Deep ultraviolet hyperspectral cryomicroscopy in boron nitride: Photoluminescence in crystals with an ultra-low defect density

Pierre Valvin; Thomas Pelini; Guillaume Cassabois; Alberto Zobelli; Jiahan Li; James H. Edgar; Bernard Gil

doi:10.1063/5.0013121

journal article Open Access Jul 01, 2020

Deep ultraviolet hyperspectral cryomicroscopy in boron nitride: Photoluminescence in crystals with an ultra-low defect density

Pierre Valvin

AIP Advances Vol. 10 No. 7 · AIP Publishing

View at Publisher Save 10.1063/5.0013121

Abstract

We report the development of a scanning confocal microscope dedicated to photoluminescence in the 200 nm-wavelength range for samples at cryogenic temperatures (5 K–300 K). We demonstrate the performances of our deep ultraviolet cryomicroscope in high-quality hexagonal boron nitride (hBN) crystals, although it can be utilized for biological studies in its range of operating wavelengths. From the mapping of photoluminescence, we bring evidence for the suppression of extrinsic recombination channels in regions free from defects. The observation of emission spectra dominated by intrinsic recombination processes was never reported before in hBN by means of photoluminescence spectroscopy. We show that photoluminescence tomography now competes with cathodoluminescence and that deep ultraviolet cryomicroscopy by photoluminescence is a novel powerful tool in materials science applications, with the great advantage of an efficient non-invasive photo-excitation of carriers.

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Metrics

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Citations

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References

Details

Published: Jul 01, 2020
Vol/Issue: 10(7)
License: View

Authors

P

Pierre Valvin

Laboratoire Charles Coulomb, Université de Montpellier 1 , Case Courrier 074, 34095 Montpellier Cedex 5, France

T

Thomas Pelini

Laboratoire Charles Coulomb, Université de Montpellier 1 , Case Courrier 074, 34095 Montpellier Cedex 5, France; LNCMI-CNRS 2 , B.P. 166, 25, Rue des Martyrs, 38042 Grenoble, France

G

Guillaume Cassabois

Laboratoire Charles Coulomb, Université de Montpellier 1 , Case Courrier 074, 34095 Montpellier Cedex 5, France

A

Alberto Zobelli

Université Paris-Saclay, CNRS, Laboratoire de Physiques des Solides 3 , 91405 Orsay, France

J

Jiahan Li

Tim Taylor Department of Chemical Engineering, Kansas State University 4 , Manhattan, Kansas 66506, USA

J

James H. Edgar

Tim Taylor Department of Chemical Engineering, Kansas State University 4 , Manhattan, Kansas 66506, USA

B

Bernard Gil

Laboratoire Charles Coulomb, Université de Montpellier 1 , Case Courrier 074, 34095 Montpellier Cedex 5, France

Funding

National Science Foundation Award: CMMI 1538127

Agence Nationale de la Recherche Award: ANR-19-CE30-0007

Cite This Article

Pierre Valvin, Thomas Pelini, Guillaume Cassabois, et al. (2020). Deep ultraviolet hyperspectral cryomicroscopy in boron nitride: Photoluminescence in crystals with an ultra-low defect density. AIP Advances, 10(7). https://doi.org/10.1063/5.0013121

Deep ultraviolet hyperspectral cryomicroscopy in boron nitride: Photoluminescence in crystals with an ultra-low defect density

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