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High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency

Engineering and Technology

High-concentration silver alloying and steep back-contact gallium grading enabling copper indium gallium selenide solar cell with 23.6% efficiency

J. Keller, K. Kiselman, et al.

Discover how researchers Jan Keller, Klara Kiselman, Olivier Donzel-Gargand, Natalia M. Martin, Melike Babucci, Olle Lundberg, Erik Wallin, Lars Stolt, and Marika Edoff achieved a groundbreaking efficiency of 23.64% for (Ag,Cu)(In,Ga)Se₂ solar cells through innovative strategies. Their work is paving the way towards achieving a remarkable 25% efficiency in the future!

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Playback language: English
Abstract
This paper reports a certified efficiency of 23.64% for a (Ag,Cu)(In,Ga)Se₂ solar cell, achieved through a series of strategies. These include a relatively high silver concentration in the absorber, a 'hockey stick'-like gallium profile minimizing bandgap fluctuations, a RbF post-deposition treatment passivating the absorber surface, and light soaking to maximize efficiency. The paper discusses future directions to reach 25% efficiency.
Publisher
Nature Energy
Published On
Apr 01, 2024
Authors
Jan Keller, Klara Kiselman, Olivier Donzel-Gargand, Natalia M. Martin, Melike Babucci, Olle Lundberg, Erik Wallin, Lars Stolt, Marika Edoff
Tags
solar cell
efficiency
AgCuInGaSe2
bandgap fluctuations
light soaking
post-deposition treatment
surface passivation

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