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Title: Copper thiocyanate: An attractive hole transport/extraction layer for use in organic photovoltaic cells

We report the advantageous properties of the inorganic molecular semiconductor copper(I) thiocyanate (CuSCN) for use as a hole collection/transport layer (HTL) in organic photovoltaic (OPV) cells. CuSCN possesses desirable HTL energy levels [i.e., valence band at −5.35 eV, 0.35 eV deeper than poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS)], which produces a 17% increase in power conversion efficiency (PCE) relative to PEDOT:PSS-based devices. In addition, a two-fold increase in shunt resistance for the solar cells measured in dark conditions is achieved. Ultimately, CuSCN enables polymer:fullerene based OPV cells to achieve PCE > 8%. CuSCN continues to offer promise as a chemically stable and straightforward replacement for the commonly used PEDOT:PSS.
Authors:
;  [1] ; ; ; ; ;  [2]
  1. Department of Materials and Centre for Plastic Electronics, Imperial College London, South Kensington Campus, London SW7 2AZ (United Kingdom)
  2. Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, South Kensington Campus, London SW7 2AZ (United Kingdom)
Publication Date:
OSTI Identifier:
22483160
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COPPER; EFFICIENCY; ENERGY LEVELS; EV RANGE; FULLERENES; HOLES; LAYERS; PHOTOVOLTAIC EFFECT; POLYMERS; SEMICONDUCTOR MATERIALS; SOLAR CELLS; THIOCYANATES; VALENCE