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100 cm^(2) Organic Photovoltaic Cells with 23%Efficiency under Indoor Illumination
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作者 Yong Cui hui-feng yao +8 位作者 Ye Xu Peng-Qing Bi Jian-Qi Zhang Tao Zhang Ling Hong Zhi-Hao Chen Zhi-Xiang Wei Xiao-Tao Hao Jian-Hui Hou 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第8期979-988,I0011,共11页
The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad attention.As organic semiconductors intrinsically have less ordered intermolecular pac... The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad attention.As organic semiconductors intrinsically have less ordered intermolecular packing than inorganic materials,the relatively larger energetic disorder is one of the main results that limit the photovoltaic efficiency of the OPV cells at low carrier density.Here,we optimize the alkyl chains of non-fullerene acceptors to get suppressed energetic disorder.We find the optimal acceptor DTz-R1 with the shortest alkyl chain has the strongest crystalline property and lowest energetic disorder.As a result,over 26%efficiency is recorded for the 1 cm^(2) OPV cells under a light-emitting diode illumination of 500 lux.We also fabricate a 100 cm^(2) cell device and get a PCE of 23.0%,which is an outstanding value for large-area OPV cells.These results suggest that modulation of the energetic disorder is of great importance for further improving the efficiency of OPV cells,especially for indoor applications. 展开更多
关键词 Organic photovoltaic cells Low light intensity Energetic disorder Energy loss Power conversion efficiency
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