ACS Nano, volume 9, issue 10, pages 10386-10393
Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots.
2
Center for High Technology Materials, University of New Mexico, Albuquerque, New Mexico 87131, United States
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Publication type: Journal Article
Publication date: 2015-09-08
General Physics and Astronomy
General Materials Science
General Engineering
Abstract
Lead-halide-based perovskites have been the subject of numerous recent studies largely motivated by their exceptional performance in solar cells. Electronic and optical properties of these materials have been commonly controlled by varying the composition (e.g., the halide component) and/or crystal structure. Use of nanostructured forms of perovskites can provide additional means for tailoring their functionalities via effects of quantum confinement and wave function engineering. Furthermore, it may enable applications that explicitly rely on the quantum nature of electronic excitations. Here, we demonstrate that CsPbX3 quantum dots (X = I, Br) can serve as room-temperature sources of quantum light, as indicated by strong photon antibunching detected in single-dot photoluminescence measurements. We explain this observation by the presence of fast nonradiative Auger recombination, which renders multiexciton states virtually nonemissive and limits the fraction of photon coincidence events to ∼6% on average. We analyze limitations of these quantum dots associated with irreversible photodegradation and fluctuations ("blinking") of the photoluminescence intensity. On the basis of emission intensity-lifetime correlations, we assign the "blinking" behavior to random charging/discharging of the quantum dot driven by photoassisted ionization. This study suggests that perovskite quantum dots hold significant promise for applications such as quantum emitters; however, to realize this goal, one must resolve the problems of photochemical stability and photocharging. These problems are largely similar to those of more traditional quantum dots and, hopefully, can be successfully resolved using advanced methodologies developed over the years in the field of colloidal nanostructures.
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Park Y. S. et al. Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots. // ACS Nano. 2015. Vol. 9. No. 10. pp. 10386-10393.
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Park Y. S., Guo S., Makarov N., Klimov V. I. Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots. // ACS Nano. 2015. Vol. 9. No. 10. pp. 10386-10393.
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TY - JOUR
DO - 10.1021/acsnano.5b04584
UR - https://doi.org/10.1021/acsnano.5b04584
TI - Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots.
T2 - ACS Nano
AU - Park, Y S
AU - Guo, Shaojun
AU - Makarov, Nikolay
AU - Klimov, Victor I.
PY - 2015
DA - 2015/09/08 00:00:00
PB - American Chemical Society (ACS)
SP - 10386-10393
IS - 10
VL - 9
SN - 1936-0851
SN - 1936-086X
ER -
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@article{2015_Park,
author = {Y S Park and Shaojun Guo and Nikolay Makarov and Victor I. Klimov},
title = {Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots.},
journal = {ACS Nano},
year = {2015},
volume = {9},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/acsnano.5b04584},
number = {10},
pages = {10386--10393},
doi = {10.1021/acsnano.5b04584}
}
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MLA
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Park, Y. S., et al. “Room Temperature Single-Photon Emission from Individual Perovskite Quantum Dots..” ACS Nano, vol. 9, no. 10, Sep. 2015, pp. 10386-10393. https://doi.org/10.1021/acsnano.5b04584.