Undoped and La-doped ZnS thin films are prepared by chemical bath deposition(CBD)process through the co-precipitation reaction of inorganic precursors zinc sulfate,thiosulfate ammonia and La_(2)O_(3).Composition of th...Undoped and La-doped ZnS thin films are prepared by chemical bath deposition(CBD)process through the co-precipitation reaction of inorganic precursors zinc sulfate,thiosulfate ammonia and La_(2)O_(3).Composition of the 61ms is analyzed using an energy-dispersive x-ray spectroscopy(EDS).Absorption spectra and spectral tra.nsmitta.nces of the 61ms are measured using a double beam UV-VIS spectrophotometer(TU-1901).It is found that significant red shifts in absorption spectra and decrease in absorptivity are obtained with increasing lanthanum.Moreover,optical transmittance is increased as La is doped,with a transmittance of more than 80%for wavelength above 360 nm in La-doped ZnS thin 61ms.Compared to pure ZnS,the band gap decreases and flat-band potential positively shifts to quasi-metal for the La-doped ZnS.These results indicate that La-doped ZnS thin 6hns could be valuably adopted as transparent electrodes.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 61040061.
文摘Undoped and La-doped ZnS thin films are prepared by chemical bath deposition(CBD)process through the co-precipitation reaction of inorganic precursors zinc sulfate,thiosulfate ammonia and La_(2)O_(3).Composition of the 61ms is analyzed using an energy-dispersive x-ray spectroscopy(EDS).Absorption spectra and spectral tra.nsmitta.nces of the 61ms are measured using a double beam UV-VIS spectrophotometer(TU-1901).It is found that significant red shifts in absorption spectra and decrease in absorptivity are obtained with increasing lanthanum.Moreover,optical transmittance is increased as La is doped,with a transmittance of more than 80%for wavelength above 360 nm in La-doped ZnS thin 61ms.Compared to pure ZnS,the band gap decreases and flat-band potential positively shifts to quasi-metal for the La-doped ZnS.These results indicate that La-doped ZnS thin 6hns could be valuably adopted as transparent electrodes.
