Removal of copper vacancies in cuprous oxide single crystals grown by the floating zone method

Kelvin B. Chang; Laszlo Frazer; Johanna J. Schwartz; John B. Ketterson; Kenneth R. Poeppelmeier

doi:10.1021/cg401081m

Removal of copper vacancies in cuprous oxide single crystals grown by the floating zone method

Kelvin B. Chang, Laszlo Frazer, Johanna J. Schwartz, John B. Ketterson, Kenneth R. Poeppelmeier^*

^*Corresponding author for this work

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

19 Scopus citations

Abstract

Single crystals of cuprous oxide (Cu₂O) with minimal defects were grown using the optical floating zone technique. Copper vacancies were removed through the promotion of CuO precipitation within the bulk Cu ₂O crystal following the reaction Cu_Cu^Cu2O + V_Cu^Cu2O + O_O^Cu2O → Cu _Cu^CuO + O_O^CuO. This reaction was promoted through the use of high purity samples and by growing crystals under an oxidizing atmosphere. Although an increase in the oxygen concentration of the atmosphere will initially increase the oxygen to copper ratio, the excess oxygen in the final Cu₂O crystal is ultimately decreased through the formation of CuO as the crystal cools. Copper vacancies were reduced further, and the CuO phase was eventually removed from the Cu₂O crystal when thin slices of the crystal were annealed.

Original language	English (US)
Pages (from-to)	4914-4922
Number of pages	9
Journal	Crystal Growth and Design
Volume	13
Issue number	11
DOIs	https://doi.org/10.1021/cg401081m
State	Published - Nov 6 2013

Funding

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1021/cg401081m

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title = "Removal of copper vacancies in cuprous oxide single crystals grown by the floating zone method",

abstract = "Single crystals of cuprous oxide (Cu2O) with minimal defects were grown using the optical floating zone technique. Copper vacancies were removed through the promotion of CuO precipitation within the bulk Cu 2O crystal following the reaction CuCuCu2O + VCuCu2O + OOCu2O → Cu CuCuO + OOCuO. This reaction was promoted through the use of high purity samples and by growing crystals under an oxidizing atmosphere. Although an increase in the oxygen concentration of the atmosphere will initially increase the oxygen to copper ratio, the excess oxygen in the final Cu2O crystal is ultimately decreased through the formation of CuO as the crystal cools. Copper vacancies were reduced further, and the CuO phase was eventually removed from the Cu2O crystal when thin slices of the crystal were annealed.",

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doi = "10.1021/cg401081m",

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T1 - Removal of copper vacancies in cuprous oxide single crystals grown by the floating zone method

AU - Chang, Kelvin B.

AU - Frazer, Laszlo

AU - Schwartz, Johanna J.

AU - Ketterson, John B.

AU - Poeppelmeier, Kenneth R.

PY - 2013/11/6

Y1 - 2013/11/6

N2 - Single crystals of cuprous oxide (Cu2O) with minimal defects were grown using the optical floating zone technique. Copper vacancies were removed through the promotion of CuO precipitation within the bulk Cu 2O crystal following the reaction CuCuCu2O + VCuCu2O + OOCu2O → Cu CuCuO + OOCuO. This reaction was promoted through the use of high purity samples and by growing crystals under an oxidizing atmosphere. Although an increase in the oxygen concentration of the atmosphere will initially increase the oxygen to copper ratio, the excess oxygen in the final Cu2O crystal is ultimately decreased through the formation of CuO as the crystal cools. Copper vacancies were reduced further, and the CuO phase was eventually removed from the Cu2O crystal when thin slices of the crystal were annealed.

AB - Single crystals of cuprous oxide (Cu2O) with minimal defects were grown using the optical floating zone technique. Copper vacancies were removed through the promotion of CuO precipitation within the bulk Cu 2O crystal following the reaction CuCuCu2O + VCuCu2O + OOCu2O → Cu CuCuO + OOCuO. This reaction was promoted through the use of high purity samples and by growing crystals under an oxidizing atmosphere. Although an increase in the oxygen concentration of the atmosphere will initially increase the oxygen to copper ratio, the excess oxygen in the final Cu2O crystal is ultimately decreased through the formation of CuO as the crystal cools. Copper vacancies were reduced further, and the CuO phase was eventually removed from the Cu2O crystal when thin slices of the crystal were annealed.

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Removal of copper vacancies in cuprous oxide single crystals grown by the floating zone method

Abstract

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