Exciton localization and migration in individual CdSe quantum wires at low temperatures

J. J. Glennon; R. Tang; W. E. Buhro; R. A. Loomis; D. A. Bussian; H. Htoon; V. I. Klimov

doi:10.1103/PhysRevB.80.081303

Exciton localization and migration in individual CdSe quantum wires at low temperatures

J. J. Glennon
, R. Tang
, W. E. Buhro
, R. A. Loomis
, D. A. Bussian
, H. Htoon
, V. I. Klimov

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.

Original language	English
Article number	081303
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.80.081303
State	Published - Aug 11 2009

Access to Document

10.1103/PhysRevB.80.081303

Cite this

@article{270a840d4b1c41d3a5bf9dd1533ae4b4,

title = "Exciton localization and migration in individual CdSe quantum wires at low temperatures",

abstract = "Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.",

author = "Glennon, \{J. J.\} and R. Tang and Buhro, \{W. E.\} and Loomis, \{R. A.\} and Bussian, \{D. A.\} and H. Htoon and Klimov, \{V. I.\}",

year = "2009",

month = aug,

day = "11",

doi = "10.1103/PhysRevB.80.081303",

language = "English",

volume = "80",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

number = "8",

}

TY - JOUR

T1 - Exciton localization and migration in individual CdSe quantum wires at low temperatures

AU - Glennon, J. J.

AU - Tang, R.

AU - Buhro, W. E.

AU - Loomis, R. A.

AU - Bussian, D. A.

AU - Htoon, H.

AU - Klimov, V. I.

PY - 2009/8/11

Y1 - 2009/8/11

N2 - Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.

AB - Low-temperature (<40 K) photoluminescence (PL) spectra of individual CdSe nanocrystal quantum wires exhibit narrow (<5 meV) isolated peaks spanning a range ≤50 meV. We attribute these features to emission of excitons localized in shallow (a few meV deep) tight potential minima superimposed on longer-scale and larger-amplitude variations of the potential energy. Spectrally resolved PL dynamics reveal decreasing exciton-decay rates with decreasing emission energy. These observations are consistent with exciton relaxation within a manifold of localization sites characterized by an exponential density of states.

UR - https://www.scopus.com/pages/publications/70349442445

U2 - 10.1103/PhysRevB.80.081303

DO - 10.1103/PhysRevB.80.081303

M3 - Article

AN - SCOPUS:70349442445

SN - 1098-0121

VL - 80

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 081303

ER -

Exciton localization and migration in individual CdSe quantum wires at low temperatures

Abstract

Access to Document

Other files and links

Fingerprint

Cite this