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Issue 31, 2016
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The effect of fluorination on the photovoltaic performance of the D–A copolymers containing naphtho[2,3-c]thiophene-4,9-dione and bithiophene moieties

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Abstract

Four D–A copolymers, PNTDBT, PFNTDBT, PNTDFBT and PFNTDFBT, were prepared for systematically studying the effect of fluorination on photovoltaic performance. The fluorinated copolymers, PFNTDBT, PNTDFBT and PFNTDFBT, gave higher FF (∼70%) than PNTDBT due to their reduced bimolecular recombination and balanced mobilities. PNTDFBT with F on the BT unit shows a higher mobility than that of PFNTDBT with F on the NTD unit, leading to a higher Jsc. PFNTDFBT gave the highest PCE, 7.79%, which might result from its higher mobility and the optimal miscibility between PFNTDFBT and PC71BM.

Graphical abstract: The effect of fluorination on the photovoltaic performance of the D–A copolymers containing naphtho[2,3-c]thiophene-4,9-dione and bithiophene moieties

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Supplementary files

Article information


Submitted
21 May 2016
Accepted
12 Jul 2016
First published
13 Jul 2016

Polym. Chem., 2016,7, 4993-4997
Article type
Communication

The effect of fluorination on the photovoltaic performance of the D–A copolymers containing naphtho[2,3-c]thiophene-4,9-dione and bithiophene moieties

D. He, X. Geng and L. Ding, Polym. Chem., 2016, 7, 4993
DOI: 10.1039/C6PY00883F

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