TY - JOUR
T1 - Asymmetric A-D-π-A-type nonfullerene small molecule acceptors for efficient organic solar cells
AU - Li, Xueshan
AU - Li, Chao
AU - Ye, Linglong
AU - Weng, Kangkang
AU - Fu, Huiting
AU - Ryu, Hwa Sook
AU - Wei, Donghui
AU - Sun, Xiaobo
AU - Woo, Han Young
AU - Sun, Yanming
N1 - Funding Information:
This work was nancially supported by the National Natural Science Foundation of China (NSFC) (Grant No. 21734001, 21674007, and 51825301). HYW is grateful for the nancial support from the National Research Foundation (NRF) of Korea (2012M3A6A7055540 and 2015M1A2A2057506).
Funding Information:
This work was financially supported by the National Natural Science Foundation of China (NSFC) (Grant No. 21734001, 21674007, and 51825301). HYW is grateful for the financial support from the National Research Foundation (NRF) of Korea (2012M3A6A7055540 and 2015M1A2A2057506).
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - There has been significant progress with regard to research on nonfullerene small molecule acceptors (SMAs) during the past several years. Typically, high-performance nonfullerene SMAs are based on symmetric A-D-A or A-π-D-π-A structural frameworks. In this study, a novel asymmetric nonfullerene SMA, TTPT-T-2F, with an A-D-π-A structure is rationally designed and synthesized. In addition, a symmetric A-D-A-type nonfullerene SMA, IT-2F, and a symmetric A-π-D-π-A-type nonfullerene SMA, T-TPT-T-2F, are also synthesized for comparison. When PBT1-C is employed as a polymer donor, a promising power conversion efficiency (PCE) of 12.71% is achieved for TTPT-T-2F-based organic solar cells (OSCs), which surpasses those of devices based on IT-2F (PCE = 10.54%) and T-TPT-T-2F (PCE = 10.71%). Favorable phase separation toward efficient and more balanced charge transport accounts for the higher PCE achieved in the PBT1-C:TTPT-T-2F device. Our results demonstrate that a small molecule acceptor with an A-D-π-A structural framework is a promising class of nonfullerene acceptors for OSCs.
AB - There has been significant progress with regard to research on nonfullerene small molecule acceptors (SMAs) during the past several years. Typically, high-performance nonfullerene SMAs are based on symmetric A-D-A or A-π-D-π-A structural frameworks. In this study, a novel asymmetric nonfullerene SMA, TTPT-T-2F, with an A-D-π-A structure is rationally designed and synthesized. In addition, a symmetric A-D-A-type nonfullerene SMA, IT-2F, and a symmetric A-π-D-π-A-type nonfullerene SMA, T-TPT-T-2F, are also synthesized for comparison. When PBT1-C is employed as a polymer donor, a promising power conversion efficiency (PCE) of 12.71% is achieved for TTPT-T-2F-based organic solar cells (OSCs), which surpasses those of devices based on IT-2F (PCE = 10.54%) and T-TPT-T-2F (PCE = 10.71%). Favorable phase separation toward efficient and more balanced charge transport accounts for the higher PCE achieved in the PBT1-C:TTPT-T-2F device. Our results demonstrate that a small molecule acceptor with an A-D-π-A structural framework is a promising class of nonfullerene acceptors for OSCs.
UR - http://www.scopus.com/inward/record.url?scp=85071170433&partnerID=8YFLogxK
U2 - 10.1039/c9ta06476a
DO - 10.1039/c9ta06476a
M3 - Article
AN - SCOPUS:85071170433
SN - 2050-7488
VL - 7
SP - 19348
EP - 19354
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 33
ER -
