Imperial College London
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ProfessorRiccardoSapienza

Faculty of Natural Sciences, Department of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 9577r.sapienza Website

 
 
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Location

 

B913Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{Morozov:2020,
author = {Morozov, S and Pensa, EL and Khan, AH and Polovitsyn, A and Cortes, E and Maier, SA and Vezzoli, S and Moreels, I and Sapienza, R},
publisher = {arXiv},
title = {Electrical control of single-photon emission in highly-charged individual colloidal quantum dots},
url = {http://arxiv.org/abs/2003.06382v1},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - Electron transfer to an individual quantum dot promotes the formation ofcharged excitons with enhanced recombination pathways and reduced lifetimes.Excitons with only one or two extra charges have allowed for the development ofvery efficient quantum dot lasing [1] and the understanding of blinkingdynamics [2], while charge transfer management has yielded single quantum dotLEDs [3], LEDs with reduced efficiency roll-off [4], and enabled studies ofcarrier and spin dynamics [5]. Here, by room-temperature time-resolvedexperiments on individual giant-shell CdSe/CdS quantum dots, we show theelectrochemical formation of highly charged excitons containing more thantwelve electrons and one hole. We report control of intensity blinking, as wellas a deterministic manipulation of quantum dot photodynamics, with an observed210-fold increase of the decay rate, accompanied by 12-fold decrease of theemission intensity, all while preserving single-photon emissioncharacteristics. These results pave the way for deterministic control over thecharge state, and room-temperature decay-rate engineering for colloidal quantumdot-based classical and quantum communication technologies.
AU  - Morozov,S
AU  - Pensa,EL
AU  - Khan,AH
AU  - Polovitsyn,A
AU  - Cortes,E
AU  - Maier,SA
AU  - Vezzoli,S
AU  - Moreels,I
AU  - Sapienza,R
PB  - arXiv
PY  - 2020///
TI  - Electrical control of single-photon emission in highly-charged individual colloidal quantum dots
UR  - http://arxiv.org/abs/2003.06382v1
UR  - http://hdl.handle.net/10044/1/77484
ER  -
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