Influence of Deposition Time on the Microstructure and Transport Properties of CdO Thin Films Prepared by Chemical Bath Deposition

• 作者: A. Gowri Manohari Adaikalam Kathalingam Jin-Koo Rhee Narayanan Soundaram P. Perumal Rathinam Chandramohan Santiyagu Valanarasu
• 来源期刊: 表面工程材料与先进技术期刊(英文)
• 学科: 医学
• 关键词: Cadmium Oxide Chemical BATH DEPOSITION TRANSPARENT ELECTRODE
• 年，卷（期）: 2012,（2）
• 页码范围: 71-75
• 页数: 5页
• 分类号: R73

摘要

Transparent thin films of CdO has been deposited on to glass substrates employing chemical bath deposition. The prepared films are reproducible, adherent to the substrate, pinhole free and uniform. Amongst the different process parameters, the deposition time plays a significant role in obtaining device quality transparent CdO thin films. X-ray powder diffraction (XRD) studies indicated that the thin films are polycrystalline in nature with cubic phase with a cell constant of a = 4.638 ?. The surface morphology of the prepared CdO thin films was examined by scanning electron microscopy. The films deposited at 24 hrs exhibited highest optical transmittivity (>80%) and the direct band gap energy was found to vary from 2.50 to 2.91 eV with a rise deposition time from 6 to 30 hrs. The electrical resitivity variations of these films were measured in the temperature range between 30?C and 150?C by four-probe technique.