Anomalous photoconductivity in chemical spray pyrolysis deposited nano-crystalline ZnO thin films

Characterization and Growth of TiO2/ZnO on PTFE Substrates at Different Volumetric Ratios Using Chemical Bath Deposition

“…For each photodetector device, the I L was comparatively greater than the I d at the forward bias voltage, incrementally in an exponential frame per device, while they were arising out in curves contrastingly at the backward bias voltage range. In these cases, the logical interpretation of the I d charge carrier mechanisms was related to the captured free electrons by the adsorbed oxygen molecules linked with the nanocomposites [88]; whereas the I L leads to the generation of photo-excited electron-hole pairs, the migrated holes combine with oxygen anions, resulting in the desorption of oxygen molecules from the surface [89]. This process results in an increment in the free carrier charges.…”

Electrical and Optical Properties of ZnO:Al/p-Si Heterojunction Diodes

“…Several methods were adopted to synthesize undoped and doped ZnO thin films. Among reported methods, one finds laser deposition [14,15], sputtering [16], molecular beam epitaxy (MBE) [17], evaporation [18], chemical vapor deposition (CVD) [19], electrochemical deposition [20], doctor blade technique [21], chemical bath deposition (CBD) [22,23], chemical wet and dry (CWD) method [24], successive ionic layer adsorption and reaction (SILAR) method [25], spray pyrolysis [26][27][28][29], and sol-gel process including spin and dip-coating processes [30][31][32][33]. Due to its cheap manufacturing costs, effectiveness, simplicity, simple control of doping, broad area homogeneity, and crystalline consistency during the production of devices, the sol-gel dip-coating process is suited for thin film deposition [34,35].…”

Sm2O3 and Sm2O3-based nanostructures for photocatalysis, sensors, CO conversion, and biological applications

“…Semiconductor NPs have wide band gaps in which studies showed significant modification in their properties with band gap tuning. 4 Metal oxide NPs have been produced by synthesis methods such as sol–gel, 5–8 pyrolysis, 9–11 hydrolysis, 12–14 and gas-phase condensation techniques. 15…”

“…Semiconductor NPs have wide band gaps in which studies showed significant modification in their properties with band gap tuning. 4 Metal oxide NPs have been produced by synthesis methods such as sol-gel, [5][6][7][8] pyrolysis, [9][10][11] hydrolysis, [12][13][14] and gas-phase condensation techniques. 15 Amongst metal oxides, rare earth oxides (RE 2 O 3 ) have attracted considerable attention due to their optical, electronic, and chemical properties resulting from their 4f electrons, and rare earth oxides have been widely used in the fields of luminescence devices, optical transmission, biochemical probes, medical diagnostics, and so forth.…”