TY - JOUR
T1 - Fused Hexacyclic Nonfullerene Acceptor with Strong Near-Infrared Absorption for Semitransparent Organic Solar Cells with 9.77% Efficiency
AU - Wang, Wei
AU - Yan, Cenqi
AU - Lau, Tsz Ki
AU - Wang, Jiayu
AU - Liu, Kuan
AU - Fan, Yan
AU - Lu, Xinhui
AU - Zhan, Xiaowei
N1 - Funding Information:
W.W. and C.Y. contributed equally to this work. X.Z. wishes to thank the 973 Program (No. 2013CB834702) and the NSFC (No. 91433114). T.-K.L. and X.L. acknowledge the financial support from the RGC of Hong Kong GRF (No. 14303314) and the CUHK Direct Grant (No. 4053128). T.-K.L. and X.L. gratefully thank the beam time and technical supports provided by 14B1 and 19U2 beamlines at the Shanghai Synchrotron Radiation Facility.
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/8/18
Y1 - 2017/8/18
N2 - A fused hexacyclic electron acceptor, IHIC, based on strong electron-donating group dithienocyclopentathieno[3,2-b]thiophene flanked by strong electron-withdrawing group 1,1-dicyanomethylene-3-indanone, is designed, synthesized, and applied in semitransparent organic solar cells (ST-OSCs). IHIC exhibits strong near-infrared absorption with extinction coefficients of up to 1.6 × 105m−1 cm−1, a narrow optical bandgap of 1.38 eV, and a high electron mobility of 2.4 × 10−3 cm2 V−1 s−1. The ST-OSCs based on blends of a narrow-bandgap polymer donor PTB7-Th and narrow-bandgap IHIC acceptor exhibit a champion power conversion efficiency of 9.77% with an average visible transmittance of 36% and excellent device stability; this efficiency is much higher than any single-junction and tandem ST-OSCs reported in the literature.
AB - A fused hexacyclic electron acceptor, IHIC, based on strong electron-donating group dithienocyclopentathieno[3,2-b]thiophene flanked by strong electron-withdrawing group 1,1-dicyanomethylene-3-indanone, is designed, synthesized, and applied in semitransparent organic solar cells (ST-OSCs). IHIC exhibits strong near-infrared absorption with extinction coefficients of up to 1.6 × 105m−1 cm−1, a narrow optical bandgap of 1.38 eV, and a high electron mobility of 2.4 × 10−3 cm2 V−1 s−1. The ST-OSCs based on blends of a narrow-bandgap polymer donor PTB7-Th and narrow-bandgap IHIC acceptor exhibit a champion power conversion efficiency of 9.77% with an average visible transmittance of 36% and excellent device stability; this efficiency is much higher than any single-junction and tandem ST-OSCs reported in the literature.
KW - dithienocyclopentathieno[3,2-b]thiophene
KW - fused-ring electron acceptors
KW - near-infrared absorption
KW - nonfullerene acceptors
KW - organic solar cells
UR - http://www.scopus.com/inward/record.url?scp=85020376923&partnerID=8YFLogxK
U2 - 10.1002/adma.201701308
DO - 10.1002/adma.201701308
M3 - Journal article
C2 - 28608531
AN - SCOPUS:85020376923
SN - 0935-9648
VL - 29
JO - Advanced Materials
JF - Advanced Materials
IS - 31
M1 - 1701308
ER -