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Improving Device Efficiency of Polymer/Fullerene Bulk Heterojunction Solar Cells Through Enhanced Crystallinity and Reduced Grain Boundaries Induced by Solvent Additives
Author(s) -
Su MingShin,
Kuo ChihYin,
Yuan MaoChuan,
Jeng USer,
Su ChunJen,
Wei KungHwa
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201101274
Subject(s) - crystallinity , materials science , fullerene , polymer , solvent , chemical engineering , grain boundary , grain size , energy conversion efficiency , nanotechnology , optoelectronics , organic chemistry , composite material , chemistry , engineering , microstructure
The power conversion efficiency of a device incorporating a crystalline polymer/fullerene thin film improves from 5% to 7.3% – a relative increase of 45% – when an additive, diiodohexane (DIH), is present during processing. The DIH‐processed active layer exhibits substantially enhanced polymer crystallinity and smaller fractal‐like fullerene clusters.