Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75869
Title: Copper(I) thiocyanate (CuSCN) hole-transport layers processed from aqueous precursor solutions and their application in thin-film transistors and highly efficient organic and organometal halide perovskite solar cells
Authors: Wijeyasinghe, N
Regoutz, A
Eisner, F
Du, T
Tsetseris, L
Lin, YH
Faber, H
Pattanasattayavong, P
Li, JH 
Yan, F 
McLachlan, MA
Payne, DJ
Heeney, M
Anthopoulos, TD
Keywords: Copper(I) thiocyanate
Hole-transport layers
Organic solar cells
Perovskite solar cells
Transparent semiconductors and transistors
Issue Date: 2017
Publisher: Wiley-VCH
Source: Advanced functional materials, 2017, v. 27, no. 35, 1701818 How to cite?
Journal: Advanced functional materials 
Abstract: This study reports the development of copper(I) thiocyanate (CuSCN) hole-transport layers (HTLs) processed from aqueous ammonia as a novel alternative to conventional n-alkyl sulfide solvents. Wide bandgap (3.4-3.9 eV) and ultrathin (3-5 nm) layers of CuSCN are formed when the aqueous CuSCN-ammine complex solution is spin-cast in air and annealed at 100 degrees C. X-ray photoelectron spectroscopy confirms the high compositional purity of the formed CuSCN layers, while the high-resolution valence band spectra agree with first-principles calculations. Study of the hole-transport properties using field-effect transistor measurements reveals that the aqueous-processed CuSCN layers exhibit a fivefold higher hole mobility than films processed from diethyl sulfide solutions with the maximum values approaching 0.1 cm(2) V-1 s(-1). A further interesting characteristic is the low surface roughness of the resulting CuSCN layers, which in the case of solar cells helps to planarize the indium tin oxide anode. Organic bulk heterojunction and planar organometal halide perovskite solar cells based on aqueous-processed CuSCN HTLs yield power conversion efficiency of 10.7% and 17.5%, respectively. Importantly, aqueous-processed CuSCN-based cells consistently outperform devices based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate HTLs. This is the first report on CuSCN films and devices processed via an aqueous-based synthetic route that is compatible with high-throughput manufacturing and paves the way for further developments.
URI: http://hdl.handle.net/10397/75869
ISSN: 1616-301X
EISSN: 1616-3028
DOI: 10.1002/adfm.201701818
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

3
Citations as of May 12, 2018

WEB OF SCIENCETM
Citations

4
Last Week
0
Last month
Citations as of May 20, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.