TY - JOUR
T1 - Low-bandgap nonfullerene acceptor based on thieno[3,2-b]indole core for highly efficient binary and ternary organic solar cells
AU - Xie, Liang
AU - Zhang, Yang
AU - Zhuang, Wenliu
AU - Jeong, Sang Young
AU - Bian, Qingzhen
AU - Li, Huangfen
AU - Cao, Jiamin
AU - Liu, Wanqing
AU - Tan, Hua
AU - Woo, Han Young
AU - Zhang, Jian
AU - Wang, Ergang
N1 - Funding Information:
L.X., Y.Z. and W.Z. contributed equally to this work. J.C. acknowledges financial support from the National Natural Science Foundation of China (21604021), China Scholarship Council (CSC, 201808430041), Hunan Provincial Natural Science Foundation (2018JJ3141), School of Materials Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications (GDRGCS2020005). J. Z. acknowledges the support from the National Natural Science Foundation of China (61774050), Guangxi Natural Science Foundation Program (2019GXNSFGA245005), the Project (2020ZYZX2005), and the Bagui Scholars Program of Guangxi. E.W. thanks the Swedish Research Council (2016-06146, 2019-02345), the Swedish Research Council Formas, and the Wallenberg Foundation (2017.0186, 2016.0059) for financial support. W.Z. appreciates support from the China Scholarship Council (201908440047), NSFC project (11272093), Guangzhou Municipal Science and Technology Bureau (201804010501, 202002030362), Department of Education of Guangdong Province (2018GKTSCX041), and the Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology, 2020-skllmd-07). H.Y.W. acknowledges the financial support from the National Research Foundation (NRF) of Korea (2019R1A6A1A11044070, 2020M3H4A3081814). H.T. acknowledges financial support from the Natural Science Foundation of the Jiangsu Higher Institutions of China (20KJA480004).
Publisher Copyright:
© 2021 The Author(s)
PY - 2022/1/1
Y1 - 2022/1/1
N2 - A low-bandgap nonfullerene acceptor (NFA) TIT-2FIC based on thieno[3,2-b]indole-thiophenes core has been developed. Compared with the analogue NFAs DTC(4Ph)-4FIC and IT-4F, TIT-2FIC exhibited remarkably red-shifted absorption, and up-shifted HOMO energy level. In addition, TIT-2FIC showed interesting universal miscibility with the donors nonfluorinated PBDB-T and fluorinated PM6, therefore the corresponding organic solar cells achieved promising power conversion efficiencies (PCEs) of 11.80% and 13.00%, respectively, which are higher compared to the counterpart IT-4F based cells. Furthermore, the ternary PM6:TIT-2FIC:Y6 cell pronounced a high PCE of 17.22%, being significantly improved from that of 16.04% for the binary PM6:Y6 cell. Similar improvement in PCEs from 13.41% to 14.46% was also observed in the ternary PM6:TIT-2FIC:IT-4F cell with TIT-2FIC as the third component. These results indicated that TIT-2FIC is universally applicable as an acceptor with nonfluorinated or fluorinated polymer donor materials in both binary and ternary cells.
AB - A low-bandgap nonfullerene acceptor (NFA) TIT-2FIC based on thieno[3,2-b]indole-thiophenes core has been developed. Compared with the analogue NFAs DTC(4Ph)-4FIC and IT-4F, TIT-2FIC exhibited remarkably red-shifted absorption, and up-shifted HOMO energy level. In addition, TIT-2FIC showed interesting universal miscibility with the donors nonfluorinated PBDB-T and fluorinated PM6, therefore the corresponding organic solar cells achieved promising power conversion efficiencies (PCEs) of 11.80% and 13.00%, respectively, which are higher compared to the counterpart IT-4F based cells. Furthermore, the ternary PM6:TIT-2FIC:Y6 cell pronounced a high PCE of 17.22%, being significantly improved from that of 16.04% for the binary PM6:Y6 cell. Similar improvement in PCEs from 13.41% to 14.46% was also observed in the ternary PM6:TIT-2FIC:IT-4F cell with TIT-2FIC as the third component. These results indicated that TIT-2FIC is universally applicable as an acceptor with nonfluorinated or fluorinated polymer donor materials in both binary and ternary cells.
KW - Frontier energy levels
KW - Nonfullerene acceptors
KW - Organic solar cells
KW - Power conversion efficiency
KW - Thieno[3,2-b]indole
UR - http://www.scopus.com/inward/record.url?scp=85113188069&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2021.131674
DO - 10.1016/j.cej.2021.131674
M3 - Article
AN - SCOPUS:85113188069
VL - 427
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
M1 - 131674
ER -