Fibril Network Strategy Enables High‐Performance Semitransparent Organic Solar Cells

Xie, Yuanpeng; Cai, Yunhao; Zhu, Lei; Xia, Ruoxi; Ye, Linglong; Feng, Xiang; Yip, Hin‐Lap; Liu, Feng; Lu, Guanghao; Tan, Songting; Sun, Yanming

doi:10.1002/adfm.202002181

Fibril Network Strategy Enables High‐Performance Semitransparent Organic Solar Cells

Journal Article · Mon May 25 00:00:00 EDT 2020 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.202002181· OSTI ID:1630674

Xie, Yuanpeng ^[1]; Cai, Yunhao ^[1]; Zhu, Lei ^[2]; Xia, Ruoxi ^[3]; Ye, Linglong ^[4]; Feng, Xiang ^[5]; Yip, Hin‐Lap ^[3]; Liu, Feng ^[2]; Lu, Guanghao ^[5]; Tan, Songting ^[6]; ^[1]

School of Chemistry Beihang University Beijing 100191 P. R. China
School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 P. R. China
School of Chemistry Beihang University Beijing 100191 P. R. China, College of Chemistry Xiangtan University Xiangtan 411105 P. R. China
Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an 710054 P. R. China
College of Chemistry Xiangtan University Xiangtan 411105 P. R. China

Abstract

The development of semitransparent organic solar cells (ST‐OSCs) represents a significant step toward the commercialization of OSCs. However, the trade‐off between power conversion efficiency (PCE) and average visible transmittance (AVT) restricts further improvements of ST‐OSCs. Herein, it is demonstrated that a fibril network strategy can enable ST‐OSCs with a high PCE and AVT simultaneously. A wide‐bandgap polymer PBT1‐C‐2Cl that can self‐assemble into a fibril nanostructure is used as the donor and a near‐infrared small molecule Y6 is adopted as the acceptor. It is found that a tiny amount of PBT1‐C‐2Cl in the blend can form a high speed pathway for hole transport due to the well distributed fibril nanostructure, which increases the transmittance in the visible region. Meanwhile, the acceptor Y6 guarantees sufficient light absorption. Using this strategy, the optimized ST‐OSCs yield a high PCE of 9.1% with an AVT of over 40% and significant light utilization efficiency of 3.65% at donor/acceptor ratio of 0.25:1. This work demonstrates a simple and effective approach to realizing high PCE and AVT of ST‐OSCs simultaneously.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1630674

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 28 Vol. 30; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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