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Controlling Surface Enrichment in Polymeric Hole Extraction Layers to Achieve High‐Efficiency Organic Photovoltaic Cells
Author(s) -
Kim DongHun,
Lim KyungGeun,
Park Jong Hyeok,
Lee TaeWoo
Publication year - 2012
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201200202
Subject(s) - extraction (chemistry) , photovoltaic system , materials science , photoactive layer , layer (electronics) , work function , organic solar cell , polymer , energy conversion efficiency , active layer , chemical engineering , optoelectronics , nanotechnology , chemistry , chromatography , composite material , ecology , thin film transistor , engineering , biology
Hole extraction in organic photovoltaic cells (OPVs) can be modulated by a surface‐enriched layer formed on top of the conducting polymer‐based hole extraction layer (HEL). This tunes the surface work function of the HEL to better align with the ionization potential of the polymeric photoactive layer. Results show noticeable improvement in device power conversion efficiencies (PCEs) in OPVs. We achieved a 6.1 % PCE from the OPV by optimizing the surface‐enriched layer.