Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss

Xiaopeng Duan; Wei Song; Jiawei Qiao; Xiaoming Li; Yunhao Cai; Hongbo Wu; Jie Zhang; Xiaotao Hao; Zheng Tang; Ziyi Ge; Fei Huang; Yanming Sun

doi:10.1039/D1EE03989J

Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss†

Xiaopeng Duan,^a Wei Song,^b Jiawei Qiao,^c Xiaoming Li,^a Yunhao Cai,^a Hongbo Wu,^d Jie Zhang,

^e Xiaotao Hao,

^c Zheng Tang,

*^d Ziyi Ge,

*^b Fei Huang

^e and Yanming Sun

*^a

Author affiliations

* Corresponding authors

^a School of Chemistry, Beihang University, Beijing 100191, P. R. China
E-mail: sunym@buaa.edu.cn

^b Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo 315201, P. R. China
E-mail: geziyi@nimte.ac.cn

^c School of Physics State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China

^d State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-Dimension Materials College of Materials Science and Engineering Donghua University, Shanghai 201620, P. R. China
E-mail: ztang@dhu.edu.cn

^e State Key Laboratory of Luminescent Materials and Devices South China University of Technology, Guangzhou 510640, P. R. China

Abstract

The ternary strategy has been identified as a feasible and effective way to obtain high-efficiency organic solar cells (OSCs). However, for most ternary OSCs, the voltage loss (V_loss) lies between those of the two binary devices, which inevitably limits the further efficiency improvements. Herein, a non-fullerene acceptor ZY-4Cl, possessing complementary absorption spectra and forming a cascade LUMO energy level alignment with the PM6:BTP-eC9 blend, was introduced as a third component to fabricate ternary OSCs. Compared to the binary blends, the ternary system exhibits reduced density of trap states, improved molecular ordering, and suppressed non-radiative recombination, and thereby yields an obviously lower V_loss than either of the binary OSCs. As a result, high efficiencies of 18.69% (certified as 18.2%) and 16.07% are obtained for the rigid and flexible OSCs, respectively. This work highlights the importance of suppressing non-radiative recombination in OSCs by using a ternary strategy and expands an effective avenue for the realization of efficient wearable electronics as novel photovoltaic power sources.

Energy & Environmental Science

Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss

Social activity

Search articles by author

Spotlight

Advertisements