Suppressing Auger Recombination in Cesium Lead Bromide Perovskite Nanocrystal Film for Bright Light-Emitting Diodes
文献类型：期刊论文
| 作者 | J. S. Yao,J. C. Zhang,L. Wang,K. H. Wang,X. C. Ru,J. N. Yang,J. J. Wang,X. Chen,Y. H. Song,Y. C. Yin,Y. F. Lan,Q. Zhang and H. B. Yao |
| 刊名 | Journal of Physical Chemistry Letters
 |
| 出版日期 | 2020 |
| 卷号 | 11期号:21页码:9371-9378 |
| ISSN号 | 1948-7185 |
| DOI | 10.1021/acs.jpclett.0c02777 |
| 英文摘要 | All-inorganic cesium lead halide perovskite colloidal nanocrystals are attractive for next-generation light-emitting diodes because of their high color purity, but the nonradiative Auger recombination in perovskite nanocrystal film limits the efficiency and brightness of the fabricated devices. Here, we introduce a surface-engineering process to exchange the original long-chain oleic acid/oleylamine ligands by the cerium-tributylphosphine oxide hybrid ligands to suppress nonradiative Auger recombination in CsPbBr3 NC film for bright and low-efficiency roll-off light-emitting diodes. Using ultrafast transient absorption and time-resolved photoluminescence spectroscopy, we demonstrate that the hybrid ligand passivation can efficiently remove surface trap states to enhance radiative recombination and homogenize the exciton concentration to suppress nonradiative Auger recombination in the CsPbBr3 nanocrystal thin film. Consequently, we fabricate a light-emitting diode with efficient charge injection into the CsPbBr3 nanocrystal emitting layer, achieving a pronounced improvement of electroluminescence with an external quantum efficiency from 5.5% to 9.1%. More importantly, the efficiency roll-off characteristics of high-brightness light-emitting diodes is effectively mitigated. Our reported hybrid ligand passivation suppressed Auger recombination strategy shows a great potential for fabricating high-brightness cesium lead halide perovskite light-emitting diodes. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/64929]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | J. S. Yao,J. C. Zhang,L. Wang,K. H. Wang,X. C. Ru,J. N. Yang,J. J. Wang,X. Chen,Y. H. Song,Y. C. Yin,Y. F. Lan,Q. Zhang and H. B. Yao. Suppressing Auger Recombination in Cesium Lead Bromide Perovskite Nanocrystal Film for Bright Light-Emitting Diodes[J]. Journal of Physical Chemistry Letters,2020,11(21):9371-9378. |
| APA | J. S. Yao,J. C. Zhang,L. Wang,K. H. Wang,X. C. Ru,J. N. Yang,J. J. Wang,X. Chen,Y. H. Song,Y. C. Yin,Y. F. Lan,Q. Zhang and H. B. Yao.(2020).Suppressing Auger Recombination in Cesium Lead Bromide Perovskite Nanocrystal Film for Bright Light-Emitting Diodes.Journal of Physical Chemistry Letters,11(21),9371-9378. |
| MLA | J. S. Yao,J. C. Zhang,L. Wang,K. H. Wang,X. C. Ru,J. N. Yang,J. J. Wang,X. Chen,Y. H. Song,Y. C. Yin,Y. F. Lan,Q. Zhang and H. B. Yao."Suppressing Auger Recombination in Cesium Lead Bromide Perovskite Nanocrystal Film for Bright Light-Emitting Diodes".Journal of Physical Chemistry Letters 11.21(2020):9371-9378. |
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