11% Efficient Wide-Bandgap Cu(In,Ga)S2 Solar Cells with ITO Back Contact

[en] Wide-gap Cu(In, Ga)S2 solar cells with In2O3: Sn (ITO) as transparent back contact (TBC) are evaluated for the application of top cells in tandem cells. Efficiency of 11 % was achieved using wide bandgap (1.58 e V) absorber grown with NaF co-evaporation at high temperature. High temperature growth facilitated high quality absorber with quasi-Fermi level splitting above 1.0V. Despite the necessity of high temperature for good quality absorber, it offers extraction barrier with transparent back contact which limits the current density of solar cells. However, NaF co-evaporation increased the fill factor and improved the JV curve of the solar cell.

Disciplines :

Physics

Author, co-author :

KAUR, Kulwinder ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

Oli, Arivazhagan Valluvar; University of Luxembourg, Laboratory for Photovoltaics, Department of Physics and Materials Science, Belvaux, Luxembourg

MELCHIORRE, Michele ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

SIEBENTRITT, Susanne ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

External co-authors :

Language :

English

Title :

11% Efficient Wide-Bandgap Cu(In,Ga)S2 Solar Cells with ITO Back Contact

Publication date :

09 June 2024

Event name :

2024 IEEE 52nd Photovoltaic Specialist Conference (PVSC)

Event place :

Seattle, Usa

Event date :

09-06-2024 => 14-06-2024

Audience :

International

Main work title :

2024 IEEE 52nd Photovoltaic Specialist Conference, PVSC 2024

Publisher :

Institute of Electrical and Electronics Engineers Inc., United States

ISBN/EAN :

978-1-66546-426-0

Peer reviewed :

Peer reviewed

Additional URL :

http://xplorestaging.ieee.org/ielx8/10748554/10748647/10749274.pdf?arnumber=10749274

Funding text :

This work was financially supported by the European Union program HORIZON (Call: HORIZON-CL5-2021-D3-02, Project ID: 101075626 (SITA)).

Data Set :

10.1109/PVSC57443.2024.10749274

Available on ORBilu :

since 15 January 2026

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Bibliography

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