<abstract xmlns="http://www.w3.org/1999/xhtml">In the present work a systematic study was carried out to understand the influence of Sc doping on electronic and optical properties of CdS nanoparticles. The geometry optimization and symmetry computation for CdS and Sc doped CdS nanoparticles using Density Functional Theory (DFT) on B3LYP level with the QZ4P for Cd and DZ2P for sulphur and Sc were performed by Amsterdam Density Functional (ADF). The results show that HOMO-LUMO gap as well as electronic and optical properties of CdS clusters vary with Sc doping. The HOMO-LUMO gap is affected by the dopant and its value decreases to 0.6 eV. Through considering the numerical integration scheme in the ADF package, we investigated different vibrational modes and our calculated Raman and IR spectra are consistent with the reported result. The calculated IR and Raman peaks of CdS and Sc doped CdS clusters were in the range of 100 to 289 cm−1, 60 cm−1 to 350 cm−1 and 99 cm−1 to 282 cm−1, 60 cm−1 to 350 cm−1, respectively, which was also confirmed by experiment as well as a blue shift occurrence. Subsequently, for deeper research of pure and doped CdS clusters, their absorption spectra were calculated using time-dependent DFT method.</abstract>

In the present work a systematic study was carried out to understand the influence of Sc doping on electronic and optical properties of CdS nanoparticles. The geometry optimization and symmetry computation for CdS and Sc doped CdS nanoparticles using Density Functional Theory (DFT) on B3LYP level with the QZ4P for Cd and DZ2P for sulphur and Sc were performed by Amsterdam Density Functional (ADF). The results show that HOMO-LUMO gap as well as electronic and optical properties of CdS clusters vary with Sc doping. The HOMO-LUMO gap is affected by the dopant and its value decreases to 0.6 eV. Through considering the numerical integration scheme in the ADF package, we investigated different vibrational modes and our calculated Raman and IR spectra are consistent with the reported result. The calculated IR and Raman peaks of CdS and Sc doped CdS clusters were in the range of 100 to 289 cm−1, 60 cm−1 to 350 cm−1 and 99 cm−1 to 282 cm−1, 60 cm−1 to 350 cm−1, respectively, which was also confirmed by experiment as well as a blue shift occurrence. Subsequently, for deeper research of pure and doped CdS clusters, their absorption spectra were calculated using time-dependent DFT method.

A DFT study of the effects of Sc doping on electronic and optical properties of CdS nanoparticles

Sustainable Energy Technologies Center, College of Engineering

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In the present work a systematic study was carried out to understand the influence of Sc doping on electronic and optical properties of CdS nanoparticles. The...

A DFT study of the effects of Sc doping on electronic and optical properties of CdS nanoparticles

Published Online: Jan 06, 2016

Page range: 782 - 791

Received: Dec 31, 2014

Accepted: Sep 11, 2015

DOI: https://doi.org/10.1515/msp-2015-0110

Keywords
Sc doped CdS, vibrational modes, Raman, IR, absorption spectrum, H-L gap, DOS, isosurface plots, Density Functional Theory

© 2015 Shafiq Ur Rehman et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A DFT study of the effects of Sc doping on electronic and optical properties of CdS nanoparticles

Published Online: Jan 06, 2016

Page range: 782 - 791

Received: Dec 31, 2014

Accepted: Sep 11, 2015

DOI: https://doi.org/10.1515/msp-2015-0110

KeywordsSc doped CdS, vibrational modes, Raman, IR, absorption spectrum, H-L gap, DOS, isosurface plots, Density Functional Theory

© 2015 Shafiq Ur Rehman et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Sc doped CdS, vibrational modes, Raman, IR, absorption spectrum, H-L gap, DOS, isosurface plots, Density Functional Theory