Sulphur doping induced band gap narrowing and enhancement of green emission in ZnO nanorods
Journal of Materials Science: Materials in Electronics, ISSN: 1573-482X, Vol: 33, Issue: 29, Page: 22851-22861
2022
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Article Description
Sulphur doped ZnO nanostructures were synthesized by a cost-effective wet chemical method. Structural characterization indicated that the samples crystallized in wurtzite structure of ZnO along with the appearance of an additional peak corresponding to ZnS phase. The intensity of the ZnS peak increased with increasing sulphur doping concentration in ZnO. Morphological characterization revealed the nanorod features in all the samples. The size of the nanorods, initially decreased with increasing sulphur doping concentration to 10% and the same showed a maximum and minimum values at a sulphur doping concentration of 20% and 30%, respectively. The optical band gap of ZnO decreased from 3.21 to 3.01 eV and the emitted colour shifted from blue to green region with the enhancement of sulphur doping concentration from 0 to 30%. In addition, these samples show dye degradation activity under visible light irradiation. The suppression of UV emission band intensity, enhancement of green emission band in PL spectra and the dye degradation activity indicate that our samples could be useful for multifunctional applications like UV blocking agent, optoelectronics devices and photocatalyst.
Bibliographic Details
Springer Science and Business Media LLC
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