Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/168692
Title: Efficient generation of emissive many-body correlations in copper-doped colloidal quantum wells
Authors: Yu, Junhong
Sharma, Manoj
Li, Mingjie
Liu, Baiquan
Hernández-Martínez, Pedro Ludwig
Delikanli, Savas
Sharma, Ashma
Altintas, Yemliha
Hettiarachchi, Chathuranga
Sum, Tze Chien
Demir, Hilmi Volkan
Dang, Cuong
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Yu, J., Sharma, M., Li, M., Liu, B., Hernández-Martínez, P. L., Delikanli, S., Sharma, A., Altintas, Y., Hettiarachchi, C., Sum, T. C., Demir, H. V. & Dang, C. (2022). Efficient generation of emissive many-body correlations in copper-doped colloidal quantum wells. Cell Reports Physical Science, 3(9), 101049-. https://dx.doi.org/10.1016/j.xcrp.2022.101049
Project: MOE-T2EP50121-0012 
M21J9b0085 
MOE-RG62/20 
Journal: Cell Reports Physical Science 
Abstract: Colloidal quantum wells (CQWs) provide an appealing platform to achieve emissive many-body correlations for novel optoelectronic devices, given that they act as hosts for strong carrier Coulomb interactions and present suppressed Auger recombination. However, the demonstrated high-order excitonic emission in CQWs requires ultrafast pumping with high excitation levels and can only be spectrally resolved at the single-particle level under cryogenic conditions. Here, through systematic investigation using static power-dependent emission spectroscopy and transient carrier dynamics, we show that Cu-doped CdSe CQWs exhibit continuous-wave-pumped high-order excitonic emission at room temperature with a large binding energy of ∼64 meV. We attribute this unique behavior to dopant excitons in which the ultralong lifetime and the highly localized wavefunction facilitate the formation of many-body correlations. The spectrally resolved high-order excitonic emission generated at power levels compatible with solar irradiation and electrical injection might pave the way for novel solution-processed solid-state devices.
URI: https://hdl.handle.net/10356/168692
ISSN: 2666-3864
DOI: 10.1016/j.xcrp.2022.101049
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Research Centres: LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays 
Centre for OptoElectronics and Biophotonics
The Photonics Institute 
CNRS International NTU THALES Research Alliances 
Rights: © 2022 The Authors. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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