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Se profiles in CST films formed by annealing CdTe/CdSe bi-layers
conference contribution
posted on 2020-01-24, 13:11 authored by Shamara Collins, Chih An Hsu, Vasilios Palekis, Ali AbbasAli Abbas, Michael WallsMichael Walls, Chris FerekidesSe profiles in CST (CdSe X Te 1-x ) films formed by annealing CdTe/CdSe bilayers has been studied using transmission electron microscopy (TEM) and photoluminescence (PL). The effect of CdSe layer thickness and CdCl 2 annealing conditions on the alloy layer were investigated. The CdSe thickness was varied from 75 to 1,500 Å. All “thick” films (CdSe Å300 Å) exhibited smaller grain structure at the interface compared to the “thin” films (CdSe 75-30 Å), which exhibited large columnar grains that extended through the CST/CdTe film thickness. The alloy layer for “thick” CdSe films appeared as a bilayer with two CST compositions: Se-rich and Te-rich. Photoluminescence measurements revealed Se related defects in the films with thicker CdSe (1,000 and 1,500 Å). The Se compositional profile was found to be greatly dependent on the CdSe thickness and CdCl 2 heat treatment conditions. The formation of voids at the interface for large CdSe thicknesses suggests that this approach may be only suitable for the formation of relatively low Se content CST films.
Funding
OTH Supersolar hub - Extension : EP/P02484X/1
IAA 17 - Michael Walls - EPG June 17
History
School
- Mechanical, Electrical and Manufacturing Engineering
Research Unit
- Centre for Renewable Energy Systems Technology (CREST)
Published in
2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC)Pages
114 - 118Publisher
IEEEVersion
- AM (Accepted Manuscript)
Rights holder
© IEEEPublisher statement
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Publication date
2018-11-29Copyright date
2018ISBN
9781538685297Publisher version
Language
- en
Location
Waikoloa Village, HI, USAEvent dates
10th June 2018 - 15th June 2018Depositor
Dr Ali Abbas. Deposit date: 21 January 2020Usage metrics
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