Structural and optical properties of electron beam evaporated CdSe thin films

Abstract

Thin films of cadmium selenide (CdSe) as a semiconductor is well suited for opto-electronic applications such as photo detection or solar energy conversion, due to its optical and electrical properties, as well as its good chemical and mechanical stability. In order to explore the possibility of using this in optoelectronics, a preliminary and thorough study of optical and structural properties of the host material is an important step. Based on the above view, the structural and optical properties of CdSe films have been studied thoroughly in the present work. The host material, CdSe film, has been prepared by the physical vapour deposition method of electron beam evaporation (PVD: EBE) technique under a pressure of 5 × 10 -5 mbar. The structural properties have been studied by XRD technique. The hexagonal structure with a preferred orientation along the (0 0 2) direction of films has been confirmed by the X-ray diffraction analysis. The films have been analysed for optical band gap and absorbed a direct intrinsic band gap of 1⋅92 eV.

Effect of Substrate Temperature on the Structural and Optical Properties of Nanocrystalline Cadmium Selenide Thin Films Prepared by Electron Beam Evaporation Technique

“…Among the various deposition techniques available for the preparation of CdSe thin films, the electron beam evaporation (EBE) technique is very important and promising deposition technique, because it is relatively simple, inexpensive and convenient, in particular for large area deposition. Also this method has been considered largely for the growth of device quality thin films [16][17][18]. The photovoltaic device performance of CdSe films basically depends on their structural, sur-(623) face morphological, compositional and optical properties.…”

Study of the correlation between structural and photoluminescence properties of CdSe thin films deposited by close-spaced vacuum sublimation

“…CdSe thin films can be obtained by different techniques such as chemical [4], photochemical [5] and electrochemical vapor deposition [6,7], electron-beam [8], magnetron [9] and thermal [10][11][12][13][14] evaporation in vacuum, laser ablation [15] and close-spaced vacuum sublimation (CSVS) [16,17]. Hexagonal cadmium selenide nanorods were grown by a solvothermal technique [18].…”

Synthesis and Characterization of Nanostructured Thin Films of (CdS)0.6 Se0.4 for Solar Cell

“…The thin film synthesis technique alters the properties of the films. There are various techniques for the synthesis of thin films, sputtering [8], thermal Evaporation [9,10],MBE [11], CBD [12,13], spray pyrolysis [14] electron beam deposition [15].…”