Sol-gel derived CdS nanocrystalline thin films: optical and photoconduction properties

• Autorzy: Khan Z. R. , Munirah , Aziz A. , Khan M. S.

Identyfikatory

DOI

10.1515/msp-2018-0028

• Języki publikacji: EN

Abstrakty

EN

High-quality CdS nanocrystalline thin films were grown by sol-gel spin coating method at different solution temperatures on glass substrates. As-deposited films exhibited nanocrystalline phase with hexagonal wurtzite structure and showed good adhesion and smooth surface morphology. It was clearly observed that the crystallinity of the thin films improved with the increase in solution temperature. Crystallites sizes of the films also increased and were found to be in the range of 10 mm to 17 nm. The influence of the growth mechanism on the band and sub-band gap absorption of the films was investigated using UV-Vis and photothermal deflection spectroscopy (PDS). The band gap values were calculated in the range of 2.52 eV to 2.75 eV. The band gap decreased up to 9 % with the increase in solution temperature from 45 °C to 75 °C. Absorption coefficients estimated by PDS signal showed the significant absorption in low photon energy region of 1.5 eV to 2.0 eV. The dark and illuminated I-V characteristics revealed that the films were highly photosensitive. The results demonstrated the potential applications of sol-gel grown CdS nanocrystalline thin films as photoconductors and optical switches.

Słowa kluczowe

EN

CdS; sol-gel; optical properties; photothermal deflection spectroscopy; photoconductivity

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2018
• Tom: Vol. 36, No. 2
• Strony: 235--241
• Opis fizyczny: Bibliogr. 27 poz., rys.

Twórcy

autor

Khan Z. R.

• Department of Physics, College of Science, University of Ha’il, P.O. Box-2440, Ha’il, Saudi Arabia

autor

Munirah

• Laser Spectroscopy Lab, Department of Physics, Jamia Millia Islamia, New Delhi-110025, India

autor

Aziz A.

• Laser Spectroscopy Lab, Department of Physics, Jamia Millia Islamia, New Delhi-110025, India

autor

Khan M. S.

• Laser Spectroscopy Lab, Department of Physics, Jamia Millia Islamia, New Delhi-110025, India

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).