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Enhanced Photostabi...
Enhanced Photostability of "Hollow" Mixed Halide Wide-Bandgap Perovskite Films
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- Kim, Daehan (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.;Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea.
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- Safdari, Majid (author)
- KTH,Tillämpad fysikalisk kemi,Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
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- Lee, Seung Won (author)
- Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
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- Liu, Cheng (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
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- Yang, Yi (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
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- Namgung, Seok Daniel (author)
- Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.
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- Sargent, Edward H. (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
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- Hersam, Mark C. (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.;Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA.;Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA.
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- Kim, Dong-Hwan (author)
- Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea.
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- Kanatzidis, Mercouri G. (author)
- Northwestern Univ, Dept Chem, Evanston, IL 60208 USA.
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Northwestern Univ, Dept Chem, Evanston, IL 60208 USA;Sungkyunkwan Univ, Sch Chem Engn, Suwon 16419, South Korea. Tillämpad fysikalisk kemi (creator_code:org_t)
- American Chemical Society (ACS), 2023
- 2023
- English.
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In: ACS Energy Letters. - : American Chemical Society (ACS). - 2380-8195. ; 8:12, s. 5221-5228
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We investigated the role of hollow perovskite architectures in enhancing the photostability of mixed halide wide-bandgap perovskites. We focused on mitigating photoluminescence (PL) peak shifts caused by phase segregation when exposed to light. By analyzing the optical and structural properties of mixed bromide/iodide hollow perovskite thin films, we observed that the incorporation of hollow structures reduced the ionic conductivity in the films, leading to improved photostability compared to non-hollow perovskite samples. The mixed halide hollow perovskite thin films exhibited increased the bandgap. High-power laser irradiation was used to induce phase segregation, and changes in the PL emission spectra were measured as a function of irradiation time. The mixed halide hollow perovskite thin films exhibited reduced PL peak shifts compared to the control samples. The inclusion of enI(2) (en = ethylene-diamine) resulted in a reduction in the overall ionic conductivity of the films and a lower trap density. Hollow perovskite films incorporated in solar cells indicated that while the initial efficiency of the solar cells decreased with increasing enI2 concentration, the open-circuit voltage value increased, potentially due to the slight enhancement of the band gap. The findings highlight the potential of hollow perovskite architectures in enhancing the photostability of mixed halide perovskites.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- ref (subject category)
- art (subject category)
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- By the author/editor
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Kim, Daehan
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Safdari, Majid
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Lee, Seung Won
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Liu, Cheng
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Yang, Yi
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Namgung, Seok Da ...
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Sargent, Edward ...
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Hersam, Mark C.
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Kim, Dong-Hwan
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Kanatzidis, Merc ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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ACS Energy Lette ...
- By the university
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Royal Institute of Technology