Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals.
Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize singl...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
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Springer Nature
2017
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| _version_ | 1797056138893590528 |
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| author | Wenger, B Nayak, P Wen, X Kesava, S Noel, N Snaith, H |
| author_facet | Wenger, B Nayak, P Wen, X Kesava, S Noel, N Snaith, H |
| author_sort | Wenger, B |
| collection | OXFORD |
| description | Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize single crystals of methylammonium lead bromide (CH3NH3PbBr3), characterise the optical absorption and photoluminescence and show that the optical properties of single crystals are almost identical to those of polycrystalline thin films. We observe significantly longer lifetimes and show that carrier diffusion plays a substantial role in the photoluminescence decay. Contrary to many reports, we determine that the trap density in CH3NH3PbBr3 perovskite single crystals is 1015 cm-3, only one order of magnitude lower than in the thin films. Our enhanced understanding of optical properties and recombination processes elucidates ambiguities in earlier reports, and highlights the discrepancies in the estimation of trap densities from electronic and optical methods.Metal halide perovskites for optoelectronic devices have been extensively studied in two forms: single-crystals or polycrystalline thin films. Using spectroscopic approaches, Wenger et al. show that polycrystalline thin films possess similar optoelectronic properties to single crystals. |
| first_indexed | 2024-03-06T19:19:10Z |
| format | Journal article |
| id | oxford-uuid:197459a9-c127-4f8f-9e6f-33f00f4cedd1 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T19:19:10Z |
| publishDate | 2017 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:197459a9-c127-4f8f-9e6f-33f00f4cedd12022-03-26T10:49:05ZConsolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:197459a9-c127-4f8f-9e6f-33f00f4cedd1EnglishSymplectic Elements at OxfordSpringer Nature2017Wenger, BNayak, PWen, XKesava, SNoel, NSnaith, HUltralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize single crystals of methylammonium lead bromide (CH3NH3PbBr3), characterise the optical absorption and photoluminescence and show that the optical properties of single crystals are almost identical to those of polycrystalline thin films. We observe significantly longer lifetimes and show that carrier diffusion plays a substantial role in the photoluminescence decay. Contrary to many reports, we determine that the trap density in CH3NH3PbBr3 perovskite single crystals is 1015 cm-3, only one order of magnitude lower than in the thin films. Our enhanced understanding of optical properties and recombination processes elucidates ambiguities in earlier reports, and highlights the discrepancies in the estimation of trap densities from electronic and optical methods.Metal halide perovskites for optoelectronic devices have been extensively studied in two forms: single-crystals or polycrystalline thin films. Using spectroscopic approaches, Wenger et al. show that polycrystalline thin films possess similar optoelectronic properties to single crystals. |
| spellingShingle | Wenger, B Nayak, P Wen, X Kesava, S Noel, N Snaith, H Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title | Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title_full | Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title_fullStr | Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title_full_unstemmed | Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title_short | Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals. |
| title_sort | consolidation of the optoelectronic properties of ch3nh3pbbr3 perovskite single crystals |
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