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

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

16 Citations (Scopus)

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
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
Publication status	Published - 2015
Externally published	Yes

Keywords

Excitons
Cuprous oxide
Cu2O
Vacancies
Stress
Hyperspectral imaging

Access to Document

10.1016/j.jlumin.2014.11.035

Cite this

@article{ce5e3e3045d54c0698dad1faa2ecd04f,

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 = "Excitons, Cuprous oxide, Cu2O, Vacancies, Stress, Hyperspectral imaging",

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",

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

language = "English",

volume = "159",

pages = "294--302",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier BV",

}

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

Y1 - 2015

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 - Excitons

KW - Cuprous oxide

KW - Cu2O

KW - Vacancies

KW - Stress

KW - Hyperspectral imaging

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

U2 - 10.1016/j.jlumin.2014.11.035

DO - 10.1016/j.jlumin.2014.11.035

M3 - Article

SN - 0022-2313

VL - 159

SP - 294

EP - 302

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Evaluation of defects in cuprous oxide through exciton luminescence imaging

Abstract

Keywords

Access to Document

Other files and links

Cite this