Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation
Organic-inorganic perovskite quantum dots (PeQDs) have attracted attention due to their excellent optical properties, e.g., high photoluminescence quantum yields (PLQYs; >70%), a narrow full width at half maximum (FWHM; 25 nm or less), and color tunability adjusted by the halide components in an...
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MDPI AG
2022-01-01
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| Series: | Technologies |
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| Online Access: | https://www.mdpi.com/2227-7080/10/1/10 |
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| author | Ryota Sato Kazuki Umemoto Satoshi Asakura Akito Masuhara |
| author_facet | Ryota Sato Kazuki Umemoto Satoshi Asakura Akito Masuhara |
| author_sort | Ryota Sato |
| collection | DOAJ |
| description | Organic-inorganic perovskite quantum dots (PeQDs) have attracted attention due to their excellent optical properties, e.g., high photoluminescence quantum yields (PLQYs; >70%), a narrow full width at half maximum (FWHM; 25 nm or less), and color tunability adjusted by the halide components in an entire tunability (from 450 nm to 730 nm). On the other hand, PeQD stability against air, humidity, and thermal conditions has still not been enough, which disturbs their application. To overcome these issues, with just a focus on the air stability, Mn<sup>2+</sup> ion passivated perovskite quantum dots (Mn/MAPbBr<sub>3</sub> QDs) were prepared. Mn<sup>2+</sup> could be expected to contract the passivating layer against the air condition because the Mn<sup>2+</sup> ion was changed to the oxidized Mn on PeQDs under the air conditions. In this research, Mn/MAPbBr<sub>3</sub> QDs were successfully prepared by ligand-assisted reprecipitation (LARP) methods. Surprisingly, Mn/MAPbBr<sub>3</sub> QD films showed more than double PLQY stability over 4 months compared with pure MAPbBr<sub>3</sub> ones against the air, which suggested that oxidized Mn worked as a passivating layer. Improving the PeQD stability is significantly critical for their application. |
| first_indexed | 2024-03-09T20:56:34Z |
| format | Article |
| id | doaj.art-8e157b263db044dd8e115bec79481bb7 |
| institution | Directory Open Access Journal |
| issn | 2227-7080 |
| language | English |
| last_indexed | 2024-03-09T20:56:34Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Technologies |
| spelling | doaj.art-8e157b263db044dd8e115bec79481bb72023-11-23T22:18:49ZengMDPI AGTechnologies2227-70802022-01-011011010.3390/technologies10010010Enhanced Air Stability of Perovskite Quantum Dots by Manganese PassivationRyota Sato0Kazuki Umemoto1Satoshi Asakura2Akito Masuhara3Graduate School of Science and Engineering, Yamagata University, 4-3-16, Yonezawa 992-8510, Yamagata, JapanGraduate School of Science and Engineering, Yamagata University, 4-3-16, Yonezawa 992-8510, Yamagata, JapanIse Chemicals Corporation, 1-3-1, Kyobashi, Chuo-ku, Tokyo 104-0031, JapanGraduate School of Science and Engineering, Yamagata University, 4-3-16, Yonezawa 992-8510, Yamagata, JapanOrganic-inorganic perovskite quantum dots (PeQDs) have attracted attention due to their excellent optical properties, e.g., high photoluminescence quantum yields (PLQYs; >70%), a narrow full width at half maximum (FWHM; 25 nm or less), and color tunability adjusted by the halide components in an entire tunability (from 450 nm to 730 nm). On the other hand, PeQD stability against air, humidity, and thermal conditions has still not been enough, which disturbs their application. To overcome these issues, with just a focus on the air stability, Mn<sup>2+</sup> ion passivated perovskite quantum dots (Mn/MAPbBr<sub>3</sub> QDs) were prepared. Mn<sup>2+</sup> could be expected to contract the passivating layer against the air condition because the Mn<sup>2+</sup> ion was changed to the oxidized Mn on PeQDs under the air conditions. In this research, Mn/MAPbBr<sub>3</sub> QDs were successfully prepared by ligand-assisted reprecipitation (LARP) methods. Surprisingly, Mn/MAPbBr<sub>3</sub> QD films showed more than double PLQY stability over 4 months compared with pure MAPbBr<sub>3</sub> ones against the air, which suggested that oxidized Mn worked as a passivating layer. Improving the PeQD stability is significantly critical for their application.https://www.mdpi.com/2227-7080/10/1/10perovskite quantum dotmanganese passivationair stability |
| spellingShingle | Ryota Sato Kazuki Umemoto Satoshi Asakura Akito Masuhara Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation Technologies perovskite quantum dot manganese passivation air stability |
| title | Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation |
| title_full | Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation |
| title_fullStr | Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation |
| title_full_unstemmed | Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation |
| title_short | Enhanced Air Stability of Perovskite Quantum Dots by Manganese Passivation |
| title_sort | enhanced air stability of perovskite quantum dots by manganese passivation |
| topic | perovskite quantum dot manganese passivation air stability |
| url | https://www.mdpi.com/2227-7080/10/1/10 |
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