Morphological stability and performance of polymer-fullerene solar cells under thermal stress: The impact of photoinduced PC60BM oligomerization

Him Cheng Wong; Zhe Li; Ching Hong Tan; Hongliang Zhong; Zhenggang Huang; Hugo Bronstein; Iain McCulloch; João T. Cabral; James R. Durrant

doi:10.1021/nn404687s

Morphological stability and performance of polymer-fullerene solar cells under thermal stress: The impact of photoinduced PC60BM oligomerization

Him Cheng Wong, Zhe Li, Ching Hong Tan, Hongliang Zhong, Zhenggang Huang, Hugo Bronstein, Iain McCulloch, João T. Cabral, James R. Durrant

Research output: Contribution to journal › Article › peer-review

125 Scopus citations

Abstract

We report a general light processing strategy for organic solar cells (OSC) that exploits the propensity of the fullerene derivative PC60BM to photo-oligomerize, which is capable of both stabilizing the polymer:PC 60BM active layer morphology and enhancing the device stability under thermal annealing. The observations hold for blends of PC60BM with an array of benchmark donor polymer systems, including P3HT, DPP-TT-T, PTB7, and PCDTBT. The morphology and kinetics of the thermally induced PC60BM crystallization within the blend films are investigated as a function of substrate and temperature. PC60BM nucleation rates on SiOx substrates exhibit a pronounced peak profile with temperature, whose maximum is polymer and blend-composition dependent. Modest illumination (

Original language	English (US)
Pages (from-to)	1297-1308
Number of pages	12
Journal	ACS Nano
Volume	8
Issue number	2
DOIs	https://doi.org/10.1021/nn404687s
State	Published - Feb 25 2014
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
General Materials Science
General Engineering

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10.1021/nn404687s

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abstract = "We report a general light processing strategy for organic solar cells (OSC) that exploits the propensity of the fullerene derivative PC60BM to photo-oligomerize, which is capable of both stabilizing the polymer:PC 60BM active layer morphology and enhancing the device stability under thermal annealing. The observations hold for blends of PC60BM with an array of benchmark donor polymer systems, including P3HT, DPP-TT-T, PTB7, and PCDTBT. The morphology and kinetics of the thermally induced PC60BM crystallization within the blend films are investigated as a function of substrate and temperature. PC60BM nucleation rates on SiOx substrates exhibit a pronounced peak profile with temperature, whose maximum is polymer and blend-composition dependent. Modest illumination (",

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AU - Wong, Him Cheng

AU - Li, Zhe

AU - Tan, Ching Hong

AU - Zhong, Hongliang

AU - Huang, Zhenggang

AU - Bronstein, Hugo

AU - McCulloch, Iain

AU - Cabral, João T.

AU - Durrant, James R.

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Morphological stability and performance of polymer-fullerene solar cells under thermal stress: The impact of photoinduced PC60BM oligomerization

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