

FOLLOWUS
a.Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
b.University of Chinese Academy of Sciences, Beijing 100049, China
c.CAS key laboratory of nanosystem and hierarchical fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
d.School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
yaohf@iccas.ac.cn (H.F.Y.)
hjhzlz@iccas.ac.cn (J.H.H.)
Received:28 March 2022,
Revised:2022-4-10,
Accepted:15 April 2022,
Online First:22 June 2022,
Published:01 August 2022
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Cui, Y.; Yao, H. F.; Xu, Y.; Bi, P. Q.; Zhang, J. Q.; Zhang, T.; Hong, L.; Chen, Z. H.; Wei, Z. X.; Hao, X. T.; Hou, J. H. 100 cm2 organic photovoltaic cells with 23% efficiency under indoor illumination. Chinese J. Polym. Sci. 2022, 40, 979–988 DOI: 10.1007/s10118-022-2761-x.
Yong Cui, Hui-Feng Yao, Ye Xu, et al. 100 cm2 Organic Photovoltaic Cells with 23% Efficiency under Indoor Illumination[J]. Chinese Journal of Polymer Science, 2022, 40(8): 979-988. DOI: 10.1007/s10118-022-2761-x.
Cui, Y.; Yao, H. F.; Xu, Y.; Bi, P. Q.; Zhang, J. Q.; Zhang, T.; Hong, L.; Chen, Z. H.; Wei, Z. X.; Hao, X. T.; Hou, J. H. 100 cm2 organic photovoltaic cells with 23% efficiency under indoor illumination. Chinese J. Polym. Sci. 2022, 40, 979–988 DOI: 10.1007/s10118-022-2761-x. DOI:
Yong Cui, Hui-Feng Yao, Ye Xu, et al. 100 cm2 Organic Photovoltaic Cells with 23% Efficiency under Indoor Illumination[J]. Chinese Journal of Polymer Science, 2022, 40(8): 979-988. DOI: 10.1007/s10118-022-2761-x. DOI:
We designed and synthesized a new acceptor called DTz-R1 via suppressing the energetic disorder. The 100 cm
2
organic photovoltaic cell gives an impressive efficiency of 23.0% under indoor light illumination. Our results demonstrate that modulation of the energetic disorder can be a feasible molecular design strategy.
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.
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