Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution

Elena V. Ushakova; Aleksandr P. Litvin; Peter S. Parfenov; Anatoly V. Fedorov; Mikhail Artemyev; Anatoly V. Prudnikau; Ivan D. Rukhlenko; Alexander V. Baranov

doi:10.1021/nn3029106

Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution

Elena V. Ushakova
, Aleksandr P. Litvin
, Peter S. Parfenov
, Anatoly V. Fedorov
, Mikhail Artemyev
, Anatoly V. Prudnikau
, Ivan D. Rukhlenko
, Alexander V. Baranov^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

108 Citations (Scopus)

Abstract

We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots. © 2012 American Chemical Society.

Original language	English
Pages (from-to)	8913-8921
Journal	ACS Nano
Volume	6
Issue number	10
Online published	12 Sept 2012
DOIs	https://doi.org/10.1021/nn3029106
Publication status	Published - 23 Oct 2012
Externally published	Yes

Research Keywords

in-gap electronic state
near-infrared
PbS quantum dots
phonon-induced transitions
photoluminescence decay
quantum transition dynamics
size dependence

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@article{a7b7939855054e68ab34905ae5aac461,

title = "Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution",

abstract = "We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots. {\textcopyright} 2012 American Chemical Society.",

keywords = "in-gap electronic state, near-infrared, PbS quantum dots, phonon-induced transitions, photoluminescence decay, quantum transition dynamics, size dependence",

author = "Ushakova, \{Elena V.\} and Litvin, \{Aleksandr P.\} and Parfenov, \{Peter S.\} and Fedorov, \{Anatoly V.\} and Mikhail Artemyev and Prudnikau, \{Anatoly V.\} and Rukhlenko, \{Ivan D.\} and Baranov, \{Alexander V.\}",

year = "2012",

month = oct,

day = "23",

doi = "10.1021/nn3029106",

language = "English",

volume = "6",

pages = "8913--8921",

journal = "ACS Nano",

issn = "1936-0851",

publisher = "American Chemical Society",

number = "10",

}

TY - JOUR

T1 - Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution

AU - Ushakova, Elena V.

AU - Litvin, Aleksandr P.

AU - Parfenov, Peter S.

AU - Fedorov, Anatoly V.

AU - Artemyev, Mikhail

AU - Prudnikau, Anatoly V.

AU - Rukhlenko, Ivan D.

AU - Baranov, Alexander V.

PY - 2012/10/23

Y1 - 2012/10/23

N2 - We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots. © 2012 American Chemical Society.

AB - We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots. © 2012 American Chemical Society.

KW - in-gap electronic state

KW - near-infrared

KW - PbS quantum dots

KW - phonon-induced transitions

KW - photoluminescence decay

KW - quantum transition dynamics

KW - size dependence

UR - https://www.scopus.com/pages/publications/84867775589

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84867775589&origin=recordpage

U2 - 10.1021/nn3029106

DO - 10.1021/nn3029106

M3 - RGC 21 - Publication in refereed journal

C2 - 22971234

SN - 1936-0851

VL - 6

SP - 8913

EP - 8921

JO - ACS Nano

JF - ACS Nano

IS - 10

ER -

Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution

Abstract

Research Keywords

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