Zinc selenide (ZnSe) film is successfully deposited by the electrodeposition technology. Due to ZnSe with a direct band-gap of 2.7 eV, it is widely used for optoelectronic applications. Recently, it is used as the window layer to improve the open circuit voltage in solar cells. The ZnSe film was prepared with vacuum, high temperature, and high pressure was usually used. However, these disadvantages limited the cost down and time to market. Electrodeposition is an easy use and very simple technology proposed to grow large area of ZnSe films. In this study, the electrodeposition of ZnSe film has been accomplished in an aqueous bath (pH = 2) during electrochemical reduction of an electrolyte containing SeO2 (100 mM) and ZnSO4¡E7H2O (1 M) on a indium tin oxide glass substrate.
Results clearly show that the film quality was strongly depend on the electrodeposited potential. The electro-potential is Indeed as a function of the substrate temperature, the concentration of solutes, and pH value of solution. The structure of as-deposited ZnSe thin film is polycrystalline measured by x-ray diffraction (XRD). The surface morphology of deposited films are investigated by Scanning electron microscopy (SEM). The high quality of film growth is achieved when the electro-potential applied is close to the electrodeposited potential of ZnSe. As the more negative of electrodeposited potential applied at room temperature, the growth rate, thickness and resistance of thin film are increase and the current is decrease. In addition, the i-t curve shows very rough due to the bubbles generated to disturb the solution while electrodeposited at the high temperature.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0730107-210800 |
| Date | 30 July 2007 |
| Creators | Lin, Yuan-de |
| Contributors | Herng-Yih Ueng, Yuh-fung Huang, Chih-Hsiung Liao |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0730107-210800 |
| Rights | not_available, Copyright information available at source archive |
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