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Atomic Pathways Underlying Light-Induced Changes in Organic Solar Cell Materials

TitleAtomic Pathways Underlying Light-Induced Changes in Organic Solar Cell Materials
Publication TypeJournal Article
Year of Publication2015
AuthorsShah, S, Biswas, R
JournalJournal of Physical Chemistry C
Volume119
Pagination20265-20271
Date Published09
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000360947800005
Keywordsamorphous-silicon, low-bandgap polymer, molecule, power conversion efficiency
Abstract

= 2.65 eV can be surmounted with blue photons. Local H motion from beta C to alpha C within the alkyl, also generates a C-dangling bond, a similar rebonding of bridging-O, and cleaving of PTB7. Bridging O creates instability. Defect energies are lowered by similar to 0.5 eV by excited electronic states. Defects can anneal reversibly or irreversibly to distorted configurations. We identify why certain organic materials are more stable, and pathways to design more stable materials.

DOI10.1021/acs.jpcc.5b05234
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Photonics