TY - JOUR
T1 - Fused octacyclic electron acceptor isomers for organic solar cells
AU - Cai, Guilong
AU - Zhu, Jingshuai
AU - Xiao, Yiqun
AU - Li, Mengyang
AU - Liu, Kuan
AU - Wang, Jiayu
AU - Wang, Wei
AU - Lu, Xinhui
AU - Tang, Zheng
AU - Lian, Jiarong
AU - Zeng, Pengju
AU - Wang, Yiping
AU - Zhan, Xiaowei
N1 - Funding Information:
X. Z. thanks the NSFC (51761165023 and 21734001). X. L. acknowledges the nancial support from the NSFC/RGC Joint Research Scheme (Grant No. N_CUHK418/17). The Supercomputing Center of Chinese Academy of Sciences is acknowledged for molecular modeling.
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - We extend thieno[3,2-b]thiophene and naphthalene cores in our previously reported fused-ring electron acceptors (FREAs) F6IC and IHIC2 to benzo[b]benzo[4,5]thieno[2,3-d]thiophene and naphtho[1,2-b:5,6-b′]dithiophene, respectively, and synthesize two new isomeric FREAs BTIC and NTIC. Both BTIC and NTIC exhibit strong absorption from 500 to 800 nm with high extinction coefficients (2.4-2.6 × 105 M-1 cm-1) and electron mobilities of 1.8-3.4 × 10-4 cm2 V-1 s-1. Paired with the polymer donor PM6, the BTIC and NTIC-based organic solar cells (OSCs) show power conversion efficiencies (PCEs) of 11.5-12.2%, much higher than those of the control devices based on IHIC2 and F6IC (7.21-7.31%). The PM6/NTIC-based OSCs afford a higher PCE of 12.2% than PM6/BTIC-based OSCs (11.5%), due to the red-shifted absorption and up-shifted HOMO of NTIC.
AB - We extend thieno[3,2-b]thiophene and naphthalene cores in our previously reported fused-ring electron acceptors (FREAs) F6IC and IHIC2 to benzo[b]benzo[4,5]thieno[2,3-d]thiophene and naphtho[1,2-b:5,6-b′]dithiophene, respectively, and synthesize two new isomeric FREAs BTIC and NTIC. Both BTIC and NTIC exhibit strong absorption from 500 to 800 nm with high extinction coefficients (2.4-2.6 × 105 M-1 cm-1) and electron mobilities of 1.8-3.4 × 10-4 cm2 V-1 s-1. Paired with the polymer donor PM6, the BTIC and NTIC-based organic solar cells (OSCs) show power conversion efficiencies (PCEs) of 11.5-12.2%, much higher than those of the control devices based on IHIC2 and F6IC (7.21-7.31%). The PM6/NTIC-based OSCs afford a higher PCE of 12.2% than PM6/BTIC-based OSCs (11.5%), due to the red-shifted absorption and up-shifted HOMO of NTIC.
UR - http://www.scopus.com/inward/record.url?scp=85072674181&partnerID=8YFLogxK
U2 - 10.1039/c9ta06362e
DO - 10.1039/c9ta06362e
M3 - Journal article
AN - SCOPUS:85072674181
SN - 2050-7488
VL - 7
SP - 21432
EP - 21437
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 37
ER -
