Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand
Abstract A detailed picture of temperature dependent behavior of CsxFA1-xPbI3 perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site c...
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Nature Portfolio
2023-04-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-37943-6 |
| _version_ | 1827961193859383296 |
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| author | Shuo Wang Qian Zhao Abhijit Hazarika Simiao Li Yue Wu Yaxin Zhai Xihan Chen Joseph M. Luther Guoran Li |
| author_facet | Shuo Wang Qian Zhao Abhijit Hazarika Simiao Li Yue Wu Yaxin Zhai Xihan Chen Joseph M. Luther Guoran Li |
| author_sort | Shuo Wang |
| collection | DOAJ |
| description | Abstract A detailed picture of temperature dependent behavior of CsxFA1-xPbI3 perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site chemical composition and surface ligand binding. The thermal degradation mechanism depends not only on the exact chemical composition, but also on the ligand binding energy. The thermal degradation of Cs-rich perovskite quantum dots is induced by a phase transition from black γ-phase to yellow δ-phase, while FA-rich perovskite quantum dots with higher ligand binding energy directly decompose into PbI2. Quantum dot growth to form large bulk size grain is observed for all CsxFA1-xPbI3 perovskite quantum dots at elevated temperatures. In addition, FA-rich quantum dots possess stronger electron−longitudinal optical phonon coupling, suggesting that photogenerated excitons in FA-rich quantum dots have higher probability to be dissociated by phonon scattering compared to Cs-rich quantum dots. |
| first_indexed | 2024-04-09T16:23:03Z |
| format | Article |
| id | doaj.art-9b05e667ec5f402ba1d83b8f13e66e20 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-09T16:23:03Z |
| publishDate | 2023-04-01 |
| publisher | Nature Portfolio |
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| series | Nature Communications |
| spelling | doaj.art-9b05e667ec5f402ba1d83b8f13e66e202023-04-23T11:22:41ZengNature PortfolioNature Communications2041-17232023-04-0114111210.1038/s41467-023-37943-6Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligandShuo Wang0Qian Zhao1Abhijit Hazarika2Simiao Li3Yue Wu4Yaxin Zhai5Xihan Chen6Joseph M. Luther7Guoran Li8Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai UniversityInstitute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai UniversityPolymers and Functional Materials Division, CSIR-Indian Institute of Chemical TechnologyInstitute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai UniversityInstitute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai UniversityNational Renewable Energy LaboratorySUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Southern University of Science and TechnologyNational Renewable Energy LaboratoryInstitute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai UniversityAbstract A detailed picture of temperature dependent behavior of CsxFA1-xPbI3 perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site chemical composition and surface ligand binding. The thermal degradation mechanism depends not only on the exact chemical composition, but also on the ligand binding energy. The thermal degradation of Cs-rich perovskite quantum dots is induced by a phase transition from black γ-phase to yellow δ-phase, while FA-rich perovskite quantum dots with higher ligand binding energy directly decompose into PbI2. Quantum dot growth to form large bulk size grain is observed for all CsxFA1-xPbI3 perovskite quantum dots at elevated temperatures. In addition, FA-rich quantum dots possess stronger electron−longitudinal optical phonon coupling, suggesting that photogenerated excitons in FA-rich quantum dots have higher probability to be dissociated by phonon scattering compared to Cs-rich quantum dots.https://doi.org/10.1038/s41467-023-37943-6 |
| spellingShingle | Shuo Wang Qian Zhao Abhijit Hazarika Simiao Li Yue Wu Yaxin Zhai Xihan Chen Joseph M. Luther Guoran Li Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand Nature Communications |
| title | Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand |
| title_full | Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand |
| title_fullStr | Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand |
| title_full_unstemmed | Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand |
| title_short | Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand |
| title_sort | thermal tolerance of perovskite quantum dots dependent on a site cation and surface ligand |
| url | https://doi.org/10.1038/s41467-023-37943-6 |
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