Effects of pH Value on the Structures and Optical Properties of Bi2S3 Thin Films

摘要：

　　Bismuth sulfide (Bi2S3) is an important semiconductor material,which has wide applications in thermoelectricity,electronics,photoelectricity and infrared spectroscopy.Bi2S3 thin films have been deposited on ITO substrates through a cathodic electrodeposition approach at room temperature.The as-deposited thin films were characterized by X-ray diffraction (XRD),atomic force microscopy (AFM) and photoluminescence spectrum (PL).The effects of solution pH values on the structures and optical properties of the thin films were particularly investigated.Results show that uniform Bi2S3 thin films with oriented growth along (240) direction can be obtained at the solution pH value range from 4.5 to 6.5.The as-prepared thin films exhibit stable blue-green photoluminescence properties under the ultraviolet light excitation at room temperature.With the increase of the solution pH values,the crystallization of the Bi2S3 thin films improves while the grain size of the obtained thin films decreases and the light emission intensity of the thin films decreases.

关键词： Bi2S3 Thin films Electrodeposition Optical properties

作者: Huang Jian-Feng Wang Yan Cao Li-Yun Zhu Hui Zeng Xie-Rong

作者单位: Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education,Shaa Shenzhen Key Laboratories of Special Functional Materials, Shenzhen 518086, China

会议类型: 国际会议

会议名称: The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))

会议地点: 哈尔滨

会议语种:英文

页码: 397-399

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）