Thermally and optically induced effects on sub-band gap absorption in nanocrystalline CdSe (nc-CdSe) thin films

Optimization of different temperature annealed nanostructured CdSe thin film for photodetector applications

“…Therefore, a CdSe photo-sensing behaviour can possibly enhanced by changing its band gap by tuning different parameters such as, different nanostructures, doping element, growth level, post annealing, etc. Especially annealing could play an important role for enhancing the photoelectric performance because, temperature can change the nanostructure shapes (grain sizes) and reduce the grain boundaries [6].…”

Room temperature chemical bath deposition of cadmium selenide, cadmium sulfide and cadmium sulfoselenide thin films with novel nanostructures

“…It is well known that, often amorphous semiconductors exhibit wider optical band gap energy than their bulk counterparts due to lack of long range order. There is noticeable variation in the reported 'E g ' value of CdSe thin films that varies from 1.71 to 2.3 eV[8,[36][37][38].Figure 6(b) shows the Tauc plot of CdSSe thin film and 'E g ' value was equal to 2.15 eV. It is intermediate between the 'E g ' values of observed CdSe and CdS.…”

Comparison of CdS nano films deposited by thermal evaporation and spray pyrolysis techniques

“…The transmission spectra displayed a sharp absorption edge, indicating that CdS thin films could serve as effective optical filter materials. Notably, Figure (5) shows cased a distinct minimum in R at a wavelength falling within the 0.78-0.86 μm range, which corresponded to the maximum transmission for the films. It is observed that , interference fringes become less pronounced and eventually disappear as the thickness of the thin film increases beyond a certain limit.…”

“…Different techniques have been successfully employed to prepare CdS NPs and CdS thin films such as spray pyrolysis [4], thermal evaporation [5], chemical vapor deposition and electrodeposition [6]. The current work aims to investigate the structural and optical characteristics of CdS thin films deposited via spray pyrolysis and thermal evaporation.…”