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- Publisher Website: 10.1002/adma.202304094
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Article: Unraveling Size‐Dependent Ion‐Migration for Stable Mixed‐Halide Perovskite Light‐Emitting Diodes
Title | Unraveling Size‐Dependent Ion‐Migration for Stable Mixed‐Halide Perovskite Light‐Emitting Diodes |
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Authors | |
Keywords | deep-blue emission light-emitting diodes mixed-halide perovskites quantum dots spectral stability |
Issue Date | 27-Sep-2023 |
Publisher | Wiley |
Citation | Advanced Materials, 2023, v. 35, n. 39 How to Cite? |
Abstract | Mixed-halide perovskites show tunable emission wavelength across the visible-light range, with optimum control of the light color. However, color stability remains limited due to the notorious halide segregation under illumination or an electric field. Here, a versatile path toward high-quality mixed-halide perovskites with high emission properties and resistance to halide segregation is presented. Through systematic in and ex situ characterizations, key features for this advancement are proposed: a slowed and controllable crystallization process can promote achievement of halide homogeneity, which in turn ensures thermodynamic stability; meanwhile, downsizing perovskite nanoparticle to nanometer-scale dimensions can enhance their resistance to external stimuli, strengthening the phase stability. Leveraging this strategy, devices are developed based on CsPbCl1.5Br1.5 perovskite that achieves a champion external quantum efficiency (EQE) of 9.8% at 464 nm, making it one of the most efficient deep-blue mixed-halide perovskite light-emitting diodes (PeLEDs) to date. Particularly, the device demonstrates excellent spectral stability, maintaining a constant emission profile and position for over 60 min of continuous operation. The versatility of this approach with CsPbBr1.5I1.5 PeLEDs is further showcased, achieving an impressive EQE of 12.7% at 576 nm. |
Persistent Identifier | http://hdl.handle.net/10722/338124 |
ISSN | 2023 Impact Factor: 27.4 2023 SCImago Journal Rankings: 9.191 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Jiang, Yuanzhi | - |
dc.contributor.author | Wei, Keyu | - |
dc.contributor.author | Sun, Changjiu | - |
dc.contributor.author | Feng, Yanxing | - |
dc.contributor.author | Zhang, Li | - |
dc.contributor.author | Cui, Minghuan | - |
dc.contributor.author | Li, Saisai | - |
dc.contributor.author | Li, Wen‐Di | - |
dc.contributor.author | Kim, Ji Tae | - |
dc.contributor.author | Qin, Chaochao | - |
dc.contributor.author | Yuan, Mingjian | - |
dc.date.accessioned | 2024-03-11T10:26:26Z | - |
dc.date.available | 2024-03-11T10:26:26Z | - |
dc.date.issued | 2023-09-27 | - |
dc.identifier.citation | Advanced Materials, 2023, v. 35, n. 39 | - |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.uri | http://hdl.handle.net/10722/338124 | - |
dc.description.abstract | <p>Mixed-halide perovskites show tunable emission wavelength across the visible-light range, with optimum control of the light color. However, color stability remains limited due to the notorious halide segregation under illumination or an electric field. Here, a versatile path toward high-quality mixed-halide perovskites with high emission properties and resistance to halide segregation is presented. Through systematic in and ex situ characterizations, key features for this advancement are proposed: a slowed and controllable crystallization process can promote achievement of halide homogeneity, which in turn ensures thermodynamic stability; meanwhile, downsizing perovskite nanoparticle to nanometer-scale dimensions can enhance their resistance to external stimuli, strengthening the phase stability. Leveraging this strategy, devices are developed based on CsPbCl<sub>1.5</sub>Br<sub>1.5</sub> perovskite that achieves a champion external quantum efficiency (EQE) of 9.8% at 464 nm, making it one of the most efficient deep-blue mixed-halide perovskite light-emitting diodes (PeLEDs) to date. Particularly, the device demonstrates excellent spectral stability, maintaining a constant emission profile and position for over 60 min of continuous operation. The versatility of this approach with CsPbBr<sub>1.5</sub>I<sub>1.5</sub> PeLEDs is further showcased, achieving an impressive EQE of 12.7% at 576 nm.<br></p> | - |
dc.language | eng | - |
dc.publisher | Wiley | - |
dc.relation.ispartof | Advanced Materials | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | deep-blue emission | - |
dc.subject | light-emitting diodes | - |
dc.subject | mixed-halide perovskites | - |
dc.subject | quantum dots | - |
dc.subject | spectral stability | - |
dc.title | Unraveling Size‐Dependent Ion‐Migration for Stable Mixed‐Halide Perovskite Light‐Emitting Diodes | - |
dc.type | Article | - |
dc.identifier.doi | 10.1002/adma.202304094 | - |
dc.identifier.scopus | eid_2-s2.0-85166919767 | - |
dc.identifier.volume | 35 | - |
dc.identifier.issue | 39 | - |
dc.identifier.eissn | 1521-4095 | - |
dc.identifier.isi | WOS:001042446600001 | - |
dc.identifier.issnl | 0935-9648 | - |