TY - JOUR
T1 - Optical properties and structural correlations of GeAsSe chalcogenide glasses
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.
UR - http://www.scopus.com/inward/record.url?scp=34547566678&partnerID=8YFLogxK
U2 - 10.1007/s10854-007-9235-3
DO - 10.1007/s10854-007-9235-3
M3 - Article
SN - 0957-4522
VL - 18
SP - 389
EP - 392
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - SUPPL. 1
ER -