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Issue 83, 2020
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Significance of thermodynamic interaction parameters in guiding the optimization of polymer:nonfullerene solar cells

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Abstract

Polymer solar cells (PSCs) based on polymer donors and nonfullerene small molecule acceptors are a very attractive technology for solar energy conversion, and their performance is heavily determined by film morphology. It is of considerable interest to reveal instructive morphology–performance relationships of these blends. This feature article discusses the recent advances in analysing the morphology formation of nonfullerene PSCs with an effective polymer thermodynamic quantity, i.e., Flory–Huggins interaction parameter χ. In particular, guidelines of high and low χ systems are summarized. The fundamental understanding of χ and its correlations to film morphology and photovoltaic device parameters is of utmost relevance for providing essential material design criteria, establishing suitable morphology processing guidelines, and thus advancing the practical applications of PSCs based on nonfullerene acceptors.

Graphical abstract: Significance of thermodynamic interaction parameters in guiding the optimization of polymer:nonfullerene solar cells

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Article information


Submitted
15 Jul 2020
Accepted
28 Aug 2020
First published
28 Aug 2020

Chem. Commun., 2020,56, 12463-12478
Article type
Feature Article

Significance of thermodynamic interaction parameters in guiding the optimization of polymer:nonfullerene solar cells

M. Gao, Z. Liang, Y. Geng and L. Ye, Chem. Commun., 2020, 56, 12463
DOI: 10.1039/D0CC04869K

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