Interdigitated back-contacted structure: A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells

Nasim Rezaei; Paul Procel; Marcel Simor; Zeger Vroon; Miro Zeman; Olindo Isabella

doi:10.1002/pip.3296

Interdigitated back-contacted structure: A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells

Nasim Rezaei^*, Paul Procel , Marcel Simor, Zeger Vroon, Miro Zeman, Olindo Isabella

^*Corresponding author for this work

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

10 Citations (Scopus)

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Abstract

An interdigitated back-contacted (IBC) configuration is proposed for submicron copper indium gallium (di)selenide (CIGS). In a modelling platform, the structure was opto-electrically optimized for maximum efficiency. The results are compared with a reference front/back-contacted (FBC) solar cell with similar absorber thickness and exhibiting 11.9% efficiency. The electrical passivation at the front side is accomplished by an Al₂O₃ layer, which is endowed with negative fixed charges. The results indicate that with an optimal geometry and engineered bandgap grading, the efficiency of the new IBC structure can reach 17%. Additionally, with a reasonably low defect density in the absorber layer, efficiencies as high as 19.7% and open-circuit voltage comparable with that of the record solar cell are possible with the IBC structure.

Original language	English
Pages (from-to)	899-908
Number of pages	10
Journal	Progress in Photovoltaics: research and applications
Volume	28
Issue number	9
DOIs	https://doi.org/10.1002/pip.3296
Publication status	Published - 2020

Keywords

bandgap grading
CIGS solar cells
electrical modelling
IBC
light management

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/pip.3296

pip.3296Final published version, 3.93 MBLicence: CC BY-NC

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title = "Interdigitated back-contacted structure: A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells",

abstract = "An interdigitated back-contacted (IBC) configuration is proposed for submicron copper indium gallium (di)selenide (CIGS). In a modelling platform, the structure was opto-electrically optimized for maximum efficiency. The results are compared with a reference front/back-contacted (FBC) solar cell with similar absorber thickness and exhibiting 11.9% efficiency. The electrical passivation at the front side is accomplished by an Al2O3 layer, which is endowed with negative fixed charges. The results indicate that with an optimal geometry and engineered bandgap grading, the efficiency of the new IBC structure can reach 17%. Additionally, with a reasonably low defect density in the absorber layer, efficiencies as high as 19.7% and open-circuit voltage comparable with that of the record solar cell are possible with the IBC structure.",

keywords = "bandgap grading, CIGS solar cells, electrical modelling, IBC, light management",

author = "Nasim Rezaei and Paul Procel and Marcel Simor and Zeger Vroon and Miro Zeman and Olindo Isabella",

year = "2020",

doi = "10.1002/pip.3296",

language = "English",

volume = "28",

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journal = "Progress in Photovoltaics: research and applications",

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Interdigitated back-contacted structure: A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells. / Rezaei, Nasim; Procel , Paul; Simor, Marcel et al.
In: Progress in Photovoltaics: research and applications, Vol. 28, No. 9, 2020, p. 899-908.

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

TY - JOUR

T1 - Interdigitated back-contacted structure

T2 - A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells

AU - Rezaei, Nasim

AU - Procel , Paul

AU - Simor, Marcel

AU - Vroon, Zeger

AU - Zeman, Miro

AU - Isabella, Olindo

PY - 2020

Y1 - 2020

N2 - An interdigitated back-contacted (IBC) configuration is proposed for submicron copper indium gallium (di)selenide (CIGS). In a modelling platform, the structure was opto-electrically optimized for maximum efficiency. The results are compared with a reference front/back-contacted (FBC) solar cell with similar absorber thickness and exhibiting 11.9% efficiency. The electrical passivation at the front side is accomplished by an Al2O3 layer, which is endowed with negative fixed charges. The results indicate that with an optimal geometry and engineered bandgap grading, the efficiency of the new IBC structure can reach 17%. Additionally, with a reasonably low defect density in the absorber layer, efficiencies as high as 19.7% and open-circuit voltage comparable with that of the record solar cell are possible with the IBC structure.

AB - An interdigitated back-contacted (IBC) configuration is proposed for submicron copper indium gallium (di)selenide (CIGS). In a modelling platform, the structure was opto-electrically optimized for maximum efficiency. The results are compared with a reference front/back-contacted (FBC) solar cell with similar absorber thickness and exhibiting 11.9% efficiency. The electrical passivation at the front side is accomplished by an Al2O3 layer, which is endowed with negative fixed charges. The results indicate that with an optimal geometry and engineered bandgap grading, the efficiency of the new IBC structure can reach 17%. Additionally, with a reasonably low defect density in the absorber layer, efficiencies as high as 19.7% and open-circuit voltage comparable with that of the record solar cell are possible with the IBC structure.

KW - bandgap grading

KW - CIGS solar cells

KW - electrical modelling

KW - IBC

KW - light management

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U2 - 10.1002/pip.3296

DO - 10.1002/pip.3296

M3 - Article

AN - SCOPUS:85086260476

SN - 1062-7995

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SP - 899

EP - 908

JO - Progress in Photovoltaics: research and applications

JF - Progress in Photovoltaics: research and applications

IS - 9

ER -

Interdigitated back-contacted structure: A different approach towards high-efficiency ultrathin copper indium gallium (di)selenide solar cells

Abstract

Keywords

UN SDGs

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