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Title: Recovery mechanisms in aged kesterite solar cells
Authors: Campbell, Stephen
Duchamp, Martial
Ford, Bethan
Jones, Michael
Nguyen, Linh Lan
Naylor, Matthew C.
Xu, Xinya
Maiello, Pietro
Zoppi, Guillaume
Barrioz, Vincent
Beattie, Neil S.
Qu, Yongtao
Keywords: Engineering::Materials
Issue Date: 2022
Source: Campbell, S., Duchamp, M., Ford, B., Jones, M., Nguyen, L. L., Naylor, M. C., Xu, X., Maiello, P., Zoppi, G., Barrioz, V., Beattie, N. S. & Qu, Y. (2022). Recovery mechanisms in aged kesterite solar cells. ACS Applied Energy Materials, 5(5), 5404-5414.
Project: MOE2019-T2-2- 066 
Journal: ACS Applied Energy Materials 
Abstract: For successful long-term deployment and operation of kesterites Cu2ZnSn(S x Se1-x )4 (CZTSSe) as light-absorber materials for photovoltaics, device stability and recovery in kesterite solar cells are investigated. A low-temperature heat treatment is applied to overcome the poor charge extraction that developed in the natural aging process. It is suggested that defect states at aged CZTSSe/CdS heterojunctions were reduced, while apparent doping density in the CZTSSe absorber increased due to Cd/Zn interdiffusion at the heterojunction during the annealing process. In situ annealing experiments in a transmission electron microscope were used to investigate the elemental diffusion at the CZTSSe/CdS heterojunction. This study reveals the critical role of heat treatment to enhance the absorber/Mo back contact, improve the quality of the absorber/buffer heterojunction, and recover the device performance in aged kesterite thin-film solar cells.
ISSN: 2574-0962
DOI: 10.1021/acsaem.1c03247
Schools: School of Materials Science and Engineering 
Research Centres: Laboratory for In Situ and Operando Electron Nanoscopy
Rights: © 2022 The Authors. Published by American Chemical Society. This is an open-access article distributed under the terms of the Creative Commons Attribution License.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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