The Intrinsic Role of Molecular Mass and Polydispersity Index in High-Performance Non-Fullerene Polymer Solar Cells

作者:Shi, MM (Shi, Mumin)[ 1 ] ; Wang, T (Wang, Tao)[ 1 ] ; Wu, Y (Wu, Yao)[ 1 ] ; Sun, R (Sun, Rui)[ 1 ] ; Wang, W (Wang, Wei)[ 1 ] ; Guo, J (Guo, Jing)[ 1 ] ; Wu, Q (Wu, Qiang)[ 1 ] ; Yang, WY (Yang, Wenyan)[ 1 ] ; Min, J (Min, Jie)[ 1,2,3 ]

ADVANCED ENERGY MATERIALS

文献号: 2002709

DOI: 10.1002/aenm.202002709

Early access icon在线发表日期: NOV 2020

文献类型:Article; Early Access

摘要

The degree of polymerization can cause significant changes in the blend microstructure and physical mechanism of the active layer of non-fullerene polymer solar cells, resulting in a huge difference in device performance. However, the diversity of stability issues, including photobleaching stability, storage stability, photostability, thermal stability, and mechanical stability, and more, poses a challenge for the degree of polymerization to comprehensively address the trade-off between device efficiency and stability and reasonably evaluate the application potential of polymer materials. Herein, a series of PM6 polymers with different weight-average molecular weights (M-w) and polydispersity index (PDI) are synthesized. The effects of the degree of PM6 polymerization on the efficiency and degradation behaviors of the photovoltaic systems based on Y6 as acceptor are investigated systematically. The findings regarding stability issues, together with the trade-offs in the efficiency-stability gap, formulate a complete guideline for the material design and performance evaluation in a way that relies much less on trial-and-error efforts.

关键词

作者关键词:device stability; molecular mass; photovoltaic performance; polydispersity index; polymer solar cells

KeyWords Plus:WEIGHT; EFFICIENCY; STABILITY; POLYMERFULLERENE; LIGHT

作者信息

通讯作者地址:

Wuhan University Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

Chinese Academy of Sciences Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

Zhengzhou University Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China.

地址:

[ 1 ]‎ Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[ 2 ]‎ Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[ 3 ]‎ Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China

电子邮件地址:min.jie@whu.edu.cn