Spontaneous growth and luminescence of zinc sulfide nanobelts

Abstract

ZnS nanobelts have been synthesized by a simple thermal evaporation method in a N2 atmosphere containing a small amount of CO and H2 gases. The synthesized ZnS nanobelts have a width in the range of 40 to 120 nm, a thickness of 20 nm, and a length of several micrometers. The nanobelts are single crystals with a hexagonal wurtzite structure growing along the [001] direction. A vapor–solid process is proposed for the formation of such nanobelts. The as-prepared nanobelts shows two emission bands, around 450 and 600 nm.

The rapid size- and shape-controlled continuous hydrothermal synthesis of metal sulphide nanomaterials

“…Similar emissions have previously been reported for ZnS nanobelts and attributed to Mn 2+ contamination. 3,4 These authors also reported EDX and TEM results which suggested their product was highly pure. That there is no trace of this orange luminescence in our samples prepared by Method B indicates that this may be a result of the significant twinning observed in the Method A sample.…”

Visible emission characteristics from different defects of ZnS nanocrystals

“…The luminescence features of ZnS are commonly assigned to surface states, 27,28 sulfur vacancies, 29,30 zinc vacancies, [31][32][33][34] elemental sulfur species 20,35 or impurities 17,36 in ZnS. However, it is still unclear what are the luminescent sites contributing to each of the luminescence bands.…”

Optical and Optoelectronic Properties of ZnS Nanostructured Thin Film

“…Zinc sulphide (ZnS) is an important II-VI semiconductor material with a wide direct band gap E g = 3.68 eV (bulk) [7]. ZnS has been studied due to its wide applications as phosphors and catalysts [8]. ZnS is also applicable for a variety of other applications such as electro-luminescent devices, solar cells, and many other optoelectronic devices.…”