Citation: Yingying Zhao, Liuyang Zhou, Xiaobo Wu, Xiaosha Wang, Yungui Li, Yazhou Qi, Lihui Jiang, Guohui Chen, Yingping Zou. Ternary organic solar cells: Improved optical and morphological properties allow an enhanced efficiency[J]. Chinese Chemical Letters, ;2021, 32(4): 1359-1362. doi: 10.1016/j.cclet.2020.09.032 shu

Ternary organic solar cells: Improved optical and morphological properties allow an enhanced efficiency

Yingying Zhao ^{a, 1} ,
Liuyang Zhou ^{b, 1} ,
Xiaobo Wu ^c ,
Xiaosha Wang ^a ,
Yungui Li ^d ,
Yazhou Qi ^a ,
Lihui Jiang ^{a, *,} ,
Guohui Chen ^{a, *,} ,
Yingping Zou ^a

a.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
b.
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
c.
College of Metallurgy and Materials Engineering, Hunan University of Technology, Zhuzhou 412000, China
d.
Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

jianglh@csu.edu.cn

gh-ch@163.com

Received Date: 8 July 2020
Revised Date: 28 August 2020
Accepted Date: 21 September 2020
Available Online: 22 September 2020

Figures(4)

The power conversion efficiency (PCE) of OFQx-T: PC₇₁BM blend films reaches 7.59%. On this basis, ternary organic solar cells (OSCs) were fabricated with ITIC or PTB7-Th as the third component. The ternary OSCs with 50 wt% ITIC in acceptors exhibits an enhanced efficiency, from 7.59% to 8.17%. Also, the PCE of ternary OSCs with 50 wt% PTB7-Th in donors achieves 8.72%, which is 13% higher than that of binary OSCs. The PCE improvement of two ternary OSCs is mainly due to the increase of short-circuit current density (J_sc), which can be attributed to the complementary absorption spectra and improved film morphology. This work suggests that the selection of an appropriate third component plays a critical role in improving the PCE of ternary OSCs.
- Ternary OSCs,
- Broaden absorption spectra,
- Morphology optimization,
- Appropriate third component
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