Recovery mechanisms in aged kesterite solar cells

Stephen Campbell; Martial Duchamp; Bethan Ford; Michael Jones; Linh Lan Nguyen; Matthew C. Naylor; Xinya Xu; Pietro Maiello; Guillaume Zoppi; Vincent Barrioz; Neil Beattie; Yongtao Qu

doi:10.1021/acsaem.1c03247

Recovery mechanisms in aged kesterite solar cells

Stephen Campbell, Martial Duchamp, Bethan Ford, Michael Jones, Linh Lan Nguyen, Matthew C. Naylor, Xinya Xu, Pietro Maiello, Guillaume Zoppi, Vincent Barrioz, Neil Beattie^*, Yongtao Qu^*

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

3 Downloads (Pure)

Abstract

For successful long-term deployment and operation of kesterites Cu2ZnSn(SxSe1−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 inter-diffusion 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.

Original language	English
Pages (from-to)	5404-5414
Number of pages	11
Journal	ACS Applied Energy Materials
Volume	5
Issue number	5
Early online date	8 Mar 2022
DOIs	https://doi.org/10.1021/acsaem.1c03247
Publication status	Published - 23 May 2022

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ACS-AEM-Aged-Kesterite-reviAccepted author manuscript, 7.51 MB
Final published versionFinal published version, 4.08 MBLicence: CC BY
Advance online versionFinal published version, 4.2 MBLicence: CC BY

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title = "Recovery mechanisms in aged kesterite solar cells",

abstract = "For successful long-term deployment and operation of kesterites Cu2ZnSn(SxSe1−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 inter-diffusion 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.",

keywords = "SCAPS, elemental diffusion, heat treatment, in situ transmission electron microscopy (TEM), kesterite, photovoltaics",

author = "Stephen Campbell and Martial Duchamp and Bethan Ford and Michael Jones and Nguyen, {Linh Lan} and Naylor, {Matthew C.} and Xinya Xu and Pietro Maiello and Guillaume Zoppi and Vincent Barrioz and Neil Beattie and Yongtao Qu",

note = "Funding information: This work was supported by the Engineering, and Physical Sciences Research Council (EP18 SRC) (EP/T005491/1 and EP/S023836/1). The authors also appreciate the support from North East Centre for Energy Materials (NECEM) (EP/R021503/1) and British Council Newton Fund Institutional Links Grant (CRP01286). This research was funded by Ministry of Education, Singapore Tier 2 MOE2019-T2-2-066. M.D. and L.L.M. acknowledge the Facilities for Analysis, Characterization, Testing and Simulations (FACTS) at the Nanyang Technological University for access to the FIB and TEM equipment.",

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month = may,

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doi = "10.1021/acsaem.1c03247",

language = "English",

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T1 - Recovery mechanisms in aged kesterite solar cells

AU - Campbell, Stephen

AU - Duchamp, Martial

AU - Ford, Bethan

AU - Jones, Michael

AU - Nguyen, Linh Lan

AU - Naylor, Matthew C.

AU - Xu, Xinya

AU - Maiello, Pietro

AU - Zoppi, Guillaume

AU - Barrioz, Vincent

AU - Beattie, Neil

AU - Qu, Yongtao

N1 - Funding information: This work was supported by the Engineering, and Physical Sciences Research Council (EP18 SRC) (EP/T005491/1 and EP/S023836/1). The authors also appreciate the support from North East Centre for Energy Materials (NECEM) (EP/R021503/1) and British Council Newton Fund Institutional Links Grant (CRP01286). This research was funded by Ministry of Education, Singapore Tier 2 MOE2019-T2-2-066. M.D. and L.L.M. acknowledge the Facilities for Analysis, Characterization, Testing and Simulations (FACTS) at the Nanyang Technological University for access to the FIB and TEM equipment.

PY - 2022/5/23

Y1 - 2022/5/23

N2 - For successful long-term deployment and operation of kesterites Cu2ZnSn(SxSe1−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 inter-diffusion 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.

AB - For successful long-term deployment and operation of kesterites Cu2ZnSn(SxSe1−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 inter-diffusion 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.

KW - SCAPS

KW - elemental diffusion

KW - heat treatment

KW - in situ transmission electron microscopy (TEM)

KW - kesterite

KW - photovoltaics

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U2 - 10.1021/acsaem.1c03247

DO - 10.1021/acsaem.1c03247

M3 - Article

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SP - 5404

EP - 5414

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

SN - 2574-0962

IS - 5

ER -

Recovery mechanisms in aged kesterite solar cells

Abstract

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