Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 83, Issue 6, Pages 1356-1360Publisher
AMER CERAMIC SOC
DOI: 10.1111/j.1151-2916.2000.tb01393.x
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Germanium oxide glass thin films were prepared by the sol-gel method and annealed under reduced atmosphere to create more oxygen-deficient defects. The densification and crystallization were examined depending on sintering and annealing conditions. Thus, homogeneous germanium oxide thin films with a high content of oxygen vacancies were fabricated. Ultraviolet absorption and oxygen vacancies of the films were investigated as a function of annealing temperature and time. Optical absorption in the 5-eV region due to the formation of oxygen vacancies is enhanced with increasing annealing temperature and time. The formation energy of oxygen vacancies is calculated to be about 1.0 eV.
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