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The Role of Grain B...
The Role of Grain Boundaries on Ionic Defect Migration in Metal Halide Perovskites
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- Phung, Nga (author)
- Helmholtz Association of German Research Centers
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- Al-Ashouri, Amran (author)
- Helmholtz Association of German Research Centers
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- Meloni, Simone (author)
- University of Ferrara
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- Mattoni, Alessandro (author)
- CNR Istituto Officina dei Materiali (IOM)
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- Albrecht, Steve (author)
- Helmholtz Association of German Research Centers
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- Unger, Eva (author)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Helmholtz Association of German Research Centers
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- Merdasa, Aboma (author)
- Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Abate, Antonio (author)
- University of Naples Federico II,Helmholtz Association of German Research Centers
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(creator_code:org_t)
- 2020-04-19
- 2020
- English.
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In: Advanced Energy Materials. - : Wiley. - 1614-6832 .- 1614-6840. ; 10:20
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Abstract
Subject headings
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- Halide perovskites are emerging as revolutionary materials for optoelectronics. Their ionic nature and the presence of mobile ionic defects within the crystal structure have a dramatic influence on the operation of thin-film devices such as solar cells, light-emitting diodes, and transistors. Thin films are often polycrystalline and it is still under debate how grain boundaries affect the migration of ions and corresponding ionic defects. Laser excitation during photoluminescence (PL) microscopy experiments leads to formation and subsequent migration of ionic defects, which affects the dynamics of charge carrier recombination. From the microscopic observation of lateral PL distribution, the change in the distribution of ionic defects over time can be inferred. Resolving the PL dynamics in time and space of single crystals and thin films with different grain sizes thus, provides crucial information about the influence of grain boundaries on the ionic defect movement. In conjunction with experimental observations, atomistic simulations show that defects are trapped at the grain boundaries, thus inhibiting their diffusion. Hence, with this study, a comprehensive picture highlighting a fundamental property of the material is provided while also setting a theoretical framework in which the interaction between grain boundaries and ionic defect migration can be understood.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Grain boundaries
- halide perovskites
- ion migration
- molecular dynamic simulations
- photoluminescence
Publication and Content Type
- art (subject category)
- ref (subject category)
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