Cathode engineering with perylene-diimide interlayer enabling over 17% efficiency single-junction organic solar cells.
Jia Yao,Beibei Qiu,Zhi-Guo Zhang,Lingwei Xue,Rui Wang,Chunfeng Zhang,Shanshan Chen,Shanshan Chen,Qiuju Zhou,Chenkai Sun,Chenkai Sun,Changduk Yang,Min Xiao,Lei Meng,Yongfang Li +14 more
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TLDR
The results indicate that PDINN is an effective cathode interfacial material and interlayer engineering via suitable intermolecular interactions is a feasible approach to improve device performance of OSCs.Abstract:
In organic solar cells (OSCs), cathode interfacial materials are generally designed with highly polar groups to increase the capability of lowering the work function of cathode. However, the strong polar group could result in a high surface energy and poor physical contact at the active layer surface, posing a challenge for interlayer engineering to address the trade-off between device stability and efficiency. Herein, we report a hydrogen-bonding interfacial material, aliphatic amine-functionalized perylene-diimide (PDINN), which simultaneously down-shifts the work function of the air stable cathodes (silver and copper), and maintains good interfacial contact with the active layer. The OSCs based on PDINN engineered silver-cathode demonstrate a high power conversion efficiency of 17.23% (certified value 16.77% by NREL) and high stability. Our results indicate that PDINN is an effective cathode interfacial material and interlayer engineering via suitable intermolecular interactions is a feasible approach to improve device performance of OSCs. It is desired to design cathode interfacial layers to simultaneously improve the efficiency and stability of organic solar cells and tune the cathode properties. Here, Yao et al. develop such interfacial layers for the best donor-acceptor system and achieve a high certified efficiency close to 17%.read more
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Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages
Yong Cui,Huifeng Yao,Jianqi Zhang,Tao Zhang,Yuming Wang,Ling Hong,Kaihu Xian,Bowei Xu,Shaoqing Zhang,Shaoqing Zhang,Jing Peng,Zhixiang Wei,Feng Gao,Jianhui Hou +13 more
TL;DR: This study demonstrates that finely tuning the OPV materials to reduce the bandgap-voltage offset has great potential for boosting the efficiency and unexpectedly obtain higher open-circuit voltages and achieve a record high PCE of 16.5% by chlorination.
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Layer-by-Layer Processed Ternary Organic Photovoltaics with Efficiency over 18.
Lingling Zhan,Shuixing Li,Xinxin Xia,Yaokai Li,Xinhui Lu,Lijian Zuo,Minmin Shi,Hongzheng Chen +7 more
TL;DR: In this article, a solution to resolve the above challenge via synergistically combining the layer-by-layer (LbL) procedure and the ternary strategy is proposed and demonstrated.
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A History and Perspective of Non-Fullerene Electron Acceptors for Organic Solar Cells
Ardalan Armin,Wei Li,Oskar J. Sandberg,Zuo Xiao,Liming Ding,Jenny Nelson,Dieter Neher,Koen Vandewal,Safa Shoaee,Tao Wang,Harald Ade,Thomas Heumüller,Christoph J. Brabec,Paul Meredith +13 more
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Organic Solar Cells with 18% Efficiency Enabled by an Alloy Acceptor: A Two-in-One Strategy
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TL;DR: In this paper, a ternary solar cell with a power conversion efficiency of over 18% using a largebandgap polymer donor, PM6, and a small-bandgap alloy acceptor containing two structurally similar nonfullerene acceptors (Y6 and AQx-3) is reported.
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A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%
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TL;DR: In this article, neutral Diquat (DQ) was used as n-dopant to improve the operating characteristics of organic photovoltaics (OPVs).
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