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Solar Degradation and Stability of Lead‐Free Light Absorber Cs₂AgBiBr₆ in Ambient Conditions

Jöckel, Dennis Michael ; Yoon, Songhak ; Frebel, Alexander ; Neguse, Samuel Meles ; Rossa, Jürgen Dieter ; Bett, Alexander Jürgen ; Schubert, Martin ; Widenmeyer, Marc ; Balke-Grünewald, Benjamin ; Weidenkaff, Anke (2024)
Solar Degradation and Stability of Lead‐Free Light Absorber Cs₂AgBiBr₆ in Ambient Conditions.
In: Advanced Photonics Research, 2024, 5 (5)
doi: 10.26083/tuprints-00027691
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Item Type: Article
Type of entry: Secondary publication
Title: Solar Degradation and Stability of Lead‐Free Light Absorber Cs₂AgBiBr₆ in Ambient Conditions
Language: English
Date: 16 September 2024
Place of Publication: Darmstadt
Year of primary publication: May 2024
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Photonics Research
Volume of the journal: 5
Issue Number: 5
Collation: 10 Seiten
DOI: 10.26083/tuprints-00027691
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

As numerous studies on highly efficient perovskite solar cells have been conducted on lead‐based light absorbers, such as MAPbI₃ and FAPbI₃, increasing concerns are rising regarding toxicity and stability issues. One of the most prominent and promising lead‐free alternatives is the double‐perovskite Cs₂AgBiBr₆, which is well‐suited for multi‐junction solar cells considering its relatively large indirect bandgap of around 1.95–2.05 eV. Despite distinctive reports on its performance under ambient conditions, the demonstrated stability has not yet been conclusively clarified. Within this study, the degradation behavior of Cs₂AgBiBr₆ single crystals is investigated under different ambient environments, such as AM1.5g solar irradiation, aquatic conditions, and humidity. The corresponding samples are analyzed by using Raman, UV–vis, energy‐dispersive X‐Ray, and micro‐photoluminescence spectroscopies together with X‐Ray diffraction. High intrinsic stability of Cs₂AgBiBr₆ in ambient conditions and severe degradation in aquatic conditions are observed. Furthermore, surface morphology alterations are found during the simulated solar irradiation indicating photo‐accelerated degradation behavior. In the results of this study, it is clearly implied that intense research efforts need to be put into sealing the Cs₂AgBiBr₆ layer in solar cells with the goal of protecting it from humidity and water intrusion simultaneously, therefore avoiding photo‐accelerated degradation.

Uncontrolled Keywords: Cs₂AgBiBr₆, lead‐free photovoltaics, perovskite solar cells, stability studies
Identification Number: Artikel-ID: 2300269
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-276916
Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 16 Sep 2024 11:38
Last Modified: 16 Sep 2024 11:38
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27691
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