International Journal of
TechnoChem Research

ISSN 2395 - 4248

LOGIN

INDEXING

NEWS & UPDATION

  • Released Released 2016, V2N1 issue of International Journal of TechnoChem Research
  • 2016 Volume 2, No 2 of International Journal of TechnoChem Research is released.

    2016 Volume 2, No 2, of International Journal of TechnoChem Research is released

  • Included in CAS Database, USA [by Chemical Abstracts Service, USA]
  •  International  Journal of TechnoChem Research

    has been selected for inclusion in CAS,USA  by  Chemical Abstracts Service, USA.

  • International Journal of TechnoChem Research
  • International Journal of TechnoChem Research has been selected for inclusion in CAS,USA by Chemical Abstracts Service, USA.

    International Journal of TechnoChem Research has been selected for inclusion in CAS,USA by Chemical Abstracts Service, USA.

ABSTRACT

Influence of Mn2+ doping on the optical properties of ZnSxO1-xquantum dots

G. Janita Christobel and C.K. Mahadevan

ABSTRACT

The physical properties of two semiconductor quantum dots like ZnO and ZnS are found to get modified significantly when they are mixed with each other or doped with a transition metal element. With an aim of discovering new useful quantum dots, in the present study, we have prepared Mn2+ doped ZnSxO1-x nanocomposite quantum dots (x = 0.0, 0.2, 0.4, 0.5, 0.6, 0.8 and 1.0) by a simple solvothermal method using a domestic microwave oven. Powder X-ray diffraction, scanning electron microscopic and energy dispersive X-ray absorption spectroscopic analyses were carried out to characterise the prepared quantum dots chemically and structurally. UV-Vis-NIR absorption, photoluminescence (PL) and photoconductivity measurements have been carried out to understand the influence of Mn2+ doping on the optical properties of ZnSxO1-x quantum dots. Results obtained indicate significant changes in the optical properties like absorption edge wavelength, PL yield and photoconductivity. All the nanocrystals (quantum dots) prepared in the present study are found to have their absorption edge wavelengths within the UV region, exhibit five prominent peaks (observed at around 400, 440,480, 490 and 530 nm) in the PL spectra and possess positive photoconductivity. Keywords: Quantum dots, Doped ZnSxO1-x nanocrystals, Solvothermal method, Optical properties.

[Full Text Article]