheng, Bing Yao, Hao He, Lei Zhang, Shizhong Yue, Zongrong Wang, and Jianyong Ouyang

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c04671
27 Apr 01:40

[ASAP] Low-Cost Hole-Transporting Materials Based on Carbohelicene for High-Performance Perovskite Solar Cells

by Yeo-Sin Lin, Seid Yimer Abate, Chun-I Wang, Yuh-Sheng Wen, Chih-I Chen, Chao-Ping Hsu, Chu-Chen Chueh, Yu-Tai Tao, and Shih-Sheng Sun

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c02004
27 Apr 01:37

[ASAP] Correlating Charge-Transfer State Lifetimes with Material Energetics in Polymer:Non-Fullerene Acceptor Organic Solar Cells

by Yifan Dong, Hyojung Cha, Helen L. Bristow, Jinho Lee, Aditi Kumar, Pabitra Shakya Tuladhar, Iain McCulloch, Artem A. Bakulin, and James R. Durrant

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Journal of the American Chemical Society
DOI: 10.1021/jacs.1c00584
27 Apr 01:26

A New Conjugated Polymer that Enables the Integration of Photovoltaic and Light‐Emitting Functions in One Device

by Ye Xu, Yong Cui, Huifeng Yao, Tao Zhang, Jianqi Zhang, Lijiao Ma, Jingwen Wang, Zhixiang Wei, Jianhui Hou
A New Conjugated Polymer that Enables the Integration of Photovoltaic and Light-Emitting Functions in One Device

A new wide-bandgap conjugated polymer, PBQx-TCl, exhibits 18% efficiency for outdoor application and 28.5% efficiency for indoor application. Simultaneously, the PBQx-TCl-based device also shows light-emitting function with broad emission ranges from 630 to 1000 nm and moderate external quantum efficiency approaching 0.2%.


Abstract

Exploring the intriguing bifunctional nature of organic semiconductors and investigating the feasibility of fabricating bifunctional devices are of great significance in realizing various applications with one device. Here, the design of a new wide-bandgap polymer named PBQx-TCl (optical bandgap of 2.05 eV) is reported, and its applications in photovoltaic and light-emitting devices are studied. By fabricating devices with nonfullerene acceptors BTA3 and BTP-eC9, it is shown that the devices exhibit a high power conversion efficiency (PCE) of 18.0% under air mass 1.5G illumination conditions and an outstanding PCE of 28.5% for a 1 cm2 device and 26.0% for a 10 cm2 device under illumination from a 1000 lux light-emitting diode. In addition, the PBQx-TCl:BTA3-based device also demonstrates a moderate organic light-emitting diode performance with an electroluminescence external quantum efficiency approaching 0.2% and a broad emission range of 630–1000 nm. These results suggest that the polymer PBQx-TCl-based devices exhibit outstanding photovoltaic performance and potential light-emitting functions.

25 Apr 02:43

Machine learning-assisted development of organic photovoltaics via high-throughput in-situ formulation

Energy Environ. Sci., 2021, Accepted Manuscript
DOI: 10.1039/D1EE00641J, Paper
Na Gyeong An, Doojin Vak, Jin Young Kim
Discovery of high-performance non-fullerene acceptors and ternary blend systems have resulted in a breakthrough in the efficiency of organic photovoltaics (OPVs) and created new opportunities for commercialization. However, manufacturing technology...
The content of this RSS Feed (c) The Royal Society of Chemistry
23 Apr 07:26

Highly sensitive, broad-band organic photomultiplication-type photodetectors covering UV-Vis-NIR

J. Mater. Chem. C, 2021, Accepted Manuscript
DOI: 10.1039/D1TC00555C, Paper
Fujun Zhang, Ming Liu, Jian Wang, Kaixuan Yang, Zijin Zhao, Zheng-Ji Zhou, Yao MA, Liang Shen, Xiaoling Ma
UV-Vis-NIR broad-band organic photomultiplication-type photodetectors (OPMPDs) were fabricated with device structure of indium tin oxide (ITO)/ zinc oxide (ZnO)/(~150 nm) active layers/Au. The active layers are consisted with 2,2'-((2Z,2'Z)-((12,13-bis(2-ethylhexyl)-3-undecyl-9-(undecyloxy)-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[3,2-b]indole-2,10-diyl)bis(methaneylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H,1-diylidene))dimalononitrile (Y6-1O):5-(5-(4,8-bis(4-chloro-5-(2-ethylhexyl)thiophen-2-yl)-6-methylbenzo[1,2-b:4,5-b']dithiophen-2-yl)-4-(2-butyloctyl)-2-yl)-8-(4-(2-butyloctyl)-5-thiophen-2-yl)dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-c][1,2,5]thiadiazole...
The content of this RSS Feed (c) The Royal Society of Chemistry
23 Apr 07:25

Rational compatibility in ternary matrix enables all-small-molecule organic solar cells with over 16% efficiency

Energy Environ. Sci., 2021, Accepted Manuscript
DOI: 10.1039/D1EE00496D, Paper
Mengyun Jiang, Hairui Bai, Hongfu Zhi, Lu Yan, Han Young Woo, Lijia Tong, Jin-Liang Wang, Fujun Zhang, Qiaoshi An
How to manipulate the phase separation and molecular arrangement to meet the need of efficient charge generation and extraction remains as the long-standing challenge in all-small-molecule organic solar cells (ASM-OSCs)....
The content of this RSS Feed (c) The Royal Society of Chemistry
23 Apr 07:25

[ASAP] High-Efficiency and Stable Organic Solar Cells with Stacked LiF and Organic Electrolytes as Cathode Interface Layers

by Jingpeng Ren, Kaihua Ning, Haifen Liu, Zixuan Zhu, Weili Fan, Lixin Wang, Xiaohui Zhao, and Shaopeng Yang

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ACS Applied Energy Materials
DOI: 10.1021/acsaem.1c00108
23 Apr 07:17

[ASAP] Mechanically Robust and Flexible Perovskite Solar Cells via a Printable and Gelatinous Interface

by Tangyue Xue, Gangshu Chen, Xiaotian Hu, Meng Su, Zengqi Huang, Xiangchuan Meng, Ze Jin, Jiale Ma, Yiqiang Zhang, and Yanlin Song

TOC Graphic

ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c00813
22 Apr 00:42

Naphthalenothiophene imide-based polymer exhibiting over 17% efficiency

by Gongya Zhang, Haijun Ning, Hui Chen, Qiuju Jiang, Jiaquan Jiang, Pengwei Han, Li Dang, Meichen Xu, Ming Shao, Feng He, Qinghe Wu
Electron-deficient naphthalenothiophene imide (NTI) is designed to construct a new family of polymer donors. Polymer chain modification by introducing extra thiophenes impacts film-forming properties, which is proven to be an effective strategy to elevate NTI-based device performance. The efficiency of PNTB is only about 3.81%, while PNTB-2T-based binary and ternary devices exhibit efficiencies of 16.72% and 17.35% as well as excellent batch-to-batch reproducibility. This indicates that NTI is a promising construction unit for next-generation non-fullerene polymer donors.
22 Apr 00:41

16% efficiency all-polymer organic solar cells enabled by a finely tuned morphology via the design of ternary blend

by Tao Liu, Tao Yang, Ruijie Ma, Lingling Zhan, Zhenghui Luo, Guangye Zhang, Yuan Li, Ke Gao, Yiqun Xiao, Jianwei Yu, Xinhui Zou, Huiliang Sun, Maojie Zhang, Top Archie Dela Peña, Zengshan Xing, Heng Liu, Xiaojun Li, Gang Li, Jianhua Huang, Chunhui Duan, Kam Sing Wong, Xinhui Lu, Xugang Guo, Feng Gao, Hongzheng Chen, Fei Huang, Yongfang Li, Yuliang Li, Yong Cao, Bo Tang, He Yan
Ternary blend PM6:PY-IT:BN-T shows a 16.09% PCE, outperforming its binary counterpart PM6:PY-IT’s 15.11%, together with better operational stability.
22 Apr 00:39

High-performance and eco-friendly semitransparent organic solar cells for greenhouse applications

by Di Wang, Haoran Liu, Yuhao Li, Guanqing Zhou, Lingling Zhan, Haiming Zhu, Xinhui Lu, Hongzheng Chen, Chang-Zhi Li
High-performance, spectrally engineered semitransparent organic solar cells (ST-OSCs) have been developed for greenhouse applications. Empowered by the newly designed multi-component blends, quaternary OSCs are obtained with an excellent power conversion efficiency (PCE) of 17.71%. More importantly, ST-OSCs with 13.08% PCE and a plant growth factor of 24.7% are developed from non-halogenated solvent fabrication, exhibiting promising features as eco-friendly greenhouse photovoltaics.
21 Apr 01:06

[ASAP] Deciphering Electron Interplay at the Fullerene/Sputtered TiOx Interface: A Barrier-Free Electron Extraction for Organic Solar Cells

by Dylan Amelot, Mehrad Ahmadpour, Quim Ros, Hervé Cruguel, Nicolas Casaretto, Albano Cossaro, Luca Floreano, Morten Madsen, and Nadine Witkowski

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ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.1c01966
20 Apr 13:07

Tremendously Enhanced Photocurrent Enabled by Triplet-Triplet Annihilation Up-Conversion for High-Performance Perovskite Solar Cells

Energy Environ. Sci., 2021, Accepted Manuscript
DOI: 10.1039/D1EE00631B, Paper
Wangping Sheng, Jia Yang, Xiang Li, Gengling Liu, Zhuojia Lin, Juan Long, Shuqin Xiao, Licheng Tan, Yiwang Chen
The limited solar spectra utilization hinders the further amelioration of perovskite solar cells (PVSCs) performance. Up-conversion (UC) process extends the spectral absorption of PVSCs from visible to near-infrared (NIR) range...
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20 Apr 12:12

[ASAP] Brominated Small-Molecule Acceptors with a Simple Non-fused Framework for Efficient Organic Solar Cells

by Li Zhang, Silong Tu, Wen Wang, and Qidan Ling

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ACS Applied Energy Materials
DOI: 10.1021/acsaem.1c00369