Unraveling the Photovoltaic, Mechanical, and Microstructural Properties and Their Correlations in Simple Poly(3‐pentylthiophene) Solar Cells

Yang, Xuantong; Gao, Mengyuan; Bi, Zhaozhao; Liu, Yang; Xian, Kaihu; Peng, Zhongxiang; Qi, Qingchun; Li, Saimeng; Song, Jinsheng; Ma, Wei; Ye, Long

doi:10.1002/marc.202200229

Unraveling the Photovoltaic, Mechanical, and Microstructural Properties and Their Correlations in Simple Poly(3‐pentylthiophene) Solar Cells

Journal Article · 27 May 2022 · Macromolecular Rapid Communications

DOI:https://doi.org/10.1002/marc.202200229· OSTI ID:2422755

Yang, Xuantong ^[1]; Gao, Mengyuan ^[1]; Bi, Zhaozhao ^[2]; Liu, Yang ^[1]; Xian, Kaihu ^[1]; Peng, Zhongxiang ^[1]; Qi, Qingchun ^[1]; Li, Saimeng ^[1]; Song, Jinsheng ^[3]; Ma, Wei ^[2]; ^[4]

School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300350 China
State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China
Engineering Research Center for Nanomaterials Henan University Kaifeng 475004 China
School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Sciences Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300350 China; Energy Materials and Optoelectronics Unit Songshan Lake Materials Laboratory Dongguan 523808 China

Abstract

The power conversion efficiency of polythiophene organic solar cells is constantly refreshed. Despite the renewed device efficiency, very few efforts have been devoted to understanding how the type of electron acceptor alters the photovoltaic and mechanical properties of these low‐cost solar cells. Herein, the authors conduct a thorough investigation of photovoltaic and mechanical characteristics of a simple yet less‐explored polythiophene, namely poly(3‐pentylthiophene) (P3PT), in three different types of organic solar cells, where ZY‐4Cl, PC₇₁BM, and N2200 are employed as three representative acceptors, respectively. Compared with the reference poly(3‐hexylthiophene) (P3HT)‐based solar cells, P3PT‐based devices, all perform more efficiently. Particularly, the P3PT:ZY‐4Cl blend exhibits the highest efficiency (ca. 10%) among the six combinations and outperforms the prior top‐performance system P3HT:ZY‐4Cl. Furthermore, the blend films based on N2200 exhibit a high crack‐onset strain of ∼38% on average, which is approximately 15‐ and 17‐times higher than those of ZY‐4Cl and PC₇₁BM, respectively. The microstructural origins for the above difference are well elucidated by detailed grazing incidence X‐ray scattering and microscopy analysis. This work not only underlines the potential of P3PT in prolific solar cell research but also demonstrates the superior tensile properties of polythiophene‐based all‐polymer blends for the preparation of stretchable solar cells.

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC02-05CH11231

OSTI ID:: 2422755

Journal Information:: Macromolecular Rapid Communications, Journal Name: Macromolecular Rapid Communications Journal Issue: 22 Vol. 43; ISSN 1022-1336

Publisher:: Wiley

Country of Publication:: United States

Language:: English

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