TY - JOUR
T1 - Enhancing Open-Circuit Voltage of High-Efficiency Nonfullerene Ternary Solar Cells with a Star-Shaped Acceptor
AU - Cai, Guilong
AU - Li, Yuhao
AU - Zhou, Jiadong
AU - Xue, Peiyao
AU - Liu, Kuan
AU - Wang, Jiayu
AU - Xie, Zengqi
AU - Li, Gang
AU - Zhan, Xiaowei
AU - Lu, Xinhui
N1 - Funding Information:
G.C. and X.L. acknowledge the financial support from the UGC/RGC fund (Project no. JLFS/P-102/18) and the NSFC/RGC Joint Research Scheme (Grant no. N_CUHK418/17). X.Z. thanks the NSFC (51761165023). Z.X. thanks the financial support from the NSFC (21733005 and 51761135101). G.L. thanks the support from the UGC/RGC fund (Project nos. 15218517 and C5037-18G).
Publisher Copyright:
© 2020 American Chemical Society. All rights reserved.
PY - 2020/11/11
Y1 - 2020/11/11
N2 - The ternary strategy has been widely used in high-efficiency organic solar cells (OSCs). Herein, we successfully incorporated a mid-band-gap star-shaped acceptor, FBTIC, as the third component into the PM6/Y6 binary blend film, which not only achieved a panchromatic absorption but also significantly improved the open-circuit voltage (VOC) of the devices due to the high-lying lowest unoccupied molecular orbital (LUMO) of the FBTIC. Morphology characterizations show that star-shaped FBTIC molecules are amorphously distributed in the ternary system, and the finely tuned ternary film morphology facilitates the exciton dissociation and charge collection in ternary devices. As a result, the best PM6/Y6/FBTIC-based ternary OSCs achieved a power conversion efficiency (PCE) of 16.7% at a weight ratio of 1.0:1.0:0.2.
AB - The ternary strategy has been widely used in high-efficiency organic solar cells (OSCs). Herein, we successfully incorporated a mid-band-gap star-shaped acceptor, FBTIC, as the third component into the PM6/Y6 binary blend film, which not only achieved a panchromatic absorption but also significantly improved the open-circuit voltage (VOC) of the devices due to the high-lying lowest unoccupied molecular orbital (LUMO) of the FBTIC. Morphology characterizations show that star-shaped FBTIC molecules are amorphously distributed in the ternary system, and the finely tuned ternary film morphology facilitates the exciton dissociation and charge collection in ternary devices. As a result, the best PM6/Y6/FBTIC-based ternary OSCs achieved a power conversion efficiency (PCE) of 16.7% at a weight ratio of 1.0:1.0:0.2.
KW - fused-ring electron acceptor
KW - nonfullerene acceptor
KW - organic solar cell
KW - star-shaped acceptor
KW - ternary
UR - http://www.scopus.com/inward/record.url?scp=85096021530&partnerID=8YFLogxK
U2 - 10.1021/acsami.0c14612
DO - 10.1021/acsami.0c14612
M3 - Journal article
C2 - 33112591
AN - SCOPUS:85096021530
SN - 1944-8244
VL - 12
SP - 50660
EP - 50667
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 45
ER -