Two similar near-infrared (IR) non-fullerene acceptors as near IR sensitizers for ternary solar cells

作者:Shi, MM (Shi, Mumin)[ 1 ] ; Sun, R (Sun, Rui)[ 1 ] ; Wang, T (Wang, Tao)[ 1,2 ] ; Luo, ZH (Luo, Zhenghui)[ 4 ] ; Guo, J (Guo, Jing)[ 1 ] ; Guo, J (Guo, Jie)[ 1 ] ; Yang, CL (Yang, Chuluo)[ 3,4 ] ; Min, J (Min, Jie)[ 1,2,5 ]

ORGANIC ELECTRONICS

卷: 85

文献号: 105880

DOI: 10.1016/j.orgel.2020.105880

出版年:OCT 2020

文献类型:Article

摘要

In this work we introduced and constructed two different ternary solar cells based on J101:MeIC host films separately blended with two distinct near-IR non-fullerene acceptors, F-IXIC and Cl-IXIC. The J101:MeIC host devices with a PCE of 11.83% were improved to 14.08% by loading 40 wt% F-IXIC, but reduced to 9.32% by loading Cl-IXIC with the same content. Notably, the J101:F-IXIC and J101:Cl-IXIC binary devices showed the comparable PCEs of 9.44% and 9.45%, respectively. Importantly, the large difference of fill factor values (70.19% for F-IXIC-based device and 50.24% for Cl-IXIC-based device) drives us to carefully analyze the working mechanisms and morphological characteristics of these two ternary systems via the physical and morphological measurements and the surface energy calculations. The investigated results suggest that the interfacial surface energy parameters of the third component and host materials should be rationally and comprehensively considered in the design of ternary systems. More importantly, combining with the investigations of the photoand thermal-stability issues of the corresponding ternary systems, we further found that localization driving force of sensitizers partially explained in terms of surface energy can rationally control the efficiency-stability gap of ternary solar cells.

关键词

作者关键词:Ternary solar cells; Non-fullerene acceptor; Surface energy; Energy transfer; Stability

KeyWords Plus:POWER CONVERSION EFFICIENCY; PERFORMANCE; MORPHOLOGY; STABILITY

作者信息

通讯作者地址:

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

Shenzhen University Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, 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: Yang, CL (通讯作者)

Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China.

地址:

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

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

[ 3 ]‎ Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China

[ 4 ]‎ Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China

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

电子邮件地址:clyang@whu.edu.cn; min.jie@whu.edu.cn