HIGHER PHOTO SENSITIVITY OF Co-Y-OXIDE NANO STRUCTURESYNTHESIZED BY HYDROTHERMAL METHOD

[摘要] In this work, Co-Y-oxide Nano Structure is successfully synthesized via hydrothermalmethod. The XRD analysis, SEM analysis, optical, electrical and photo sensing propertieshave been investigated for Co3O4 and Co-Y-oxide thin films. The X-ray diffraction (XRD)analysis reveals that all films are polycrystalline in nature, having cubic structure. TheSEM images of thin films clearly indicates that Co3O4 possesses nanosphere like structureand flower like for Co-Y-oxide. The optical properties show that the optical energy gapfollows allowed direct electronic transition calculated using Tauc equation and it increasesfor Co-Y-oxide. The photo sensing properties of thin films are investigated as a functionof time at different wavelengths to find the sensitivity for these lights. For Co3O4, photosensitivities are 39.7% and 40% at wavelengths 470nm and 600nm respectively, while forCo-Y-oxide, photo sensitivities are 84% and 111% for these wavelengths. So, highersensitivity is obtained for Co-Y-oxide with fast rise and fall times less than 1s.

[学科分类] 生物技术

[关键词] Cobalt Oxide;Yttrium;Photo Sensor;Sensitivity;Hydrothermal.