Role of chloride on the instability of blue emitting mixed-halide perovskites
Abstract Although perovskite light-emitting diodes (PeLEDs) have seen unprecedented development in device efficiency over the past decade, they suffer significantly from poor operational stability. This is especially true for blue PeLEDs, whose operational lifetime remains orders of magnitude behind...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer & Higher Education Press
2023-11-01
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| Series: | Frontiers of Optoelectronics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s12200-023-00088-x |
| _version_ | 1797578140196798464 |
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| author | Max Karlsson Jiajun Qin Kaifeng Niu Xiyu Luo Johanna Rosen Jonas Björk Lian Duan Weidong Xu Feng Gao |
| author_facet | Max Karlsson Jiajun Qin Kaifeng Niu Xiyu Luo Johanna Rosen Jonas Björk Lian Duan Weidong Xu Feng Gao |
| author_sort | Max Karlsson |
| collection | DOAJ |
| description | Abstract Although perovskite light-emitting diodes (PeLEDs) have seen unprecedented development in device efficiency over the past decade, they suffer significantly from poor operational stability. This is especially true for blue PeLEDs, whose operational lifetime remains orders of magnitude behind their green and red counterparts. Here, we systematically investigate this efficiency-stability discrepancy in a series of green- to blue-emitting PeLEDs based on mixed Br/Cl-perovskites. We find that chloride incorporation, while having only a limited impact on efficiency, detrimentally affects device stability even in small amounts. Device lifetime drops exponentially with increasing Cl-content, accompanied by an increased rate of change in electrical properties during operation. We ascribe this phenomenon to an increased mobility of halogen ions in the mixed-halide lattice due to an increased chemically and structurally disordered landscape with reduced migration barriers. Our results indicate that the stability enhancement for PeLEDs might require different strategies from those used for improving efficiency. Graphical Abstract |
| first_indexed | 2024-03-10T22:18:01Z |
| format | Article |
| id | doaj.art-0888744edf484ef3a25198072917eb19 |
| institution | Directory Open Access Journal |
| issn | 2095-2767 |
| language | English |
| last_indexed | 2024-03-10T22:18:01Z |
| publishDate | 2023-11-01 |
| publisher | Springer & Higher Education Press |
| record_format | Article |
| series | Frontiers of Optoelectronics |
| spelling | doaj.art-0888744edf484ef3a25198072917eb192023-11-19T12:21:57ZengSpringer & Higher Education PressFrontiers of Optoelectronics2095-27672023-11-0116111010.1007/s12200-023-00088-xRole of chloride on the instability of blue emitting mixed-halide perovskitesMax Karlsson0Jiajun Qin1Kaifeng Niu2Xiyu Luo3Johanna Rosen4Jonas Björk5Lian Duan6Weidong Xu7Feng Gao8Department of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityKey Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics, Chemistry and Biology (IFM), Linköping UniversityAbstract Although perovskite light-emitting diodes (PeLEDs) have seen unprecedented development in device efficiency over the past decade, they suffer significantly from poor operational stability. This is especially true for blue PeLEDs, whose operational lifetime remains orders of magnitude behind their green and red counterparts. Here, we systematically investigate this efficiency-stability discrepancy in a series of green- to blue-emitting PeLEDs based on mixed Br/Cl-perovskites. We find that chloride incorporation, while having only a limited impact on efficiency, detrimentally affects device stability even in small amounts. Device lifetime drops exponentially with increasing Cl-content, accompanied by an increased rate of change in electrical properties during operation. We ascribe this phenomenon to an increased mobility of halogen ions in the mixed-halide lattice due to an increased chemically and structurally disordered landscape with reduced migration barriers. Our results indicate that the stability enhancement for PeLEDs might require different strategies from those used for improving efficiency. Graphical Abstracthttps://doi.org/10.1007/s12200-023-00088-xIon migrationBlue electroluminescenceMixed halide perovskites |
| spellingShingle | Max Karlsson Jiajun Qin Kaifeng Niu Xiyu Luo Johanna Rosen Jonas Björk Lian Duan Weidong Xu Feng Gao Role of chloride on the instability of blue emitting mixed-halide perovskites Frontiers of Optoelectronics Ion migration Blue electroluminescence Mixed halide perovskites |
| title | Role of chloride on the instability of blue emitting mixed-halide perovskites |
| title_full | Role of chloride on the instability of blue emitting mixed-halide perovskites |
| title_fullStr | Role of chloride on the instability of blue emitting mixed-halide perovskites |
| title_full_unstemmed | Role of chloride on the instability of blue emitting mixed-halide perovskites |
| title_short | Role of chloride on the instability of blue emitting mixed-halide perovskites |
| title_sort | role of chloride on the instability of blue emitting mixed halide perovskites |
| topic | Ion migration Blue electroluminescence Mixed halide perovskites |
| url | https://doi.org/10.1007/s12200-023-00088-x |
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