Optical properties and structural correlations of GeAsSe chalcogenide glasses

Congji Zha; Rongping Wang; Anita Smith; Amrita Prasad; Ruth A. Jarvis; Barry Luther-Davies

doi:10.1007/s10854-007-9235-3

Optical properties and structural correlations of GeAsSe chalcogenide glasses

Congji Zha^*, Rongping Wang, Anita Smith, Amrita Prasad, Ruth A. Jarvis, Barry Luther-Davies

^*Corresponding author for this work

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

43 Citations (Scopus)

Abstract

Ge _xAs _ySe _100-x-y (33 ≤ x ≤ 39 and 12 ≤ y ≤ 16) glasses were prepared, and their structure and optical properties were studied by Raman and UV-Vis-IR spectroscopic techniques. Ge-tetrahedrons [GeSe ₄] dominated in the structural units, and 'defect' bonds, such as Ge-Ge, Ge-As and As-As bonds, also occurred in the glasses. A structural model for calculation of the optical band gap energy (E _g) of Ge-As-Se glasses was proposed, and the calculated values are consistent with experimental results. Increasing germanium and decreasing selenium content can reduce both the mean bond energies and optical band gap energies, enhancing the photo-sensitivity of the glasses.

Original language	English
Pages (from-to)	389-392
Number of pages	4
Journal	Journal of Materials Science: Materials in Electronics
Volume	18
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1007/s10854-007-9235-3
Publication status	Published - Oct 2007

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abstract = "Ge xAs ySe 100-x-y (33 ≤ x ≤ 39 and 12 ≤ y ≤ 16) glasses were prepared, and their structure and optical properties were studied by Raman and UV-Vis-IR spectroscopic techniques. Ge-tetrahedrons [GeSe 4] dominated in the structural units, and 'defect' bonds, such as Ge-Ge, Ge-As and As-As bonds, also occurred in the glasses. A structural model for calculation of the optical band gap energy (E g) of Ge-As-Se glasses was proposed, and the calculated values are consistent with experimental results. Increasing germanium and decreasing selenium content can reduce both the mean bond energies and optical band gap energies, enhancing the photo-sensitivity of the glasses.",

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AU - Zha, Congji

AU - Wang, Rongping

AU - Smith, Anita

AU - Prasad, Amrita

AU - Jarvis, Ruth A.

AU - Luther-Davies, Barry

PY - 2007/10

Y1 - 2007/10

N2 - Ge xAs ySe 100-x-y (33 ≤ x ≤ 39 and 12 ≤ y ≤ 16) glasses were prepared, and their structure and optical properties were studied by Raman and UV-Vis-IR spectroscopic techniques. Ge-tetrahedrons [GeSe 4] dominated in the structural units, and 'defect' bonds, such as Ge-Ge, Ge-As and As-As bonds, also occurred in the glasses. A structural model for calculation of the optical band gap energy (E g) of Ge-As-Se glasses was proposed, and the calculated values are consistent with experimental results. Increasing germanium and decreasing selenium content can reduce both the mean bond energies and optical band gap energies, enhancing the photo-sensitivity of the glasses.

AB - Ge xAs ySe 100-x-y (33 ≤ x ≤ 39 and 12 ≤ y ≤ 16) glasses were prepared, and their structure and optical properties were studied by Raman and UV-Vis-IR spectroscopic techniques. Ge-tetrahedrons [GeSe 4] dominated in the structural units, and 'defect' bonds, such as Ge-Ge, Ge-As and As-As bonds, also occurred in the glasses. A structural model for calculation of the optical band gap energy (E g) of Ge-As-Se glasses was proposed, and the calculated values are consistent with experimental results. Increasing germanium and decreasing selenium content can reduce both the mean bond energies and optical band gap energies, enhancing the photo-sensitivity of the glasses.

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EP - 392

JO - Journal of Materials Science: Materials in Electronics

JF - Journal of Materials Science: Materials in Electronics

IS - SUPPL. 1

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Optical properties and structural correlations of GeAsSe chalcogenide glasses

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