Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light

Copper-doped colloidal quantum wells (Cu-CQWs) are considered a new class of optoelectronic materials. To date, the electroluminescence (EL) property of Cu-CQWs has not been revealed. Additionally, it is desirable to achieve ultrapure green, tunable dual-emission and white light to satisfy the vario...

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Main Authors: Liu, Baiquan, Sharma, Manoj, Yu, Junhong, Shendre, Sushant, Hettiarachchi, Chathuranga, Sharma, Ashma, Yeltik, Aydan, Wang, Lin, Sun, Handong, Dang, Cuong, 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/10356/140117
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1401172023-02-28T19:46:13Z Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light Liu, Baiquan Sharma, Manoj Yu, Junhong Shendre, Sushant Hettiarachchi, Chathuranga Sharma, Ashma Yeltik, Aydan Wang, Lin Sun, Handong Dang, Cuong Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences The Photonics Institute Luminous! Centre of Excellence for Semiconductor Lighting and Displays Centre for OptoElectronics and Biophotonics Engineering::Electrical and electronic engineering Colloidal Quantum Wells Dual Emission Copper-doped colloidal quantum wells (Cu-CQWs) are considered a new class of optoelectronic materials. To date, the electroluminescence (EL) property of Cu-CQWs has not been revealed. Additionally, it is desirable to achieve ultrapure green, tunable dual-emission and white light to satisfy the various requirement of display and lighting applications. Herein, light-emitting diodes (LEDs) based on colloidal Cu-CQWs are demonstrated. For the 0% Cu-doped concentration, the LED exhibits Commission Internationale de L'Eclairage 1931 coordinates of (0.103, 0.797) with a narrow EL full-wavelength at half-maximum of 12 nm. For the 0.5% Cu-doped concentration, a dual-emission LED is realized. Remarkably, the dual emission can be tuned by manipulating the device engineering. Furthermore, at a high doping concentration of 2.4%, a white LED based on CQWs is developed. With the management of doping concentrations, the color tuning (green, dual-emission to white) is shown. The findings not only show that LEDs with CQWs can exhibit polychromatic emission but also unlock a new direction to develop LEDs by exploiting 2D impurity-doped CQWs that can be further extended to the application of other impurities (e.g., Mn, Ag). NRF (Natl Research Foundation, S’pore) ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2020-05-26T08:20:25Z 2020-05-26T08:20:25Z 2019 Journal Article Liu, B., Sharma, M., Yu, J., Shendre, S., Hettiarachchi, C., Sharma, A., . . . Demir, H. V. (2019). Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light. Small, 15(38), 1901983-. doi:10.1002/smll.201901983 1613-6810 https://hdl.handle.net/10356/140117 10.1002/smll.201901983 31379086 2-s2.0-85070200815 38 15 en Small This is the accepted version of the following article: Liu, B., Sharma, M., Yu, J., Shendre, S., Hettiarachchi, C., Sharma, A., . . . Demir, H. V. (2019). Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light. Small, 15(38), 1901983-, which has been published in final form at doi:10.1002/smll.201901983. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html]. 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::Electrical and electronic engineering
Colloidal Quantum Wells
Dual Emission
spellingShingle Engineering::Electrical and electronic engineering
Colloidal Quantum Wells
Dual Emission
Liu, Baiquan
Sharma, Manoj
Yu, Junhong
Shendre, Sushant
Hettiarachchi, Chathuranga
Sharma, Ashma
Yeltik, Aydan
Wang, Lin
Sun, Handong
Dang, Cuong
Demir, Hilmi Volkan
Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
description Copper-doped colloidal quantum wells (Cu-CQWs) are considered a new class of optoelectronic materials. To date, the electroluminescence (EL) property of Cu-CQWs has not been revealed. Additionally, it is desirable to achieve ultrapure green, tunable dual-emission and white light to satisfy the various requirement of display and lighting applications. Herein, light-emitting diodes (LEDs) based on colloidal Cu-CQWs are demonstrated. For the 0% Cu-doped concentration, the LED exhibits Commission Internationale de L'Eclairage 1931 coordinates of (0.103, 0.797) with a narrow EL full-wavelength at half-maximum of 12 nm. For the 0.5% Cu-doped concentration, a dual-emission LED is realized. Remarkably, the dual emission can be tuned by manipulating the device engineering. Furthermore, at a high doping concentration of 2.4%, a white LED based on CQWs is developed. With the management of doping concentrations, the color tuning (green, dual-emission to white) is shown. The findings not only show that LEDs with CQWs can exhibit polychromatic emission but also unlock a new direction to develop LEDs by exploiting 2D impurity-doped CQWs that can be further extended to the application of other impurities (e.g., Mn, Ag).
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Liu, Baiquan
Sharma, Manoj
Yu, Junhong
Shendre, Sushant
Hettiarachchi, Chathuranga
Sharma, Ashma
Yeltik, Aydan
Wang, Lin
Sun, Handong
Dang, Cuong
Demir, Hilmi Volkan
format Article
author Liu, Baiquan
Sharma, Manoj
Yu, Junhong
Shendre, Sushant
Hettiarachchi, Chathuranga
Sharma, Ashma
Yeltik, Aydan
Wang, Lin
Sun, Handong
Dang, Cuong
Demir, Hilmi Volkan
author_sort Liu, Baiquan
title Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
title_short Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
title_full Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
title_fullStr Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
title_full_unstemmed Light-emitting diodes with Cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
title_sort light-emitting diodes with cu-doped colloidal quantum wells : from ultrapure green, tunable dual-emission to white light
publishDate 2020
url https://hdl.handle.net/10356/140117
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