High-Performance Ternary Semitransparent Polymer Solar Cells with Different Bandgap Third Component as Non-Fullerene Guest Acceptor

作者：Wang, Xiangkun; Zhai, Xiaohua; Kang, Xiao; Ding, Xiqiang; Gao, Caiyun; Jing, Xin; Yu, Liangmin; Sun, Mingliang^*

来源：Solar RRL, 2022, 6(7): 2200070.

DOI：10.1002/solr.202200070

• average visible transmittance
• non-fullerene guest-acceptors
• semitransparent polymer solar cells
• ternary blends

Ternary semitransparent polymer solar cells (ST-PSCs) have great potential to simultaneously improve the power conversion efficiency (PCE) and average visible transmittance (AVT). Non-fullerene acceptor I HIC was synthesized by a simple one-step process under low cost and had an A-D-A structure similar to ITIC and IT-4F. Ternary device based on PM6:Y6:IHIC (20%) demonstrated higher hole and electron mobility (2.78, 3.12 x 10(-4) CM2 V-1 S-1) and more balanced charge transport properties (mu(e)/mu(h) = 1.12) than the host binary device, and the ternary ST-PSC demonstrated a PCE of 12.18% and AVT of 27.07%. Ternary PSCs with 20% ITIC or IT-4F also exhibited more balanced mu(e)/mu(h) ratios (1.31 and 0.85), but with slightly enhanced short-current circuit density (J(SC)) and reduced AVT (23-24%), mainly owing to unavoidable absorption of third component in the visible region. Our conclusion in this work was that the little A-D-A non-fullerene acceptor could improve ternary blend film morphology and charge transport channels and enhanced J sc and PCE, and PM6:Y6:IHIC (20%) with high AVT over 27% and PCE over 12% was more suitable in ST-PSCs than PM6:Y6:ITIC/IT-4F (20%).

• 单位
  中国海洋大学