Copper (I) selenocyanate (CuSeCN) as a novel hole-transport layer for transistors, organic solar cells, and light-emitting diodes

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Title: Copper (I) selenocyanate (CuSeCN) as a novel hole-transport layer for transistors, organic solar cells, and light-emitting diodes
Author(s): Wijeyasinghe, N
Tsetseris, L
Regoutz, A
Sit, WY
Fei, Z
Du, T
Wang, X
Mclachlan, MA
Vourlias, G
Patsalas, PA
Payne, DJ
Heeney, M
Anthopoulos, TD
Item Type: Journal Article
Abstract: The synthesis and characterization of copper (I) selenocyanate (CuSeCN) and its application as a solution-processable hole-transport layer (HTL) material in transistors, organic light-emitting diodes, and solar cells are reported. Density-functional theory calculations combined with X-ray photoelectron spectroscopy are used to elucidate the electronic band structure, density of states, and microstructure of CuSeCN. Solution-processed layers are found to be nanocrystalline and optically transparent ( > 94%), due to the large bandgap of ≥3.1 eV, with a valence band maximum located at -5.1 eV. Hole-transport analysis performed using field-effect measurements confirms the p-type character of CuSeCN yielding a hole mobility of 0.002 cm 2 V -1 s -1 . When CuSeCN is incorporated as the HTL material in organic light-emitting diodes and organic solar cells, the resulting devices exhibit comparable or improved performance to control devices based on commercially available poly(3,4-ethylenedioxythiophene):polystyrene sulfonate as the HTL. This is the first report on the semiconducting character of CuSeCN and it highlights the tremendous potential for further developments in the area of metal pseudohalides.
Publication Date: 1-Apr-2018
Date of Acceptance: 5-Jan-2018
URI: http://hdl.handle.net/10044/1/57020
DOI: https://dx.doi.org/10.1002/adfm.201707319
ISSN: 1616-301X
Publisher: Wiley
Journal / Book Title: Advanced Functional Materials
Volume: 28
Issue: 14
Copyright Statement: © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: N. Wijeyasinghe, L. Tsetseris, A. Regoutz, W.-Y. Sit, Z. Fei, T. Du, X. Wang, M. A. McLachlan, G. Vourlias, P. A. Patsalas, D. J. Payne, M. Heeney, T. D. Anthopoulos, Adv. Funct. Mater. 2018, 1707319, which has been published in final form at https://dx.doi.org/10.1002/adfm.201707319. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/J021199/1
280221
EP/K503381/1
EP/M013839/1
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
copper (I) selenocyanate
hole-transport layers
organic light-emitting diodes
organic solar cells
transparent semiconductors
THIN-FILM TRANSISTORS
AUGMENTED-WAVE METHOD
OPTICAL-PROPERTIES
INJECTION LAYER
HIGH-EFFICIENCY
ELECTRICAL-PROPERTIES
ELECTRONIC-STRUCTURE
PHOTOVOLTAIC CELLS
CLUSTER COMPLEXES
EXACT EXCHANGE
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Materials
Publication Status: Published
Article Number: 1707319
Embargo Date: 2019-02-01
Online Publication Date: 2018-02-01
Appears in Collections:Faculty of Engineering
Materials
Physics
Chemistry
Experimental Solid State
Faculty of Natural Sciences



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