研究目的
Investigating the preparation and characterization of copper-doped Cd0.7Zn0.3S thin films and evaluating the doping effect of copper on the optical and structural properties of the films.
研究成果
Cu:Cd0.7Zn0.3S thin films were formed on glass substrate by chemical bath deposition technique. XRD results indicated that Cd0.7Zn0.3S:Cu thin films are in the polycrystalline form with a hexagonal structure. The energy band gap of the Cu:Cd0.7Zn0.3S samples obtained using optical absorption spectra varied from 4.650 to 3.265 eV. SEM studies revealed that the film was a fine sphere cluster of grain. The presence of elemental constituents has been confirmed by EDAX.
研究不足
The study is limited to the characterization of copper-doped Cd0.7Zn0.3S thin films prepared by chemical bath deposition method. The effects of other doping elements or preparation methods are not explored.
1：Experimental Design and Method Selection:
The doping of copper on Cd
2：7Zn3S was done by chemically deposited method. The glass slides were cleaned and then dipped into a chromic acid bath, further washed with distilled water and acetone then dried. A Cu:
Cd0.7Zn0.3S bath containing 0.1 M of copper nitrate, 0.1 M of cadmium chloride, 0.1 zinc chloride of and 1 M of thiourea. The pH was adjusted to 10 by adding NH4OH. The glass substrates were immersed vertically in the reaction vessel and the bath was set to a desired temperature as 80 °C for 120 min and the slides were in the bath for 24 h at room temperature. The deposited films were washed with distilled water then dried in air.
3：7Zn3S bath containing 1 M of copper nitrate, 1 M of cadmium chloride, 1 zinc chloride of and 1 M of thiourea. The pH was adjusted to 10 by adding NH4OH. The glass substrates were immersed vertically in the reaction vessel and the bath was set to a desired temperature as 80 °C for 120 min and the slides were in the bath for 24 h at room temperature. The deposited films were washed with distilled water then dried in air.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: The films were characterized using XRD technique using a Philips PW1840 instrument with a CuKα target. An UV-visible spectrometer (Jenway 6800) has been utilized to measure the absorbance and transmittance of films in the wavelength (λ). SEM studies revealed the size of the sphere and EDAX confirmed the presence of elemental constituents.
4：List of Experimental Equipment and Materials:
Philips PW1840 instrument, UV-visible spectrometer (Jenway 6800), scanning electron microscope, energy dispersive spectroscopy.
5：Experimental Procedures and Operational Workflow:
The films were prepared by chemical bath deposition method, characterized by XRD, SEM, EDAX, and UV-visible spectroscopy.
6：Data Analysis Methods:
The optical absorption coefficient (α) near the absorption edge is evolved from the equation: α(ν) =
7：303A/d. The band energy gap are determined from the equation:
hν = A (hν-Eg)n.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
