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Title: Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
Authors: Hu, Hongwei
Morris, Samuel Alexander
Qiao, Xianfeng
Zhao, Daming
Salim, Teddy
Chen, Bingbing
Chia, Elbert Ee Min
Lam, Yeng Ming
Keywords: Engineering::Materials
Issue Date: 2018
Source: Hu, H., Morris, S. A., Qiao, X., Zhao, D., Salim, T., Chen, B., . . . Lam, Y. M. (2018). Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes. Journal of Materials Chemistry C, 6(38), 10301-10307. doi:10.1039/c8tc03001d
Journal: Journal of Materials Chemistry C
Abstract: Two-dimensional (2D) hybrid perovskites exhibiting broadband light emission are attractive as down-converting phosphors in white light-emitting diodes (WLEDs). Despite active exploration of new members of this family of materials, fine-tuning of their emission through structural variation for realizing high color-rendering white light remains largely untapped. Here we report a series of (100)-oriented 2D perovskites whose structures are templated by the organic cations. By controlling the tilting of the inorganic octahedra, we were able to shift the broadband emission from blue to white. A photophysical study further suggests that the coexistence of self-trapped excitons and free excitons contributes to a double-peak broad emission, covering the entire visible spectrum. Using the broad-emitting perovskites as down-converting phosphors, we fabricated WLEDs with white-light emission having a correlated color temperature (CCT) of 6600 K and a high color rendering index (CRI, Ra) of 86.
ISSN: 2050-7526
DOI: 10.1039/C8TC03001D
Rights: © 2018 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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