TY - JOUR
T1 - Fused Benzothiadiazole
T2 - A Building Block for n-Type Organic Acceptor to Achieve High-Performance Organic Solar Cells
AU - Yuan, Jun
AU - Zhang, Yunqiang
AU - Zhou, Liuyang
AU - Zhang, Chujun
AU - Lau, Tsz Ki
AU - Zhang, Guichuan
AU - Lu, Xinhui
AU - Yip, Hin Lap
AU - So, Shu Kong
AU - Beaupré, Serge
AU - Mainville, Mathieu
AU - Johnson, Paul A.
AU - Leclerc, Mario
AU - Chen, Honggang
AU - Peng, Hongjian
AU - Li, Yongfang
AU - Zou, Yingping
N1 - Funding Information:
J.Y., Y.Z., and L.Z. contributed equally to this work. Y.Z. acknowledges the National Natural Science Foundation of China (NSFC) (21875286), the National Key Research & Development Projects of China (2017YFA0206600), and Science Fund for Distinguished Young Scholars of Hunan Province (2017JJ1029). Y.L. acknowledges financial support from NSFC (91633301). H.Y. acknowledges NSFC (21761132001 and 91633301). X.L. acknowledges financial support from CUHK direct grant and NSFC/RGC Joint Research Scheme (Grant No. N_CUHK418/17). P.A.J. and M.L. acknowledge financial support from NSERC, CIFAR, and Sentinelle Nord. This research was enabled in part by Calcul Québec, Compute Ontario, SHARCNET, and Compute Canada.
PY - 2019/4/25
Y1 - 2019/4/25
N2 - Narrow bandgap n-type organic semiconductors (n-OS) have attracted great attention in recent years as acceptors in organic solar cells (OSCs), due to their easily tuned absorption and electronic energy levels in comparison with fullerene acceptors. Herein, a new n-OS acceptor, Y5, with an electron-deficient-core-based fused structure is designed and synthesized, which exhibits a strong absorption in the 600–900 nm region with an extinction coefficient of 1.24 × 10 5 cm −1 , and an electron mobility of 2.11 × 10 −4 cm 2 V −1 s −1 . By blending Y5 with three types of common medium-bandgap polymers (J61, PBDB-T, and TTFQx-T1) as donors, all devices exhibit high short-circuit current densities over 20 mA cm −2 . As a result, the power conversion efficiency of the Y5-based OSCs with J61, TTFQx-T1, and PBDB-T reaches 11.0%, 13.1%, and 14.1%, respectively. This indicates that Y5 is a universal and highly efficient n-OS acceptor for applications in organic solar cells.
AB - Narrow bandgap n-type organic semiconductors (n-OS) have attracted great attention in recent years as acceptors in organic solar cells (OSCs), due to their easily tuned absorption and electronic energy levels in comparison with fullerene acceptors. Herein, a new n-OS acceptor, Y5, with an electron-deficient-core-based fused structure is designed and synthesized, which exhibits a strong absorption in the 600–900 nm region with an extinction coefficient of 1.24 × 10 5 cm −1 , and an electron mobility of 2.11 × 10 −4 cm 2 V −1 s −1 . By blending Y5 with three types of common medium-bandgap polymers (J61, PBDB-T, and TTFQx-T1) as donors, all devices exhibit high short-circuit current densities over 20 mA cm −2 . As a result, the power conversion efficiency of the Y5-based OSCs with J61, TTFQx-T1, and PBDB-T reaches 11.0%, 13.1%, and 14.1%, respectively. This indicates that Y5 is a universal and highly efficient n-OS acceptor for applications in organic solar cells.
KW - electron-deficient core
KW - fused benzothiadiazole
KW - nonfullerene acceptors
KW - organic photovoltaics
KW - power conversion efficiency
UR - http://www.scopus.com/inward/record.url?scp=85064570273&partnerID=8YFLogxK
U2 - 10.1002/adma.201807577
DO - 10.1002/adma.201807577
M3 - Journal article
C2 - 30883937
AN - SCOPUS:85064570273
SN - 0935-9648
VL - 31
JO - Advanced Materials
JF - Advanced Materials
IS - 17
M1 - 1807577
ER -
