| 학회 |
한국재료학회 |
| 학술대회 |
2008년 봄 (05/22 ~ 05/23, 상록리조트) |
| 권호 |
14권 1호 |
| 발표분야 |
반도체재료 |
| 제목 |
Chemical Bath Deposited CdS Thin Films and their Photoconductive Characteristics |
| 초록 |
Cadmium sulphide (CdS) has been extensively studied for photoconductor applications such as solar cells because it is one of the most sensitive photoconductors in the visible light regime. Although high-quality CdS can be produced by metalorganic chemical vapor deposition or molecular beam epitaxy, the fabrication cost increases significantly. Chemical bath deposition (CBD) is alternative approach to synthesize high-quality polycrystalline CdS thin films on large-scale wafers including flexible substrates at a low cost. In this study, polycrystalline CdS thin films were successfully deposited on various substrates such as glass and Si by CBD method. CdS thin films were prepared at low concentration of sulfur i.e. 1:0.125 concentration ratios of Cd and S. The thin films prepared by low concentrations of sulfur (S) source and at the grow temperature of 80 oC have shown low sheet resistance values due to the presence of more S vacancies. It was observed that not only the concentration ratio of Cd and S, but also the concentrations of NH3 and TEA placed an important role to determine the photoconductive characteristics of CdS films. We noticed that the dark sheet resistance and the photo sensitivity (dark/photo sheet resistance) of CdS films were increased with decreasing the ammonia volume. Research work is also proceeding with different compositions of CdxPb1-xS and CdSxSe1-x thin films. We will further discuss the growth mechanism and characteristics of CdS films and with various doping compositions of Pb and Se by CBD. |
| 저자 |
키란쿠마르, 윤순길, 이지홍, 김의태
|
| 소속 |
충남대 |
| 키워드 |
CdS; CBD; Photoconductive
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| E-Mail |
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