TY - JOUR
T1 - Effect of Core Size on Performance of Fused-Ring Electron Acceptors
AU - Dai, Shuixing
AU - Xiao, Yiqun
AU - Xue, Peiyao
AU - James Rech, Jeromy
AU - Liu, Kuan
AU - Li, Zeyuan
AU - Lu, Xinhui
AU - You, Wei
AU - Zhan, Xiaowei
N1 - Funding Information:
X.Z. thank NSFC (Grants 21734001 and 51761165023). X.L. thanks the financial support from NSFC/RGC Joint Research Scheme (Grant N_CUHK418/17), Research Grant Council of Hong Kong (General Research Fund 14314216 and Theme-based Research Scheme T23-407/13-N), the beam time and technical supports provided by 23A SWAXS beamline at NSRRC, Hsinchuand BL19 beamline at SSRF, Shanghai. J.J.R. and W.Y. were supported by the National Science Foundation (Grant CBET-1639429).
Funding Information:
X.Z. thank NSFC (Grants 21734001 and 51761165023). X.L. thanks the financial support from NSFC/RGC Joint Research Scheme (Grant N-CUHK418/17) Research Grant Council of Hong Kong (General Research Fund 14314216 and Theme-based Research Scheme T23-407/13-N), the beam time and technical supports provided by 23A SWAXS beamline at NSRRC, Hsinchuand BL19 beamline at SSRF, Shanghai. J.J.R. and W.Y. were supported by the National Science Foundation (Grant CBET-1639429).
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/8/14
Y1 - 2018/8/14
N2 - We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, morphological, and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorption spectra, upshift of the energy levels, and enhancement of molecular packing and electron mobility. From 5 to 9 fused rings, the core size extension can simultaneously enhance open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF) of organic solar cells (OSCs). The best efficiency of the binary-blend devices increases from 5.6 to 11.7%, while the best efficiency of the ternary-blend devices increases from 6.3 to 12.6% as the acceptor core size extends.
AB - We report 4 fused-ring electron acceptors (FREAs) with the same end-groups and side-chains but different cores, whose sizes range from 5 to 11 fused rings. The core size has considerable effects on the electronic, optical, charge transport, morphological, and photovoltaic properties of the FREAs. Extending the core size leads to red-shift of absorption spectra, upshift of the energy levels, and enhancement of molecular packing and electron mobility. From 5 to 9 fused rings, the core size extension can simultaneously enhance open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF) of organic solar cells (OSCs). The best efficiency of the binary-blend devices increases from 5.6 to 11.7%, while the best efficiency of the ternary-blend devices increases from 6.3 to 12.6% as the acceptor core size extends.
UR - http://www.scopus.com/inward/record.url?scp=85049640723&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.8b02222
DO - 10.1021/acs.chemmater.8b02222
M3 - Journal article
AN - SCOPUS:85049640723
SN - 0897-4756
VL - 30
SP - 5390
EP - 5396
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 15
ER -
