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CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion

Colloidal cesium lead halide (CsPbX(3), X = Cl, Br, and I) perovskite nanocrystals (NCs) demonstrate supreme optical properties in the spectra region of infrared, red, and green. High-performance blue-emitting counterparts are still eagerly required for next-generation full-color displays. However,...

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Detalles Bibliográficos
Autores principales: Zhang, Weizhuo, Li, Xin, Peng, Chencheng, Yang, Fei, Lian, Linyuan, Guo, Runda, Zhang, Jianbing, Wang, Lei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9231175/
https://www.ncbi.nlm.nih.gov/pubmed/35745367
http://dx.doi.org/10.3390/nano12122026
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author Zhang, Weizhuo
Li, Xin
Peng, Chencheng
Yang, Fei
Lian, Linyuan
Guo, Runda
Zhang, Jianbing
Wang, Lei
author_facet Zhang, Weizhuo
Li, Xin
Peng, Chencheng
Yang, Fei
Lian, Linyuan
Guo, Runda
Zhang, Jianbing
Wang, Lei
author_sort Zhang, Weizhuo
collection PubMed
description Colloidal cesium lead halide (CsPbX(3), X = Cl, Br, and I) perovskite nanocrystals (NCs) demonstrate supreme optical properties in the spectra region of infrared, red, and green. High-performance blue-emitting counterparts are still eagerly required for next-generation full-color displays. However, it is challenging to obtain efficient blue perovskite NCs, especially in a deep blue region with an emission wavelength of around 460 nm or shorter. Herein, calcium halide and ammonium ions are applied simultaneously to modify the CsPb(Br/Cl)(3) NCs in situ to reduce surface defects, finally remarkably enhancing the photoluminescence quantum yield (PLQY) from 13% to 93% with an emission peak at 455 nm and the Commission Internationale de l’Eclairage (CIE) coordinates at (0.147, 0.030), which is close to the requirement of the Rec.2020 standard and also meets the requirement of blue emission in DCI-P3. Bright white emission and a wide color gamut are also achieved by combining the commercial red-emitting and green-emitting phosphors. The combination of time-resolved PL spectra and femtosecond transient absorption results discloses the reason for PLQY improvement as suppressing the nonradiative recombination.
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spelling pubmed-92311752022-06-25 CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion Zhang, Weizhuo Li, Xin Peng, Chencheng Yang, Fei Lian, Linyuan Guo, Runda Zhang, Jianbing Wang, Lei Nanomaterials (Basel) Article Colloidal cesium lead halide (CsPbX(3), X = Cl, Br, and I) perovskite nanocrystals (NCs) demonstrate supreme optical properties in the spectra region of infrared, red, and green. High-performance blue-emitting counterparts are still eagerly required for next-generation full-color displays. However, it is challenging to obtain efficient blue perovskite NCs, especially in a deep blue region with an emission wavelength of around 460 nm or shorter. Herein, calcium halide and ammonium ions are applied simultaneously to modify the CsPb(Br/Cl)(3) NCs in situ to reduce surface defects, finally remarkably enhancing the photoluminescence quantum yield (PLQY) from 13% to 93% with an emission peak at 455 nm and the Commission Internationale de l’Eclairage (CIE) coordinates at (0.147, 0.030), which is close to the requirement of the Rec.2020 standard and also meets the requirement of blue emission in DCI-P3. Bright white emission and a wide color gamut are also achieved by combining the commercial red-emitting and green-emitting phosphors. The combination of time-resolved PL spectra and femtosecond transient absorption results discloses the reason for PLQY improvement as suppressing the nonradiative recombination. MDPI 2022-06-13 /pmc/articles/PMC9231175/ /pubmed/35745367 http://dx.doi.org/10.3390/nano12122026 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Weizhuo
Li, Xin
Peng, Chencheng
Yang, Fei
Lian, Linyuan
Guo, Runda
Zhang, Jianbing
Wang, Lei
CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title_full CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title_fullStr CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title_full_unstemmed CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title_short CsPb(Br/Cl)(3) Perovskite Nanocrystals with Bright Blue Emission Synergistically Modified by Calcium Halide and Ammonium Ion
title_sort cspb(br/cl)(3) perovskite nanocrystals with bright blue emission synergistically modified by calcium halide and ammonium ion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9231175/
https://www.ncbi.nlm.nih.gov/pubmed/35745367
http://dx.doi.org/10.3390/nano12122026
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