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 journalArticlepeer-review

122 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 languageEnglish (US)
Pages (from-to)1297-1308
Number of pages12
JournalACS Nano
Volume8
Issue number2
DOIs
StatePublished - Feb 25 2014
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-21

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Materials Science
  • General Engineering

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