STRUCTURAL AND OPTICAL PROPERTIES OF CADMIUM SULFIDE NANOPARTICLES PREPARED BY PRECIPITATION METHOD

Vidhya P,Ranjitkumar R,Chandar Shekar B,Balaganesh A.S,Ranjitha A

doi:10.26524/krj281

Abstract

Cadmium Sulfide nanoparticles were prepared by a simple and cost effective precipitation method. Xray analysis revealed broad diffraction peaks indicating that the particles are of very small size. The prominent broad peaks at 2θ values of 26.48°, 43.90°, and 51.91°, which could be indexed to the (002), (110) and (112) direction of the hexagonal phase of CdS. Optical studies showed maximum absorbance in the UV region but minimum absorbance in the VIS-NIR regions make it an excellent material for screening off UV portion of electromagnetic spectrum in UV filters and sensors.

Highlights

The optical properties are based on the large variations of the band gap as a function of particle size, which is a consequence of quantum confinement [4,5,6]
The confinement effect is observed for Cadmium Sulfide (CdS) nanoparticles when the particle sizes are equal to or less than 50 Å [4,5]
The optical properties of CdS nanoparticles have been extensively studied in recent years as this material exhibits pronounced quantum size effects [7]

Summary

EXPERIMENTAL

Semiconductor nanoparticles has been an interesting field of research for more than three decades because it gives an opportunity to understand the physical properties in low dimensions and to explore their potential applications in the field of optoelectronics [1,2,3]. The optical properties are based on the large variations of the band gap as a function of particle size, which is a consequence of quantum confinement [4,5,6]. The confinement effect is observed for Cadmium Sulfide (CdS) nanoparticles when the particle sizes are equal to or less than 50 Å [4,5]. The optical properties of CdS nanoparticles have been extensively studied in recent years as this material exhibits pronounced quantum size effects [7]. In the present work an attempt has been made to study the structural and optical properties of CdS nanoparticles prepared by chemical precipitating method

Synthesis of CdS nanoparticles

RESULTS AND DISCUSSION

Optical properties

CONCLUSION