Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures
Recently, there has been tremendous interest in the synthesis and optoelectronic applications of quasi-two-dimensional colloidal nanoplatelets (NPLs). Thanks to the ultranarrow emission linewidth, high-extinction coefficient, and high photostability, NPLs offer an exciting opportunity for high-perfo...
Saved in:
Main Authors: | , , , , , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/146982 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-146982 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1469822021-03-22T08:42:36Z Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures Altintas, Yemliha Liu, Baiquan Hernández-Martínez, Pedro Ludwig Gheshlaghi, Negar Shabani, Farzan Sharma, Manoj Wang, Lin Sun, Handong Mutlugun, Evren Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Materials Science and Engineering School of Physical and Mathematical Sciences LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays Engineering::Materials Color Alloying Recently, there has been tremendous interest in the synthesis and optoelectronic applications of quasi-two-dimensional colloidal nanoplatelets (NPLs). Thanks to the ultranarrow emission linewidth, high-extinction coefficient, and high photostability, NPLs offer an exciting opportunity for high-performance optoelectronics. However, until now, the applications of these NPLs are limited to available discrete emission ranges, limiting the full potential of these exotic materials as efficient light emitters. Here, we introduce a detailed systematic study on the synthesis of NPLs based on the alloying mechanisms in core/shell, core/alloyed shell, alloyed core/shell, and alloyed core/alloyed shell heterostructures. Through the engineering of the band gap supported by the theoretical calculations, we carefully designed and successfully synthesized the NPL emitters with continuously tunable emission. Unlike conventional NPLs showing discrete emission, here, we present highly efficient core/shell NPLs with fine spectral tunability from green to deep-red spectra. As an important demonstration of these efficient emitters, the first-time implementation of yellow NPL light-emitting diodes (LEDs) has been reported with record device performance, including the current efficiency surpassing 18.2 cd A-1, power efficiency reaching 14.8 lm W-1, and record luminance exceeding 46 900 cd m-2. This fine and wide-range color tunability in the visible range from stable and efficient core/shell NPLs is expected to be extremely important for the optoelectronic applications of the family of colloidal NPL emitters. Agency for Science, Technology and Research (A*STAR) National Research Foundation (NRF) Accepted version The authors acknowledge the financial support from the Singapore National Research Foundation under the programs (NRF-NRFI2016-08) and Agency for Science, Technology and Research (A*STAR) of Singapore and also partially from TUBITAK 115E679, 115F297 and 117E713. H.V.D. and E.M. acknowledge the support from TUBA and TUBA-GEBIP, respectively. 2021-03-22T08:42:35Z 2021-03-22T08:42:35Z 2020 Journal Article Altintas, Y., Liu, B., Hernández-Martínez, P. L., Gheshlaghi, N., Shabani, F., Sharma, M., Wang, L., Sun, H., Mutlugun, E. & Demir, H. V. (2020). Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures. Chemistry of Materials, 32(18), 7874-7883. https://dx.doi.org/10.1021/acs.chemmater.0c02630 1520-5002 0000-0001-5761-9654 0000-0001-5215-9740 0000-0002-2261-7103 0000-0003-3715-5594 0000-0003-1793-112X https://hdl.handle.net/10356/146982 10.1021/acs.chemmater.0c02630 2-s2.0-85093088485 18 32 7874 7883 en Chemistry of Materials This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, 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.chemmater.0c02630 application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
Engineering::Materials Color Alloying |
spellingShingle |
Engineering::Materials Color Alloying Altintas, Yemliha Liu, Baiquan Hernández-Martínez, Pedro Ludwig Gheshlaghi, Negar Shabani, Farzan Sharma, Manoj Wang, Lin Sun, Handong Mutlugun, Evren Demir, Hilmi Volkan Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
description |
Recently, there has been tremendous interest in the synthesis and optoelectronic applications of quasi-two-dimensional colloidal nanoplatelets (NPLs). Thanks to the ultranarrow emission linewidth, high-extinction coefficient, and high photostability, NPLs offer an exciting opportunity for high-performance optoelectronics. However, until now, the applications of these NPLs are limited to available discrete emission ranges, limiting the full potential of these exotic materials as efficient light emitters. Here, we introduce a detailed systematic study on the synthesis of NPLs based on the alloying mechanisms in core/shell, core/alloyed shell, alloyed core/shell, and alloyed core/alloyed shell heterostructures. Through the engineering of the band gap supported by the theoretical calculations, we carefully designed and successfully synthesized the NPL emitters with continuously tunable emission. Unlike conventional NPLs showing discrete emission, here, we present highly efficient core/shell NPLs with fine spectral tunability from green to deep-red spectra. As an important demonstration of these efficient emitters, the first-time implementation of yellow NPL light-emitting diodes (LEDs) has been reported with record device performance, including the current efficiency surpassing 18.2 cd A-1, power efficiency reaching 14.8 lm W-1, and record luminance exceeding 46 900 cd m-2. This fine and wide-range color tunability in the visible range from stable and efficient core/shell NPLs is expected to be extremely important for the optoelectronic applications of the family of colloidal NPL emitters. |
author2 |
School of Electrical and Electronic Engineering |
author_facet |
School of Electrical and Electronic Engineering Altintas, Yemliha Liu, Baiquan Hernández-Martínez, Pedro Ludwig Gheshlaghi, Negar Shabani, Farzan Sharma, Manoj Wang, Lin Sun, Handong Mutlugun, Evren Demir, Hilmi Volkan |
format |
Article |
author |
Altintas, Yemliha Liu, Baiquan Hernández-Martínez, Pedro Ludwig Gheshlaghi, Negar Shabani, Farzan Sharma, Manoj Wang, Lin Sun, Handong Mutlugun, Evren Demir, Hilmi Volkan |
author_sort |
Altintas, Yemliha |
title |
Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
title_short |
Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
title_full |
Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
title_fullStr |
Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
title_full_unstemmed |
Spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2D nanoplatelets enabled by engineered alloyed heterostructures |
title_sort |
spectrally wide-range-tunable, efficient, and bright colloidal light-emitting diodes of quasi-2d nanoplatelets enabled by engineered alloyed heterostructures |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/146982 |
_version_ |
1695706219886411776 |