Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes

Lead-halide perovskites have been attracting attention for potential use in solid-state lighting. Following the footsteps of solar cells, the field of perovskite light-emitting diodes (PeLEDs) has been growing rapidly. Their application prospects in lighting, however, remain still uncertain due to a...

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Main Authors: Yan, Fei, Xing, Jun, Xing, Guichuan, Quan, Lina, Tan, Swee Tiam, Zhao, Jiaxin, Su, Rui, Zhang, Lulu, Chen, Shi, Zhao, Yawen, Huan, Alfred, Sargent, Edward H., Xiong, Qihua, Demir, Hilmi Volkan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/140398
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1403982023-02-28T19:25:25Z Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes Yan, Fei Xing, Jun Xing, Guichuan Quan, Lina Tan, Swee Tiam Zhao, Jiaxin Su, Rui Zhang, Lulu Chen, Shi Zhao, Yawen Huan, Alfred Sargent, Edward H. Xiong, Qihua Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays The Photonics Institute NOVITAS, Nanoelectronics Centre of Excellence MajuLab, CNRS-UCA-SU-NUS-NTU International Joint Research Unit Science::Physics Colloidal Nanocrystal Lead-halide Perovskite Lead-halide perovskites have been attracting attention for potential use in solid-state lighting. Following the footsteps of solar cells, the field of perovskite light-emitting diodes (PeLEDs) has been growing rapidly. Their application prospects in lighting, however, remain still uncertain due to a variety of shortcomings in device performance including their limited levels of luminous efficiency achievable thus far. Here we show high-efficiency PeLEDs based on colloidal perovskite nanocrystals (PeNCs) synthesized at room temperature possessing dominant first-order excitonic radiation (enabling a photoluminescence quantum yield of 71% in solid film), unlike in the case of bulk perovskites with slow electron–hole bimolecular radiative recombination (a second-order process). In these PeLEDs, by reaching charge balance in the recombination zone, we find that the Auger nonradiative recombination, with its significant role in emission quenching, is effectively suppressed in low driving current density range. In consequence, these devices reach a maximum external quantum efficiency of 12.9% and a power efficiency of 30.3 lm W–1 at luminance levels above 1000 cd m–2 as required for various applications. These findings suggest that, with feasible levels of device performance, the PeNCs hold great promise for their use in LED lighting and displays. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-05-28T09:08:49Z 2020-05-28T09:08:49Z 2018 Journal Article Yan, F., Xing, J., Xing, G., Quan, L., Tan, S. T., Zhao, J., . . . Demir, H. V. (2018). Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes. Nano Letters, 18(5), 3157-3164. doi:10.1021/acs.nanolett.8b00789 1530-6984 https://hdl.handle.net/10356/140398 10.1021/acs.nanolett.8b00789 29608317 2-s2.0-85046649606 5 18 3157 3164 en Nano Letters This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.8b00789 application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Colloidal Nanocrystal
Lead-halide Perovskite
spellingShingle Science::Physics
Colloidal Nanocrystal
Lead-halide Perovskite
Yan, Fei
Xing, Jun
Xing, Guichuan
Quan, Lina
Tan, Swee Tiam
Zhao, Jiaxin
Su, Rui
Zhang, Lulu
Chen, Shi
Zhao, Yawen
Huan, Alfred
Sargent, Edward H.
Xiong, Qihua
Demir, Hilmi Volkan
Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
description Lead-halide perovskites have been attracting attention for potential use in solid-state lighting. Following the footsteps of solar cells, the field of perovskite light-emitting diodes (PeLEDs) has been growing rapidly. Their application prospects in lighting, however, remain still uncertain due to a variety of shortcomings in device performance including their limited levels of luminous efficiency achievable thus far. Here we show high-efficiency PeLEDs based on colloidal perovskite nanocrystals (PeNCs) synthesized at room temperature possessing dominant first-order excitonic radiation (enabling a photoluminescence quantum yield of 71% in solid film), unlike in the case of bulk perovskites with slow electron–hole bimolecular radiative recombination (a second-order process). In these PeLEDs, by reaching charge balance in the recombination zone, we find that the Auger nonradiative recombination, with its significant role in emission quenching, is effectively suppressed in low driving current density range. In consequence, these devices reach a maximum external quantum efficiency of 12.9% and a power efficiency of 30.3 lm W–1 at luminance levels above 1000 cd m–2 as required for various applications. These findings suggest that, with feasible levels of device performance, the PeNCs hold great promise for their use in LED lighting and displays.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Yan, Fei
Xing, Jun
Xing, Guichuan
Quan, Lina
Tan, Swee Tiam
Zhao, Jiaxin
Su, Rui
Zhang, Lulu
Chen, Shi
Zhao, Yawen
Huan, Alfred
Sargent, Edward H.
Xiong, Qihua
Demir, Hilmi Volkan
format Article
author Yan, Fei
Xing, Jun
Xing, Guichuan
Quan, Lina
Tan, Swee Tiam
Zhao, Jiaxin
Su, Rui
Zhang, Lulu
Chen, Shi
Zhao, Yawen
Huan, Alfred
Sargent, Edward H.
Xiong, Qihua
Demir, Hilmi Volkan
author_sort Yan, Fei
title Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
title_short Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
title_full Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
title_fullStr Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
title_full_unstemmed Highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
title_sort highly efficient visible colloidal lead-halide perovskite nanocrystal light-emitting diodes
publishDate 2020
url https://hdl.handle.net/10356/140398
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