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An Organic Surface Modifier to Produce a High Work Function Transparent Electrode for High Performance Polymer Solar Cells
Author(s) -
Choi Hyosung,
Kim HakBeom,
Ko SeoJin,
Kim Jin Young,
Heeger Alan J.
Publication year - 2015
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.201404172
Subject(s) - materials science , pedot:pss , organic solar cell , electrode , work function , active layer , layer (electronics) , surface modification , coating , anode , polymer , optoelectronics , chemical engineering , nanotechnology , composite material , chemistry , thin film transistor , engineering
Modification of an ITO electrode with small‐molecule organic surface modifier, 4‐chlorobenzoic acid (CBA), via a simple spin‐coating method produces a high‐work‐function electrode with high transparency and a hydrophobic surface. As an alternative to PEDOT:PSS, CBA modification achieves efficiency enhancement up to 8.5%, which is attributed to enhanced light absorption within the active layer and smooth hole transport from the active layer to the anode.