TY - JOUR
T1 - Effects of linking units on fused-ring electron acceptor dimers
AU - Cai, Guilong
AU - Xiao, Yiqun
AU - Li, Mengyang
AU - Rech, Jeromy James
AU - Wang, Jiayu
AU - Liu, Kuan
AU - Lu, Xinhui
AU - Tang, Zheng
AU - Lian, Jiarong
AU - Zeng, Pengju
AU - Wang, Yiping
AU - You, Wei
AU - Zhan, Xiaowei
N1 - Funding Information:
X. Z. wish to thank NSFC (21734001 and 51761165023). X. L. acknowledges the nancial support from NSFC/RGC Joint Research Scheme (Grant No. N_CUHK418/17). J. J. R. and W. Y. thank the NSF (CBET-1639429) for nancial support. J. L. thanks Natural Science Foundation of Guangdong Province (Grant No. 2019A1515011125) and Science and Technology Project of Shenzhen City (Grant No. JCYJ20190808173813204). The Supercomputing Center of Chinese Academy of Sciences is acknowledged for molecular modeling.
Publisher Copyright:
© 2020 The Royal Society of Chemistry.
PY - 2020/7/21
Y1 - 2020/7/21
N2 - Three fused-ring electron acceptors (SIDIC, DIDIC and TIDIC) were designed and synthesized using single bond, vinylene and acetylene units linked indaceno[3,2-b]dithiophene dimers as electron-rich cores and 3-(1,1-dicyanomethylene)-5,6-difluoro-1-indanone as electron-deficient termini. These molecules exhibit strong absorption from 550 to 900 nm with large attenuation coefficients of 1.8-2.0 × 105 M-1 cm-1 and high electron mobilities of 2.2-4.9 × 10-3 cm2 V-1 s-1. In combination with wide-bandgap polymer FTAZ as a donor, organic solar cells exhibit efficiencies of 9.3-13.1%. Effects of the linking units on optical, electronic, morphologic, and photovoltaic properties were revealed. Relative to SIDIC, vinylene-bridged DIDIC shows red-shifted absorption, while acetylene-bridged TIDIC shows blue-shifted absorption. Compared with SIDIC and DIDIC, TIDIC has a lower HOMO, higher electron mobility, and higher device efficiency.
AB - Three fused-ring electron acceptors (SIDIC, DIDIC and TIDIC) were designed and synthesized using single bond, vinylene and acetylene units linked indaceno[3,2-b]dithiophene dimers as electron-rich cores and 3-(1,1-dicyanomethylene)-5,6-difluoro-1-indanone as electron-deficient termini. These molecules exhibit strong absorption from 550 to 900 nm with large attenuation coefficients of 1.8-2.0 × 105 M-1 cm-1 and high electron mobilities of 2.2-4.9 × 10-3 cm2 V-1 s-1. In combination with wide-bandgap polymer FTAZ as a donor, organic solar cells exhibit efficiencies of 9.3-13.1%. Effects of the linking units on optical, electronic, morphologic, and photovoltaic properties were revealed. Relative to SIDIC, vinylene-bridged DIDIC shows red-shifted absorption, while acetylene-bridged TIDIC shows blue-shifted absorption. Compared with SIDIC and DIDIC, TIDIC has a lower HOMO, higher electron mobility, and higher device efficiency.
UR - http://www.scopus.com/inward/record.url?scp=85089551432&partnerID=8YFLogxK
U2 - 10.1039/d0ta03058a
DO - 10.1039/d0ta03058a
M3 - Journal article
AN - SCOPUS:85089551432
SN - 2050-7488
VL - 8
SP - 13735
EP - 13741
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 27
ER -
