Peak profile analysis, electrical, dielectric behaviour and defect mediated yellow photoluminescence of zinc oxide nanostructures

Abstract

A simple chemical method has been used to synthesize pure and crystalline ZnO nanoparticles. XRD study revealed hexagonal unit-cell with crystallite size 18.32 nm. Non-Debye type relaxation mechanism leads to an additional constant-phase-contribution to the equivalent parallel RC-network. The grain-boundary effect to the conductivity is very large. The dc conductivity was calculated to be 4.9×10-8 (Ω-cm)-1. The high loss-tangent at lower frequency is contributed by the large grain boundary effect of the material. The material is highly transparent in the visible window of wavelength with wide and direct band gap of 3.53 eV. The highly intense photoluminescence at 583 nm is attributed to oxygen related defect (interstitials or vacancy) .

High-performance photodetector based on semi-encompassed CH3NH3PbCl3–ZnO microwire heterojunction with alterable spectral response

“…Over recent years, organic-inorganic hybrid perovskite materials, CH 3 NH 3 PbX 3 (X = Cl − , Br − and I − ), have grown to be a hit topics in the field of optoelectronic facilities, such as light-emitting diodes, solar cells, lasers and photodetectors [1][2][3][4][5][6][7][8][9][10][11][12]. In particular, owing to their exceptional optoelectronic characteristics (such as adjustable direct band gap, excellent bipolar charge transport performance, and high light absorption coefficient), CH 3 NH 3 PbX 3 -based photodetectors have attracted increasing attention, and the devices with various structures have been demonstrated, including metal-semiconductor-metal (MSM), heterojunction and schottky structures [13][14][15][16][17].…”