2022 MOCVD of II-VI HRT_Emitters for Voc Improvements to CdTe coatings-12-00261.pdf (6.64 MB)
Download fileMOCVD of II-VI HRT/emitters for Voc improvements to CdTe solar cells
journal contribution
posted on 2022-02-18, 14:09 authored by Andrew J Clayton, Ali AbbasAli Abbas, Peter J Siderfin, Stephen Jones, Ana Teloeken, Ochai Oklobia, Michael WallsMichael Walls, Stuart JC IrvineCdTe solar cells were produced using metal organic chemical vapour deposition (MOCVD), which employed a (Zn,Al)S (AZS) high resistant transparent (HRT) layer at the transparent conducting oxide (TCO)/Cd(Zn)S emitter interface, to enable the higher annealing temperature of 440 °C to be employed in the chlorine heat treatment (CHT) process. The AZS HRT remained intact with conformal coverage over the TCO after performing the high CHT annealing, confirmed by cross-section scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy (STEM-EDX) characterisation, which also revealed the Cd(Zn)S emitter layer having been consumed by the CdTe absorber via interdiffusion. The more aggressive CHT resulted in large CdTe grains. The combination of AZS HRT and aggressive CHT increased open circuit voltage (Voc) and improved solar cell performance.
Funding
Europe Regional Development Fund (ERDF) through the Welsh European Funding Office (WEFO) on the 2nd Solar Photovoltaic Academic Research Consortium (SPARC II) project, case number 81133
Doped Emitters to Unlock Lowest Cost Solar Electricity
Engineering and Physical Sciences Research Council
Find out more...History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
CoatingsVolume
12Issue
2Publisher
MDPI AGVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/Acceptance date
2022-02-08Publication date
2022-02-16Copyright date
2022eISSN
2079-6412Publisher version
Language
- en