Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals
Intrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Chemical Society
2018
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| _version_ | 1826305849550700544 |
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| author | Nayak, PK Sendner, M Wenger, B Wang, Z Sharma, K Ramadan, AJ Lovrinčić, R Pucci, A Madhu, PK Snaith, HJ |
| author_facet | Nayak, PK Sendner, M Wenger, B Wang, Z Sharma, K Ramadan, AJ Lovrinčić, R Pucci, A Madhu, PK Snaith, HJ |
| author_sort | Nayak, PK |
| collection | OXFORD |
| description | Intrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the charge carrier density in the semiconductor. It has been reported that inclusion of Bi3+ decreases the band gap of the material considerably. However, contrary to the earlier conclusions, despite a clear change in the appearance of the crystal as observed by eye, here we show that the band gap of MAPbBr3 crystals does not change due the presence of Bi3+ in the growth solution. An increased density of states in the band gap and use of very thick samples for transmission measurements, erroneously give the impression of a band gap shift. These sub band gap states also act as nonradiative recombination centers in the crystals. |
| first_indexed | 2024-03-07T06:39:06Z |
| format | Journal article |
| id | oxford-uuid:f8ab077c-41af-4eee-be49-daf7f971282d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:39:06Z |
| publishDate | 2018 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:f8ab077c-41af-4eee-be49-daf7f971282d2022-03-27T12:52:02ZImpact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystalsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f8ab077c-41af-4eee-be49-daf7f971282dEnglishSymplectic Elements at OxfordAmerican Chemical Society2018Nayak, PKSendner, MWenger, BWang, ZSharma, KRamadan, AJLovrinčić, RPucci, AMadhu, PKSnaith, HJIntrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the charge carrier density in the semiconductor. It has been reported that inclusion of Bi3+ decreases the band gap of the material considerably. However, contrary to the earlier conclusions, despite a clear change in the appearance of the crystal as observed by eye, here we show that the band gap of MAPbBr3 crystals does not change due the presence of Bi3+ in the growth solution. An increased density of states in the band gap and use of very thick samples for transmission measurements, erroneously give the impression of a band gap shift. These sub band gap states also act as nonradiative recombination centers in the crystals. |
| spellingShingle | Nayak, PK Sendner, M Wenger, B Wang, Z Sharma, K Ramadan, AJ Lovrinčić, R Pucci, A Madhu, PK Snaith, HJ Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title | Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title_full | Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title_fullStr | Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title_full_unstemmed | Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title_short | Impact of Bi3+ heterovalent doping in organic-inorganic metal halide perovskite crystals |
| title_sort | impact of bi3 heterovalent doping in organic inorganic metal halide perovskite crystals |
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