Zhang, M, Bi, C, Xia, Y et al. (7 more authors) (2023) Water-Driven Synthesis of Deep-Blue Perovskite Colloidal Quantum Wells for Electroluminescent Devices. Angewandte Chemie, 62 (12). e202300149. ISSN 0044-8249
Abstract
Perovskite colloidal quantum wells (QWs) are promising to realize narrow deep-blue emission, but the poor optical performance and stability suppress their practical application. Here, we creatively propose a water-driven synthesis strategy to obtain size-homogenized and strongly confined deep-blue CsPbBr3 QWs, corresponding to three monolayers, which emit at the deep-blue wavelength of 456 nm. The water controls the orientation and distribution of the ligands on the surface of the nanocrystals, thus inducing orientated growth through the Ostwald ripening process by phagocytizing unstable nanocrystals to form well-crystallized QWs. These QWs present remarkable stability and high photoluminescence quantum yield of 94 %. Furthermore, we have prepared light-emitting diodes based on the QWs via the all-solution fabrication strategy, achieving an external quantum efficiency of 1 % and luminance of 2946 cd m−2, demonstrating state-of-the-art brightness for perovskite QW-based LEDs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. This is the peer reviewed version of the following article: Zhang, M., Bi, C., Xia, Y., Sun, X., Wang, X., Liu, A., Tian, S., Liu, X., de Leeuw, N. H., Tian, J., Angew. Chem. Int. Ed. 2023, 62, e202300149; Angew. Chem. 2023, 135, e202300149., which has been published in final form at https://doi.org/10.1002/anie.202300149. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
Dates: |
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Institution: | The University of Leeds |
Depositing User: | Symplectic Publications |
Date Deposited: | 31 Jan 2023 14:41 |
Last Modified: | 24 Jan 2024 01:13 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/anie.202300149 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:195665 |