Record Details

<strong>Effect of substrates temperature on structural and optical properties of thermally evaporated CdS nanocrystalline thin films</strong>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <strong>Effect of substrates temperature on structural and optical properties of thermally evaporated CdS nanocrystalline thin films</strong>
 
Added Entry - Uncontrolled Name Singh, Siddhartha ; Department of Physics & Astrophysics University of Delhi 110007
 
Uncontrolled Index Term Nanocrystalline; CdS; Band gap; Optical properties; Thermal evaporation; Scanning Electron Microscopy; X-Ray diffraction
 
Summary, etc. <strong>Nanocrystalline thin films of CdS were deposited by thermal evaporation technique under vacuum (<em>p</em>=2 × 10<sup>-5</sup> torr) on cleaned glass substrates maintained at different temperatures (300, 473 and 573 K). The effect of substrates temperature on structural and optical properties of CdS nanocrystalline thin films has been studied. X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) and Scanning Electron Microscopy (SEM) were used to characterize the CdS nanocrystalline thin films. The optical and structural studies show that film deposited at 300 K was amorphous in nature and films deposited at higher temperatures were crystalline in nature. Optical constants, such as optical band gap was evaluated from these spectra. The optical band gap was found to be in the range 2.38-~2.51 eV.The study of structural and some physical properties of CdS films indicates that they are strongly dependent on the substrate temperature. Crystallinity levels became better at high substrate temperatures (especially for the film obtained at 573 K). Using the optical investigations including the band gap calculations, it was determined that the band gap of CdS films decreases with substrate temperature, due to the changes in grain size and crystallinity. There is a random effect of substrate temperature on band tail values.</strong>
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2015-06-22 13:48:30
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJPAP/article/view/2459
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 52, ##issue.no## 10 (2014): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India © 2015. The Council of Scientific &amp; Industrial Research, New Delhi.