Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes
Abstract Deep-blue perovskite light-emitting diodes (PeLEDs) based on reduced-dimensional perovskites (RDPs) still face a few challenges including severe trap-assisted nonradiative recombination, sluggish exciton transfer, and undesirable bathochromic shift of the electroluminescence spectra, impedi...
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Nature Publishing Group
2025-02-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-025-01768-3 |
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| author | Mubing Yu Tingxiao Qin Gang Gao Kelei Zu Dongming Zhang Nan Chen Dengke Wang Yong Hua Hong Zhang Yong-Biao Zhao Jiaqi Zhu |
| author_facet | Mubing Yu Tingxiao Qin Gang Gao Kelei Zu Dongming Zhang Nan Chen Dengke Wang Yong Hua Hong Zhang Yong-Biao Zhao Jiaqi Zhu |
| author_sort | Mubing Yu |
| collection | DOAJ |
| description | Abstract Deep-blue perovskite light-emitting diodes (PeLEDs) based on reduced-dimensional perovskites (RDPs) still face a few challenges including severe trap-assisted nonradiative recombination, sluggish exciton transfer, and undesirable bathochromic shift of the electroluminescence spectra, impeding the realization of high-performance PeLEDs. Herein, an in situ chlorination (isCl) post-treatment strategy was employed to regulate phase reconstruction and renovate multiple defects of RDPs, leading to superior carrier cooling of 0.88 ps, extraordinary exciton binding energy of 122.53 meV, and higher photoluminescence quantum yield of 60.9% for RDP films with deep-blue emission at 450 nm. The phase regulation is accomplished via fluorine-derived hydrogen bonds that suppress the formation of small-n phases. Multiple defects, including halide vacancies (shallow-state defects) and lead-chloride antisite defects (deep-state defects), are renovated via C=O coordination and hydroxy-group-derived hydrogen bonds. Consequently, deep-blue PeLEDs with a record maximum external quantum efficiency of 6.17% and stable electroluminescence at 454 nm were demonstrated, representing the best-performing deep-blue PeLEDs. |
| format | Article |
| id | doaj-art-e825e94da26048798cf0795ef6ebd921 |
| institution | OA Journals |
| issn | 2047-7538 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj-art-e825e94da26048798cf0795ef6ebd9212025-08-20T02:01:40ZengNature Publishing GroupLight: Science & Applications2047-75382025-02-0114111010.1038/s41377-025-01768-3Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodesMubing Yu0Tingxiao Qin1Gang Gao2Kelei Zu3Dongming Zhang4Nan Chen5Dengke Wang6Yong Hua7Hong Zhang8Yong-Biao Zhao9Jiaqi Zhu10National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of TechnologyBeijing Academy of Quantum Information SciencesNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of TechnologyCenter for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan UniversityCenter for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan UniversityCenter for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan UniversityCenter for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan UniversityYunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan UniversityZhengzhou Research Institute, Harbin Institute of TechnologyCenter for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan UniversityNational Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of TechnologyAbstract Deep-blue perovskite light-emitting diodes (PeLEDs) based on reduced-dimensional perovskites (RDPs) still face a few challenges including severe trap-assisted nonradiative recombination, sluggish exciton transfer, and undesirable bathochromic shift of the electroluminescence spectra, impeding the realization of high-performance PeLEDs. Herein, an in situ chlorination (isCl) post-treatment strategy was employed to regulate phase reconstruction and renovate multiple defects of RDPs, leading to superior carrier cooling of 0.88 ps, extraordinary exciton binding energy of 122.53 meV, and higher photoluminescence quantum yield of 60.9% for RDP films with deep-blue emission at 450 nm. The phase regulation is accomplished via fluorine-derived hydrogen bonds that suppress the formation of small-n phases. Multiple defects, including halide vacancies (shallow-state defects) and lead-chloride antisite defects (deep-state defects), are renovated via C=O coordination and hydroxy-group-derived hydrogen bonds. Consequently, deep-blue PeLEDs with a record maximum external quantum efficiency of 6.17% and stable electroluminescence at 454 nm were demonstrated, representing the best-performing deep-blue PeLEDs.https://doi.org/10.1038/s41377-025-01768-3 |
| spellingShingle | Mubing Yu Tingxiao Qin Gang Gao Kelei Zu Dongming Zhang Nan Chen Dengke Wang Yong Hua Hong Zhang Yong-Biao Zhao Jiaqi Zhu Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes Light: Science & Applications |
| title | Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes |
| title_full | Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes |
| title_fullStr | Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes |
| title_full_unstemmed | Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes |
| title_short | Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes |
| title_sort | multiple defects renovation and phase reconstruction of reduced dimensional perovskites via in situ chlorination for efficient deep blue 454 nm light emitting diodes |
| url | https://doi.org/10.1038/s41377-025-01768-3 |
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