Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes

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 realiz...

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Main Authors: Hu, Hongwei, Morris, Samuel Alexander, Qiao, Xianfeng, Zhao, Daming, Salim, Teddy, Chen, Bingbing, Chia, Elbert Ee Min, Lam, Yeng Ming
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/139407
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1394072020-06-01T10:13:58Z Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes Hu, Hongwei Morris, Samuel Alexander Qiao, Xianfeng Zhao, Daming Salim, Teddy Chen, Bingbing Chia, Elbert Ee Min Lam, Yeng Ming School of Materials Science & Engineering School of Physical and Mathematical Sciences Engineering::Materials Molecular Engineering Hybrid Perovskites 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. MOE (Min. of Education, S’pore) 2020-05-19T06:52:24Z 2020-05-19T06:52:24Z 2018 Journal Article 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 2050-7526 https://hdl.handle.net/10356/139407 10.1039/C8TC03001D 2-s2.0-85054496910 38 6 10301 10307 en Journal of Materials Chemistry C © 2018 The Royal Society of Chemistry. All rights reserved.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Materials
Molecular Engineering
Hybrid Perovskites
spellingShingle Engineering::Materials
Molecular Engineering
Hybrid Perovskites
Hu, Hongwei
Morris, Samuel Alexander
Qiao, Xianfeng
Zhao, Daming
Salim, Teddy
Chen, Bingbing
Chia, Elbert Ee Min
Lam, Yeng Ming
Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
description 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.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Hu, Hongwei
Morris, Samuel Alexander
Qiao, Xianfeng
Zhao, Daming
Salim, Teddy
Chen, Bingbing
Chia, Elbert Ee Min
Lam, Yeng Ming
format Article
author Hu, Hongwei
Morris, Samuel Alexander
Qiao, Xianfeng
Zhao, Daming
Salim, Teddy
Chen, Bingbing
Chia, Elbert Ee Min
Lam, Yeng Ming
author_sort Hu, Hongwei
title Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
title_short Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
title_full Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
title_fullStr Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
title_full_unstemmed Molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
title_sort molecular engineering of two-dimensional hybrid perovskites with broadband emission for white light-emitting diodes
publishDate 2020
url https://hdl.handle.net/10356/139407
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