High-temperature-dependent optical properties of ZnO film on sapphire substrate |
| |
Authors: | Chenghua Sui Naibo Chen Gaoyao Wei Hong Zhou |
| |
Affiliation: | a Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China b Department of Science, Zhijiang College of Zhejiang University of Technology, Hangzhou 310024, People's Republic of China |
| |
Abstract: | In order to fabricate fiber-optic temperature sensors based on ZnO film, it is important to study the temperature-dependent optical properties of this material. In this work, we deposited ZnO films on c-plane (0001) sapphire substrate at 250 °C. Atomic force microscope and X-ray diffraction measurements show the smooth surface and high orientation along [0001] of ZnO film, respectively. The high-temperature-dependent optical properties of ZnO film were measured by ultraviolet-visible transmission with temperatures ranging from room-temperature to 300 °C and analyzed by theoretically fitting the optical absorption edge curve. It is observed that the band gap energy red shifts nonlinearly from 3.345 to 3.153 eV with increasing temperature. The sharp absorption edge of ZnO films after annealing at 300 °C is almost consistent with that of the as-deposited sample, indicating an excellent thermal stability and the potential application in fiber-optic temperature sensors. |
| |
Keywords: | Zinc oxide Optical properties Annealing |
本文献已被 ScienceDirect 等数据库收录! |
|