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Photocurrent Enhancement in Polythiophene‐ and Alkanethiol‐Modified ZnO Solar Cells
Author(s) -
Monson Todd C.,
Lloyd Matthew T.,
Olson Dana C.,
Lee YunJu,
Hsu Julia W. P.
Publication year - 2008
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.200801082
Subject(s) - photocurrent , polythiophene , materials science , exciton , monolayer , heterojunction , optoelectronics , electron transfer , solar cell , electron , nanotechnology , polymer , conductive polymer , photochemistry , chemistry , condensed matter physics , physics , composite material , quantum mechanics
Photocurrent enhancement and improvement in solar cell performance are found when the interface between ZnO and polythiophene layers is modified with insulating alkanethiol self‐assembled monolayers. This result is correlated with increased structural order in the polymer and interchain contributions in the photocurrent, suggesting that improved exciton diffusion or reduced electron‐hole recombination can outweigh the impedance in electron transfer at the heterojunction interface.