| 초록 |
Under non-vacuum condition, CuInSe2 thin films were fabricated successfully using the chemical spray pyrolysis method as a function of Cu/In atomic ratios and variation of selenium ratios. X-ray diffraction, UV-visible spectroscopy, the Hall effect measurement and scanning electron microscopy were carried out for physical characterization. The variations of the Cu/In ratio and selenium contents were observed in the XRD, SEM, UV-visible spectrum and the Hall effect measurement analysis for fabricated thin films. The result of XRD and UV-visible analysis showed an increase or decrease of crystallinity and shift of transmittance tendency depending on the copper and selenium content. The particle size of thin films was increased with the increase of copper content. In the thin films, the change of Cu/In ratios between 0.8 to 1 showed an increase on hole density, but a decrease of Hall mobility and resistivity. For the reason of these phenomena, we suggest the formation of CuxSe phase particles or layers depends on the spray solution. With these results, we will fabricate and characterize CISe/CIGSe thin film solar cells in future work. |
