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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202309335
|2 doi
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|a pubmed24n1277.xml
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a Jang, Gyumin
|e verfasserin
|4 aut
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|a Core-Shell Perovskite Quantum Dots for Highly Selective Room-Temperature Spin Light-Emitting Diodes
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|c 2024
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 01.02.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Circularly polarized light (CPL) is a crucial light source with a wide variety of potential applications such as magnetic recording, and 3D display. Here, core-shell heterostructured perovskite quantum dots (QDs) for room-temperature spin-polarized light-emitting diodes (spin-LEDs) are developed. Specifically, a 2D chiral perovskite shell is deposited onto the achiral 3D inorganic perovskite (CsPbBr3 ) core. Owing to the chiral-induced spin selectivity effect, the spin state of the injected charge carriers is biased when they are transmitted through the 2D chiral shell. The spin-controlled carriers then radiatively recombine inside the CsPbBr3 emissive core, resulting in CPL emission. It is demonstrated that the (R)- and (S)-1-(2-(naphthyl)ethylamine) (R-/S-NEA) 2D chiral cations enhance the spin polarization degree due to their strong chiroptical properties. Systematical defect analyses confirm that 2D chiral cations (i.e., R-/S-NEA) successfully passivate halide vacancies at the surface of the CsPbBr3 QDs, thereby attaining a high photoluminescence quantum yield of 78%. Moreover, the spin-LEDs prepared with core-shell QDs achieve a maximum external quantum efficiency of 5.47% and circularly polarized electroluminescence with a polarization degree (PCP-EL ) of 12% at room temperature. Finally, various patterns fabricated by inkjet printing the core-shell QDs emit strong CPL, highlighting their potential as an emitter for next-generation displays
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|a Journal Article
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|a chiral-induced spin selectivity
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|a core-shell
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|a nanocrystals
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4 |
|a perovskite
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4 |
|a spin-LEDs
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1 |
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|a Jo, Dae-Yeon
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ma, Sunihl
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lee, Junwoo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Son, Jaehyun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lee, Chan Uk
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jeong, Wooyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Seongyeon
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Park, Jeong Hyun
|e verfasserin
|4 aut
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|a Yang, Heesun
|e verfasserin
|4 aut
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| 700 |
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|a Moon, Jooho
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 5 vom: 24. Feb., Seite e2309335
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:36
|g year:2024
|g number:5
|g day:24
|g month:02
|g pages:e2309335
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|u http://dx.doi.org/10.1002/adma.202309335
|3 Volltext
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