Synthesis and photoluminescence properties of ZnMnS nanobelts

Abstract

Mn-doped ZnS nanobelts have been prepared through a thermal evaporation method starting with a mixture of acetylacetonates and H2S at 900 °C. The nanobelts had a uniform single-crystal hexagonal wurtzite structure and grew along [001] direction. Undoped ZnS nanobelts and ZnMnS nanobelts with 1%, 3%, and 5% Mn so obtained have been characterized by x-ray diffraction, energy dispersive x-ray analysis, and photoluminescence (PL) spectra. PL measurements showed that the fluorescence efficiencies increased and the glow peaks shifted to longer wavelengths as the Mn-doped ratios increased, and the doping was found responsible for the changes in the defect-related emission of the ZnS nanobelts.

Structural, optical and photoluminescence properties of ZnS: Cu nanoparticle thin films as a function of dopant concentration and quantum confinement effect

“…Doping of ZnS nanoparticles by transition metal ions e.g. Mn 2+ [2,3], Cu 2+ [4,5] and rare earth ions e.g. Eu 2+ [6,7] have been successfully done by techniques such as thermal evaporation, sol-gel processing, co-precipitation, microemulsions, etc.…”

Halide‐Transport Chemical Vapor Deposition of Luminescent ZnS:Mn2+ One‐Dimensional Nanostructures

“…However, the SA PL intensity decreases as the Mn-doped ratio is increased, because more electrons excited by the energy absorbed by ZnS are transferred to the dopant, Mn 2+ , which causes the orange emission. A similar series of PL spectra have been reported recently, [39] where ZnMnS nanobelts were prepared under H 2 S flow with Zn(acac) 2 and Mn(acac) 2 as starting materials. Our results match the literature reports well and a more general synthetic route is presented in this article.…”

Nanoparticles and Fluorescence

“…A light-emitting transition metal ion (Mn 2+ ) was doped in a ZnS QD (3.5-7.5 nm) for the first time by Bhargava et al [85] who obtained 18 % quantum efficiency. Doping of ZnS nanoparticles by transition metal ions, e.g., Mn 2+ [86][87][88] and Cu 2+ [89][90][91], and rare earth ions, e.g., Eu 2+ [92,93], have been done by techniques such as thermal evaporation, sol-gel processing, coprecipitation, microemulsions, etc. In addition to the blue luminescence of ZnS host, emissions in different visible bands due to dopants such as orange luminescence in ZnS:Mn nanoparticles, attributed to the 4 T1- A representative x-ray diffraction (XRD) spectrum of ZnS QDs (Fig.…”