TY - JOUR
T1 - Z-Shaped Fused-Chrysene Electron Acceptors for Organic Photovoltaics
AU - Lu, Bing
AU - Xiao, Yiqun
AU - Li, Tengfei
AU - Liu, Kuan
AU - Lu, Xinhui
AU - Lian, Jiarong
AU - Zeng, Pengju
AU - Qu, Junle
AU - Zhan, Xiaowei
N1 - Funding Information:
X.Z. thanks the NSFC (Nos. 51761165023 and 21734001). Y.X. and X.L. thank the financial support from NSFC/RGC Joint Research Scheme (Grant no. N_CUHK418/17).
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/9/11
Y1 - 2019/9/11
N2 - A new fused-chrysene electron-donating core is synthesized, where chrysene is condensed with two thiophenes via two dihydrobenzene rings. Based on this building block coupled with two electron-accepting end groups of 1,1-dicyanomethylene-3-indanone, a new Z-shaped fused-ring electron acceptor, FCIC, is designed and synthesized. FCIC shows intense absorption in the 500-850 nm region, with a maximum molar absorptivity of 1.5 × 105 M-1 cm-1, a bandgap of 1.50 eV, and a charge mobility of 2.5 × 10-4 cm2 V-1 s-1. The ternary organic photovoltaic cells based on PTB7-Th/F8IC/FCIC yield an efficiency of 12.6%, higher than that of the binary cells of PTB7-Th/F8IC (10.7%) and PTB7-Th/FCIC (7.21%). Relative to the PTB7-Th/F8IC binary blend, the addition of FCIC leads to improvement in the open-circuit voltage, short-circuit current, and fill factor.
AB - A new fused-chrysene electron-donating core is synthesized, where chrysene is condensed with two thiophenes via two dihydrobenzene rings. Based on this building block coupled with two electron-accepting end groups of 1,1-dicyanomethylene-3-indanone, a new Z-shaped fused-ring electron acceptor, FCIC, is designed and synthesized. FCIC shows intense absorption in the 500-850 nm region, with a maximum molar absorptivity of 1.5 × 105 M-1 cm-1, a bandgap of 1.50 eV, and a charge mobility of 2.5 × 10-4 cm2 V-1 s-1. The ternary organic photovoltaic cells based on PTB7-Th/F8IC/FCIC yield an efficiency of 12.6%, higher than that of the binary cells of PTB7-Th/F8IC (10.7%) and PTB7-Th/FCIC (7.21%). Relative to the PTB7-Th/F8IC binary blend, the addition of FCIC leads to improvement in the open-circuit voltage, short-circuit current, and fill factor.
KW - chrysene
KW - fused-ring electron acceptor
KW - nonfullerene acceptor
KW - organic photovoltaic
KW - Z-shaped
UR - http://www.scopus.com/inward/record.url?scp=85072056520&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b10834
DO - 10.1021/acsami.9b10834
M3 - Journal article
C2 - 31414589
AN - SCOPUS:85072056520
SN - 1944-8244
VL - 11
SP - 33006
EP - 33011
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 36
ER -