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Issue 44, 2013
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Correlating molecular morphology with optoelectronic function in solar cells based on low band-gap copolymer:fullerene blends

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Abstract

We review recent progress in the development of organic bulk heterojunction (BHJ) solar cells employing donor–acceptor copolymers as the electron-donor and fullerene derivatives as the electron-acceptor. We discuss the role of the donor and acceptor moieties, side-chains, bridging units and atomic substitutions of the copolymers on their optoelectronic functionality. The physical properties, e.g. molecular conformation, miscibility, phase-separated lateral and vertical morphology, of various photovoltaic blends prepared via solution casting and post-treatments are reviewed and correlated with photovoltaic device performance. Factors influencing the morphological stability of polymer:fullerene BHJ thin-films are briefly discussed. Finally, we address the use of thin organic interlayers to increase the efficiency of BHJ solar cells.

Graphical abstract: Correlating molecular morphology with optoelectronic function in solar cells based on low band-gap copolymer:fullerene blends

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Article information


Submitted
27 Jun 2013
Accepted
20 Sep 2013
First published
23 Sep 2013

This article is Open Access

J. Mater. Chem. C, 2013,1, 7266-7293
Article type
Feature Article

Correlating molecular morphology with optoelectronic function in solar cells based on low band-gap copolymer:fullerene blends

T. Wang, A. J. Pearson and D. G. Lidzey, J. Mater. Chem. C, 2013, 1, 7266
DOI: 10.1039/C3TC31235F

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