A Medium-Bandgap Nonfullerene Acceptor Enabling Organic Photovoltaic Cells with 30% Efficiency under Indoor Artificial Light

被引：62

作者：

Zhang, Tao ^{[1
,2
]}

An, Cunbin ^{[1
]}

Xu, Ye ^{[1
]}

Bi, Pengqing ^{[1
]}

Chen, Zhihao ^{[3
]}

Wang, Jingwen ^{[1
,2
]}

Yang, Ni ^{[1
,2
]}

Yang, Yi ^{[1
,2
]}

Xu, Bowei ^{[1
]}

Yao, Huifeng ^{[1
]}

Hao, Xiaotao ^{[3
]}

Zhang, Shaoqing ^{[1
]}

Hou, Jianhui ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, State Key Lab Polymer Phys & Chem,Beijing Natl La, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China

来源：

ADVANCED MATERIALS | 2022年 / 34卷 / 43期

基金：

中国国家自然科学基金;

关键词：

electrostatic potential; exciton dissociation; indoor organic photovoltaic cells; medium-bandgap acceptors; power conversion efficiency; NON-FULLERENE ACCEPTORS; DIPOLE-MOMENT; CONJUGATED POLYMERS; SOLAR-CELLS; INTERNET; PROGRESS; VOLTAGE; EXCITON; THINGS;

D O I：

10.1002/adma.202207009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The correlation between molecular structure and photovoltaic performance is lagging for constructing high-performance indoor organic photovoltaic (OPV) cells. Herein, this relationship is investigated in depth by employing two medium-bandgap nonfullerene acceptors (NFAs). The newly synthesized NFA of FTCC-Br exhibits a similar bandgap and molecular energy level, but a much stronger dipole moment and larger average electrostatic potential (ESP) compared with ITCC. After blending with the polymer donor PB2, the PB2:ITCC and PB2:FTCC-Br blends exhibit favorable bulk-heterojunction morphologies and the same driving force, but the PB2:FTCC-Br blend exhibits a large ESP difference. In OPV cells, the PB2:ITCC-based device produces a power conversion efficiency (PCE) of 11.0%, whereas the PB2:FTCC-Br-based device gives an excellent PCE of 14.8% with an open-circuit voltage (V-OC) of 1.05 V, which is the highest value among OPV cells with V-OC values above 1.0 V. When both acceptor-based devices work under a 1000 lux of 3000 K light-emitting diode, the PB2:ITCC-based 1 cm(2) device yields a good PCE of 25.4%; in contrast, the PB2:FTCC-Br-based 1 cm(2) device outputs a record PCE of 30.2%. These results suggest that a large ESP offset in photovoltaic materials is important for achieving high-performance OPV cells.

引用

页数：9

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