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Effect of substrate temperature on microstructure and optical properties of single-phased Ag2O film deposited by using radio-frequency reactive magnetron sputtering method
Ma Jiao-Min(马姣民), Liang Yan(梁艳), Gao Xiao-Yong(郜小勇), Zhang Zeng-Yuan(张增院), Chen Chao(陈超), Zhao Meng-Ke(赵孟珂), Yang Shi-E(杨仕娥), Gu Jin-Hua(谷锦华), Chen Yong-Sheng(陈永生), and Lu Jing-Xiao(卢景霄)
Chin. Phys. B, 2011, 20 (5):
056102.
DOI: 10.1088/1674-1056/20/5/056102
Using a radio-frequency reactive magnetron sputtering technique, a series of the single-phased Ag2O films are deposited in a mixture of oxygen and argon gas with a flow ratio of 2:3 by changing substrate temperature (Ts). Effects of the Ts on the microstructure and optical properties of the films are investigated by using X-ray diffractometry, scanning electron microscopy and spectrophotometry. The single-phased Ag2O films deposited at values of Ts below 200 ℃ are (111) preferentially oriented, which may be due to the smallest free energy of the (111) crystalline face. The film crystallization becomes poor as the value of Ts increases from 100 ℃ to 225 ℃. In particular, the Ag2O film deposited at Ts = 225 ℃ loses the (111) preferential orientation. Correspondingly, the film surface morphology obviously evolves from a uniform and compact surface structure to a loose and gullied surface structure. With the increase of Ts value, the transmissivity and the reflectivity of the films in the transparent region are gradually reduced, while the absorptivity gradually increases, which may be attributed to an evolution of the crystalline structure and the surface morphology of the films.
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