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Overcoming Geminate Recombination and Enhancing Extraction in Solution‐Processed Small Molecule Solar Cells
Author(s) -
Proctor Christopher M.,
Albrecht Steve,
Kuik Martijn,
Neher Dieter,
Nguyen ThucQuyen
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201400230
Subject(s) - recombination , materials science , chemical physics , solar cell , charge carrier , molecule , charge (physics) , extraction (chemistry) , small molecule , optoelectronics , chemistry , physics , biochemistry , organic chemistry , quantum mechanics , gene , chromatography
The effects of processing conditions on charge transport and voltage dependent recombination losses in one of the most efficient solution‐processed small molecule solar cell systems reported to date are studied. With careful control of the blend film morphology, geminate recombination (GR) can be completely overcome while reducing bimolecular recombination (BMR) to allow for efficient generation and collection of photogenerated charge carriers. These results highlight that a field‐dependent generation mechanism is not necessarily an inherent molecular property.