Efficient generation of emissive many-body correlations in copper-doped colloidal quantum wells
| Autor: | Junhong Yu, Manoj Sharma, Mingjie Li, Baiquan Liu, Pedro Ludwig Hernández-Martínez, Savas Delikanli, Ashma Sharma, Yemliha Altintas, Chathuranga Hettiarachchi, Tze Chien Sum, Hilmi Volkan Demir, Cuong Dang |
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| Přispěvatelé: | AGÜ, Mühendislik Fakültesi, Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü, Altintas, Yemliha, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays, Centre for OptoElectronics and Biophotonics, The Photonics Institute, CNRS International NTU THALES Research Alliances, Hernandez Martinez, Pedro Ludwig, Delikanlı, Savaş, Demir, Hilmi Volkan |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
High-Order Excitonic States
OPTICAL GAIN DOTS General Engineering General Physics and Astronomy General Chemistry Colloidal Quantum Wells AUGER RECOMBINATION CDSE NANOPLATELETS BIEXCITON General Energy THRESHOLDDOTS Colloidal nanocrystals Electrical and electronic engineering [Engineering] Copper doping General Materials Science Ultrafast spectroscopy |
| Zdroj: | Cell Reports Physical Science |
| Popis: | 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. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Published version C.D. is grateful for the financial support from the Ministry of Education, Singapore, under its AcRF Tier 2 grant (MOE-T2EP50121-0012). H.V.D. acknowledges the financial support in part from the Singapore Agency for Science, Technology and Research (A*STAR) MTC program under grant no. M21J9b0085, the Ministry of Education, Singapore, under its Academic Research Fund Tier 1 (MOE-RG62/20), and in part from TUBITAK 119N343, 20AG001, 121N395, and 121C266. H.V.D. also acknowledges support from TUBA and TUBITAK 2247-A National Leader Researchers Program (121C266). M.S. also acknowledges the funding through the Australian Research Council Center of Excellence in Exciton Science (grant no. CE170100026). |
| Databáze: | OpenAIRE |
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