Photoresponse of polycrystalline ZnO films deposited by r.f. bias sputtering

Structural, optical and photoconductivity characteristics of manganese doped cadmium sulfide nanoparticles synthesized by co-precipitation method

“…With time dark current decreases and eventually it gets stabilized. This decrease in dark-conductivity is ascribed to dominance of the process of chemisorptions of oxygen after initial dominance of the process of field-assisted desorption of oxygen [59,60]. The stabilized dark-current in CdS:Mn (1 mol%) and CdS:Mn (3 mol%) NPs are higher than dark-current found in un-doped CdS NPs.…”

“…On the contrary free charge carriers increases due to desorption of O 2 . In un-doped CdS as well as Mn-doped CdS NPs, dark current is initially high, which may be attributed to field induced desorption of oxygen molecules because the electric field appears to assist the process of desorption of oxygen [59,60]. With time dark current decreases and eventually it gets stabilized.…”

The effect of indium doping on structural, electrical conductivity, photoconductivity and density of states properties of ZnO films

“…As the light is off, the decay mechanism is observed. The decrease in conductance is due to rapid recombination of excess carriers followed by the slow emptying of filled traps [41]. These results suggest that slow photoconductive decay is somewhat independent of crystalline quality.…”

The wide band gap of highly oriented nanocrystalline Al doped ZnO thin films from sol–gel dip coating

“…These interesting properties of ZnO thin films have been for use in many applications such as room temperature UV lasers and short-wavelength optoelectronic device [1,2]. Furthermore, ZnO can be used in photoconductors [3], gas sensors [4] and solar cell applications [5]. The highly preferential orientation along c-axis and wide band-gap energy of films is useful characteristics in optical wave-guides, surface acoustic wave and acoustic-optic device [6].…”