Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects
With the development in fabricating efficient perovskite light emitting diodes (PeLEDs), improving the operating stability becomes an urgent task. Here we report quantum dot (QD) enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of...
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| Format: | Article |
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KeAi Communications Co. Ltd.
2025-01-01
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| Series: | Fundamental Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667325822003442 |
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| author | Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji |
| author_facet | Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji |
| author_sort | Xulan Xue |
| collection | DOAJ |
| description | With the development in fabricating efficient perovskite light emitting diodes (PeLEDs), improving the operating stability becomes an urgent task. Here we report quantum dot (QD) enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of FAPbBr3 perovskite nanocrystals (PNCs) films. In comparison with PNC films with pristine toluene as the anti-solvent, the as-prepared FAPbBr3 PNC films with a QD monolayer on the surface exhibit improved photoluminescence quantum yield, enhanced photostability and better reproducibility. Benefiting from these advantages, the peak luminance and the maximum external quantum efficiency of the PeLED containing QD monolayer are increased from 6807 cd/m2 to 86,670 cd/m2 and 2.4% to 7.1%, respectively. The T50 lifetime under the initial luminance of 1021 cd/m2 approaches 83 minutes. Based on electrical field simulation and transient electroluminescence measurements, the enhanced stability can be mainly attributed to the electrical field redistribution induced by the QD monolayer. This work demonstrates that the combination of QDs and perovskites provides an effective strategy to address the operational stability of PeLEDs. The insights into electrical field distribution effect will make great impact on stability improvement of other perovskite based devices. |
| format | Article |
| id | doaj-art-18812009f7294fe5a55b22ec50795f87 |
| institution | Kabale University |
| issn | 2667-3258 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Fundamental Research |
| spelling | doaj-art-18812009f7294fe5a55b22ec50795f872025-01-29T05:02:26ZengKeAi Communications Co. Ltd.Fundamental Research2667-32582025-01-0151347353Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effectsXulan Xue0Menglin Li1Zhenjie Liu2Chenhui Wang3Jincheng Xu4Shuangpeng Wang5Hanzhuang Zhang6Haizheng Zhong7Wenyu Ji8Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, ChinaMIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, ChinaKey Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, ChinaMIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, ChinaInstitute of Applied Physics and Materials Engineering, University of Macau, Taipa 999078, ChinaInstitute of Applied Physics and Materials Engineering, University of Macau, Taipa 999078, ChinaKey Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, ChinaMIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China; Corresponding authors.Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China; Corresponding authors.With the development in fabricating efficient perovskite light emitting diodes (PeLEDs), improving the operating stability becomes an urgent task. Here we report quantum dot (QD) enhanced stability of PeLEDs by introducing CdSe/ZnS core-shell QDs in toluene anti-solvent during in-situ fabrication of FAPbBr3 perovskite nanocrystals (PNCs) films. In comparison with PNC films with pristine toluene as the anti-solvent, the as-prepared FAPbBr3 PNC films with a QD monolayer on the surface exhibit improved photoluminescence quantum yield, enhanced photostability and better reproducibility. Benefiting from these advantages, the peak luminance and the maximum external quantum efficiency of the PeLED containing QD monolayer are increased from 6807 cd/m2 to 86,670 cd/m2 and 2.4% to 7.1%, respectively. The T50 lifetime under the initial luminance of 1021 cd/m2 approaches 83 minutes. Based on electrical field simulation and transient electroluminescence measurements, the enhanced stability can be mainly attributed to the electrical field redistribution induced by the QD monolayer. This work demonstrates that the combination of QDs and perovskites provides an effective strategy to address the operational stability of PeLEDs. The insights into electrical field distribution effect will make great impact on stability improvement of other perovskite based devices.http://www.sciencedirect.com/science/article/pii/S2667325822003442Perovskite nanocrystalsQuantum dotsElectrical field distributionLight-emitting diodesOperational stability |
| spellingShingle | Xulan Xue Menglin Li Zhenjie Liu Chenhui Wang Jincheng Xu Shuangpeng Wang Hanzhuang Zhang Haizheng Zhong Wenyu Ji Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects Fundamental Research Perovskite nanocrystals Quantum dots Electrical field distribution Light-emitting diodes Operational stability |
| title | Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects |
| title_full | Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects |
| title_fullStr | Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects |
| title_full_unstemmed | Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects |
| title_short | Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects |
| title_sort | quantum dots enhanced stability of in situ fabricated perovskite nanocrystals based light emitting diodes electrical field distribution effects |
| topic | Perovskite nanocrystals Quantum dots Electrical field distribution Light-emitting diodes Operational stability |
| url | http://www.sciencedirect.com/science/article/pii/S2667325822003442 |
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