Evaluation of defects in cuprous oxide through exciton luminescence imaging

Laszlo Frazer; Erik J. Lenferink; Kelvin B. Chang; Kenneth R. Poeppelmeier; Nathaniel P. Stern; John B. Ketterson

doi:10.1016/j.jlumin.2014.11.035

Evaluation of defects in cuprous oxide through exciton luminescence imaging

Laszlo Frazer^*, Erik J. Lenferink, Kelvin B. Chang, Kenneth R. Poeppelmeier, Nathaniel P. Stern, John B. Ketterson

^*Corresponding author for this work

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

10 Scopus citations

Abstract

The various decay mechanisms of excitons in cuprous oxide (Cu₂O) are highly sensitive to defects which can relax selection rules. Here we report cryogenic hyperspectral imaging of exciton luminescence from cuprous oxide crystals grown via the floating zone method showing that the samples have few defects. Some locations, however, show strain splitting of the 1s orthoexciton triplet polariton luminescence. Strain is reduced by annealing. In addition, annealing causes annihilation of oxygen and copper vacancies, which leads to a negative correlation between luminescence of unlike vacancies.

Original language	English (US)
Pages (from-to)	294-302
Number of pages	9
Journal	Journal of Luminescence
Volume	159
DOIs	https://doi.org/10.1016/j.jlumin.2014.11.035
State	Published - Mar 2015

Keywords

CuO
Cuprous oxide
Excitons
Hyperspectral imaging
Stress
Vacancies

ASJC Scopus subject areas

Biophysics
Biochemistry
Chemistry(all)
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.jlumin.2014.11.035

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@article{c318f4fa587441728402a67f31905789,

title = "Evaluation of defects in cuprous oxide through exciton luminescence imaging",

abstract = "The various decay mechanisms of excitons in cuprous oxide (Cu2O) are highly sensitive to defects which can relax selection rules. Here we report cryogenic hyperspectral imaging of exciton luminescence from cuprous oxide crystals grown via the floating zone method showing that the samples have few defects. Some locations, however, show strain splitting of the 1s orthoexciton triplet polariton luminescence. Strain is reduced by annealing. In addition, annealing causes annihilation of oxygen and copper vacancies, which leads to a negative correlation between luminescence of unlike vacancies.",

keywords = "CuO, Cuprous oxide, Excitons, Hyperspectral imaging, Stress, Vacancies",

author = "Laszlo Frazer and Lenferink, {Erik J.} and Chang, {Kelvin B.} and Poeppelmeier, {Kenneth R.} and Stern, {Nathaniel P.} and Ketterson, {John B.}",

year = "2015",

month = mar,

doi = "10.1016/j.jlumin.2014.11.035",

language = "English (US)",

volume = "159",

pages = "294--302",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier",

}

TY - JOUR

T1 - Evaluation of defects in cuprous oxide through exciton luminescence imaging

AU - Frazer, Laszlo

AU - Lenferink, Erik J.

AU - Chang, Kelvin B.

AU - Poeppelmeier, Kenneth R.

AU - Stern, Nathaniel P.

AU - Ketterson, John B.

PY - 2015/3

Y1 - 2015/3

N2 - The various decay mechanisms of excitons in cuprous oxide (Cu2O) are highly sensitive to defects which can relax selection rules. Here we report cryogenic hyperspectral imaging of exciton luminescence from cuprous oxide crystals grown via the floating zone method showing that the samples have few defects. Some locations, however, show strain splitting of the 1s orthoexciton triplet polariton luminescence. Strain is reduced by annealing. In addition, annealing causes annihilation of oxygen and copper vacancies, which leads to a negative correlation between luminescence of unlike vacancies.

AB - The various decay mechanisms of excitons in cuprous oxide (Cu2O) are highly sensitive to defects which can relax selection rules. Here we report cryogenic hyperspectral imaging of exciton luminescence from cuprous oxide crystals grown via the floating zone method showing that the samples have few defects. Some locations, however, show strain splitting of the 1s orthoexciton triplet polariton luminescence. Strain is reduced by annealing. In addition, annealing causes annihilation of oxygen and copper vacancies, which leads to a negative correlation between luminescence of unlike vacancies.

KW - CuO

KW - Cuprous oxide

KW - Excitons

KW - Hyperspectral imaging

KW - Stress

KW - Vacancies

UR - http://www.scopus.com/inward/record.url?scp=84916641105&partnerID=8YFLogxK

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U2 - 10.1016/j.jlumin.2014.11.035

DO - 10.1016/j.jlumin.2014.11.035

M3 - Article

AN - SCOPUS:84916641105

VL - 159

SP - 294

EP - 302

JO - Journal of Luminescence

JF - Journal of Luminescence

SN - 0022-2313

ER -

Evaluation of defects in cuprous oxide through exciton luminescence imaging

Abstract

Keywords

ASJC Scopus subject areas

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