Journal ArticleDOI
Tuning the hybridization of local exciton and charge‐transfer states in highly efficient organic photovoltaic cells
Ye Xu,Huifeng Yao,Lijiao Ma,Ling Hong,Jiayao Li,Qing Liao,Yunfei Zu,Jingwen Wang,Mengyuan Gao,Long Ye,Jianhui Hou +10 more
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TLDR
Taking molecular surface electrostatic potential (ESP) as a quantitative parameter, the results reveal that increasing the ESP difference between donor and acceptor will enhance the intermolecular interaction.Abstract:
Decreasing the energy loss is one of the most feasible ways to improve the efficiencies of organic photovoltaic (OPV) cells. Recent studies have suggested that non-radiative energy loss ( E non - rad loss ) is the dominant factor that hinders further improvements in state-of-the-art OPV cells. However, there is no rational molecular design strategy for OPV materials with suppressed E non - rad loss . Herein, taking molecular surface electrostatic potential (ESP) as a quantitative parameter, we establish a general relationship between chemical structure and intermolecular interactions. The results reveal that increasing the ESP difference between donor and acceptor will enhance the intermolecular interaction. In the OPV cells, the enhanced intermolecular interaction will increase the charge-transfer (CT) state ratio in its hybridization with the local exciton state to facilitate charge generation, but simultaneously result in a larger E non - rad loss . These results suggest that finely tuning the ESP of OPV materials is a feasible method to further improve the efficiencies of OPV cells.read more
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New Phase for Organic Solar Cell Research: Emergence of Y-Series Electron Acceptors and Their Perspectives
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Realizing 19.05% Efficiency Polymer Solar Cells by Progressively Improving Charge Extraction and Suppressing Charge Recombination
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Simple Non‐Fused Electron Acceptors Leading to Efficient Organic Photovoltaics
Tian-Jiao Wen,Zhi-Xi Liu,Zeng Chen,Jiadong Zhou,Ziqiu Shen,Yiqun Xiao,Xinhui Lu,Zengqi Xie,Haiming Zhu,Chang-Zhi Li,Hongzheng Chen +10 more
TL;DR: In this paper, two fully non-fused electron acceptors were developed via a two-step synthesis from single aromatic units, and the introduction of a twodimensional chain and halogenated terminals played a synergistic role in optimizing their solid stacking and orientation.
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Completely non-fused electron acceptor with 3D-interpenetrated crystalline structure enables efficient and stable organic solar cell.
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Highly efficient non-fullerene organic solar cells enabled by a delayed processing method using a non-halogenated solvent
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