Study on Photoconductivity in Air and Vacuum of ZnO Prepared by different materials

Saxena, Ravi Shankar

doi:10.22214/ijraset.2018.3562

Cited by 1 publication

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under UV light, Saxena et al demonstrated a higher photocurrent in vacuum than in air from ZnO microstructures. Similarly, their current decay time in dark was found to be higher in vacuum than in air [55]. Furthermore, Bao et al studied the photoconductivity of ZnO nanowires in vacuum by radiating the ZnO nanowire with three different power sources of UV radiation for 5 h, until saturation photocurrent was reached.…”

Section: Electrical and Optoelectrical Properties Of Zno Nanorodsmentioning

confidence: 99%

Relevance of alcoholic solvents in the growth of ZnO nanoparticles and ZnO hierarchical nanorod structures on their optical and opto-electrical properties

Nagpal,

Rauwel,

Ducroquet

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

We report on the synthesis of ZnO nanoparticles and ZnO hierarchical nanorod structures using four different alcohols i.e., methanol, isopropanol, ethanol, and aqueous ethanol (70% alcohol, 30% water). The syntheses of the nanoparticles were carried out by non-aqueous and hydrothermal routes. In general, absolute alcohol allows a better control of the synthesis reaction and nanoparticles as small as 5 nm were obtained, confirmed by TEM. XPS analysis elucidated the chemical states that were correlated to the synthesis reaction. For the nanorod growth, these four alcohols were used as seeding solvents, followed by hydrothermal ZnO nanorod growth. Here, the seed layer tailored the nanorod diameters and surface defects, which were studied by SEM and photoluminescence spectroscopy. Subsequently, The ZnO nanorods were electrically characterized and exhibited persistent photoconductivity under UV irradiation of 365nm. The differences in conductivity in dark and under UV irradiation were attributed to the size of the nanorods, defect states, semiconductor band bending and oxygen adsorption-desorption mechanisms. Parameters such as photoresponse and photosensitivity are also calculated in order to evaluate their applicability in UV sensors. This work demonstrates optimization of the physical, chemical, electrical and optical properties of both ZnO nanostructures via the use of alcoholic solvents.

show abstract

Section: Electrical and Optoelectrical Properties Of Zno Nanorodsmentioning

confidence: 99%