TY - JOUR
T1 - Fluorinated biselenophene-naphthalenediimide copolymers for efficient all-polymer solar cells
AU - Shi, Shengbin
AU - Luo, Jiasi
AU - Wu, Ziang
AU - Liu, Bin
AU - Su, Mengyao
AU - Chen, Peng
AU - Zhang, Xianhe
AU - Feng, Kui
AU - Woo, Han Young
AU - Xiao, Guomin
N1 - Funding Information:
This work was financially supported by the National Key R&D Program of China (No. 2019YFB1504003 ), National Natural Science Foundation of China (No. 21676054 ), Fundamental Research Funds for the Central Universities (No. 2242018K40041 ), Scientific Research Foundation of the Graduate School of Southeast University (No. 3207049713 ), and the Big Data Center of Southeast University for providing the facility support on the calculations. H. Y. Woo gratefully acknowledges the financial support by the National Research Foundation (NRF) of Korea ( NRF-2019R1A2C2085290 , 2019R1A6A1A11044070 ).
PY - 2020/12
Y1 - 2020/12
N2 - Biselenophene (BS) is generally considered as a promising building block for constructing organic semiconductors, and the 3-positions of selenophene in BS offer a great opportunity for further structural modification. Herein, a novel fluorinated biselenophene, 3,3′-difluoro-2,2′-biselenophene (BSF), was designed and synthesized successfully, and subsequently incorporated into a polymer backbone leading to the resulting polymer PNDIBSF. The polymer backbone planarity was significantly improved via the enhanced intramolecular noncovalent Se⋯F coulombic interactions. Meanwhile, the electronic structure of the polymer was effectively tuned by the high electronegativity of F atoms. All-polymer solar cells (all-PSCs) with J71 and PNDIBSF as polymer donor and acceptor achieved power conversion efficiency (PCE) of 5.20%. In comparsion, all-PSCs based on the nonfluorinated analogue polymer acceptor (PNDIBS) had low PCE of 2.74%. The results demonstrated that BSF is a promising building block for constructing polymer acceptor in all-PSCs, and the fluorination offers a sufficient strategy for further improving performance of selenophene-based polymer semiconductors.
AB - Biselenophene (BS) is generally considered as a promising building block for constructing organic semiconductors, and the 3-positions of selenophene in BS offer a great opportunity for further structural modification. Herein, a novel fluorinated biselenophene, 3,3′-difluoro-2,2′-biselenophene (BSF), was designed and synthesized successfully, and subsequently incorporated into a polymer backbone leading to the resulting polymer PNDIBSF. The polymer backbone planarity was significantly improved via the enhanced intramolecular noncovalent Se⋯F coulombic interactions. Meanwhile, the electronic structure of the polymer was effectively tuned by the high electronegativity of F atoms. All-polymer solar cells (all-PSCs) with J71 and PNDIBSF as polymer donor and acceptor achieved power conversion efficiency (PCE) of 5.20%. In comparsion, all-PSCs based on the nonfluorinated analogue polymer acceptor (PNDIBS) had low PCE of 2.74%. The results demonstrated that BSF is a promising building block for constructing polymer acceptor in all-PSCs, and the fluorination offers a sufficient strategy for further improving performance of selenophene-based polymer semiconductors.
KW - All-polymer solar cells
KW - Fluorinated biselenophene
KW - Polymer acceptor
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U2 - 10.1016/j.dyepig.2020.108721
DO - 10.1016/j.dyepig.2020.108721
M3 - Article
AN - SCOPUS:85089544176
VL - 183
JO - Dyes and Pigments
JF - Dyes and Pigments
SN - 0143-7208
M1 - 108721
ER -