Luminescence properties of the solvothermally synthesized blue light emitting Mn doped Cu2O nanoparticles

Abstract

The Cu 2 O nanoparticles having average crystallite diameters ϳ8 -16 nm were synthesized by a simple solvothermal method. The Mn was doped in the Cu 2 O sample of crystallite size ϳ8 nm. The effects of the size and doping concentration on the crystal structures of the nanoparticles were investigated. The x-ray photoelectron spectroscopy studies clearly showed that the Mn was incorporated into the Cu 2 O lattice as Mn 2+ due to the substitution of the Cu + ions by Mn 2+ ions. The quantum confinement effects were observed in the nanoparticles. The multiple emissions from the Cu 2 O were quenched in the Mn doped nanoparticles and only blue light emitting Cu 2 O nanoparticles were obtained due to the transition 4 T 2 → 6 A 1 of Mn. The effects of the doping concentration and the particle size on the relaxations dynamics of the Cu 2 O nanoparticles were mainly investigated using photoluminescence decay.

Grain size tuning of nanostructured Cu2O films through vapour phase supersaturation control and their characterization for practical applications

“…These emissions are expected due to the excitonic transitions from the different sub levels of the conduction band (CB) to the Cu d-shells of the VB. 35 The transitions 3d → 4s from the top of VB to the bottom of CB are forbidden according to selection rules. Theoretically, it was predicted that transition probabilities from many bands below the top of VB to CB are negligible.…”

Copper/copper oxide nanoparticles synthesis usingStachys lavandulifoliaand its antibacterial activity

“…There have been various researches on the synthesis and applications of nanostructures of copper and copper oxides in various fields. Some of the important applications of these materials include fabrication of sensors and biosensors [20][21][22], optical and electronic devices [23], energy storage devices [24], and antibacterial materials [25]. Copper and its oxides are relatively non-toxic to mammals [26], low sensitivity for human tissue [27], and antimicrobial activity [25,28].…”

Enhanced Fröhlich interaction of semiconductor cuprous oxide films determined by temperature‐dependent Raman scattering and spectral transmittance

“…Cuprous oxide (Cu 2 O) is a p ‐type semiconductor with a direct band gap of 2.17 eV and also displays well‐defined series of excitonic features in the absorption and luminescence spectra with the large excitonic binding energy (150 meV) . Even though Cu 2 O is known for decades, the material has recently drawn renewed interest for the conversion of solar energy into electrical or chemical energy, showing a theoretical solar efficiency of about 9–11% .…”