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How Photogenerated ...
How Photogenerated I2 Induces I-Rich Phase Formation in Lead Mixed Halide Perovskites
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- Zhou, Yang (author)
- Ist Italiano Tecnol, Italy
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- van Laar, Simone C. W. (author)
- Eindhoven Univ Technol, Netherlands
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- Meggiolaro, Daniele (author)
- Ist CNR Sci & Tecnol Chim Giulio Natta CNR SCITEC, Italy
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- Gregori, Luca (author)
- Ist CNR Sci & Tecnol Chim Giulio Natta CNR SCITEC, Italy; Univ Perugia, Italy; INSTM, Italy
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- Martani, Samuele (author)
- Ist Italiano Tecnol, Italy
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- Heng, Jia-Yong (author)
- Chinese Univ Hong Kong, Peoples R China
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- Datta, Kunal (author)
- Molecular Materials and Nanosystems, Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
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- Jimenez-Lopez, Jesus (author)
- Ist Italiano Tecnol, Italy
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- Wang, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Wong, E. Laine (author)
- Ist Italiano Tecnol, Italy
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- Poli, Isabella (author)
- Ist Italiano Tecnol, Italy
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- Treglia, Antonella (author)
- Ist Italiano Tecnol, Italy
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- Cortecchia, Daniele (author)
- Ist Italiano Tecnol, Italy
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- Prato, Mirko (author)
- Ist Italiano Tecnol, Italy
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- Kobera, Libor (author)
- Czech Acad Sci, Czech Republic
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zhao, Ni (author)
- Chinese Univ Hong Kong, Peoples R China
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- Janssen, Rene A. J. (author)
- Eindhoven Univ Technol, Netherlands
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- De Angelis, Filippo (author)
- Ist CNR Sci & Tecnol Chim Giulio Natta CNR SCITEC, Italy; Univ Perugia, Italy; INSTM, Italy; Sungkyunkwan Univ, South Korea
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- Petrozza, Annamaria (author)
- Ist Italiano Tecnol, Italy
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Advanced Materials. - : WILEY-V C H VERLAG GMBH. - 0935-9648 .- 1521-4095.
- 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
Subject headings
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- Bandgap tunability of lead mixed halide perovskites (LMHPs) is a crucial characteristic for versatile optoelectronic applications. Nevertheless, LMHPs show the formation of iodide-rich (I-rich) phase under illumination, which destabilizes the semiconductor bandgap and impedes their exploitation. Here, it is shown that how I-2, photogenerated upon charge carrier trapping at iodine interstitials in LMHPs, can promote the formation of I-rich phase. I-2 can react with bromide (Br-) in the perovskite to form a trihalide ion I2Br- (I delta--I delta+-Br delta-), whose negatively charged iodide (I delta-) can further exchange with another lattice Br- to form the I-rich phase. Importantly, it is observed that the effectiveness of the process is dependent on the overall stability of the crystalline perovskite structure. Therefore, the bandgap instability in LMHPs is governed by two factors, i.e., the density of native defects leading to I-2 production and the Br- binding strength within the crystalline unit. Eventually, this study provides rules for the design of chemical composition in LMHPs to reach their full potential for optoelectronic devices.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- defects; metal halide semiconductors; optoelectronics; solar cells; wide bandgap metal halide perovskites
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zhou, Yang
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van Laar, Simone ...
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Meggiolaro, Dani ...
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Gregori, Luca
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Martani, Samuele
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Heng, Jia-Yong
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show more...
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Datta, Kunal
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Jimenez-Lopez, J ...
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Wang, Feng
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Wong, E. Laine
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Poli, Isabella
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Treglia, Antonel ...
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Cortecchia, Dani ...
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Prato, Mirko
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Kobera, Libor
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Gao, Feng
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Zhao, Ni
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Janssen, Rene A. ...
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De Angelis, Fili ...
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Petrozza, Annama ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- By the university
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Linköping University