Defect and strain modulated highly efficient ZnO UV detector: Temperature and low-pressure dependent studies

Large Photomultiplication by Charge-Self-Trapping for High-Response Quantum Dot Infrared Photodetectors

“…Density functional theory calculation indicates that the energy level of defects is located inside the band gap close to the conduction band, as illustrated in Figure c . The V O 2+ defects can trap electrons in external charge injecting …”

“…30 The V O 2+ defects can trap electrons in external charge injecting. 31 Charge distribution in an Ac − anion adsorbed on the ZnO NPs is simulated by Gaussian, 32 and the red and yellow colors in Figure 4d represent negative and positive charges, respectively. A more negative charge is concentrated on the carboxyl group in Ac − anion.…”

A synergetic enhancement strategy of light utilization and carrier transfer for UV photodetection associated with artificial resonance nano-cavities

“…[6][7][8][9][10][11][12] Among those semiconductors, ZnO has been regarded as a competitive nominee for the implementation of UV photodetection owing to its excellent advantages, i.e., a wide direct bandgap (∼3.37 eV), high exciton binding energy (∼60 meV), small electron and hole collision ionization coefficient, non-toxic nature, etc. [13][14][15][16] To meet the requirements for photodetection technique innovations, liquidphase deposition for low-dimensional ZnO, especially for colloidal quantum dots (CQDs), has been developed for concurrently realizing energy-efficient manufacture, lattice matching, and an adjustable bandgap during the fabrication of photoactive layers. [17][18][19] However, the inherently irreconcilable contradiction of the inverse relationship between light absorption and carrier transportation is critically determined by the thickness of photoactive layers, which has still remained a big concern for a facile strategy.…”

Highly efficient and Reusable ZnO microflower photocatalyst on stainless steel mesh under UV–Vis and natural sunlight

“…Although TiO 2 shows efficient photocatalytic activity and has been tremendously studied for application in degradation of dyes, it has recently been reported that, in comparison, ZnO has higher degradation ability for organic contaminants due to its higher absorbance of light and used in larger spectrum region even in visible region for photocatalytic activity [15,16]. ZnO, a wideband semiconductor having bandgap of 3.37eV, has many applications like solar cells, gas sensors, field emission, piezoelectric generator, UV photodiode [17][18][19][20][21][22][23][24]. ZnO, as thin film or nanopowder, is used to deposit or synthesize in various methods like sputtering, atomic layer deposition, pulse layer deposition, MOCVD, SILAR method, electrodeposition, spray pyrolysis, thermal evaporation, sol-gel, and chemical precipitation [25][26][27][28][29][30][31].…”