Fabrication of UV photo-detector based on coral reef like p-NiO/n-ZnO nanocomposite structures

Analysis of junction properties of gold–zinc oxide nanorods-based Schottky diode by means of frequency dependent electrical characterization on textile

“…ZnO nanostructures have been used for the fabrication of optical, electrical, and piezoelectric devices e.g. light emitting diodes [11], solar cells [18], laser diodes [19], and UV photo detectors [20] etc., a recent comprehensive review of variety of issues related to Schottky contacts on ZnO thin film has been published [21].…”

UV photo-detector based on p-NiO thin film/n-ZnO nanorods heterojunction prepared by a simple process

“…A potentiostat was used to check the decay time response of the diode. The UV illumination was applied for 13 s and the gap between the UV illuminations to bring the diode at stable position was about 40 s as shown in Figure 7 ] where a depletion layer will be formed near the interface of the p-NiO/n-ZnO heterojunction [13,[31][32][33][34].…”

“…Then this will be followed by holes migration to the surface of the ZnO nanorods along the potential gradient, produced by band bending, discharging the negatively charged adsorbed oxygen ions [O2 -+ h + → O2 (g)]. Then, oxygen is desorbed from the surface, resulting in an increase in the free carrier concentration and a decrease in the width of the depletion layer [13,[31][32][33]. This leads to an increase in the carrier injection, producing a persistent photocurrent.…”

“…So far ZnO based UV photo-detectors with high performance have been reported using different methods such as molecular beam epitaxy [9] and sol-gel [10]. Recently, it has been reported that hybrid structures of ZnO with other semiconductors could increase the performance of UV detectors [11][12][13][14]. On the other hand, nickel oxide (NiO) has been under investigation for different technological applications due to its wide direct band gap (3.6 -4.0 eV) and it is intrinsically p type semiconductor.…”

Optimization and characterization of NiO thin film and the influence of thickness on the electrical properties of n-ZnO nanorods/p-NiO heterojunction

“…Specially one dimensional ZnO nanostructures are well known for a variety of attractive properties and have been used successfully in different optoelectronic devices and UV photo detectors [3,4].…”