CdSe Thin Film by Using Spin-Coating

Abstract

CdSe thin film was prepared by using spin coating method .The surface morphology of CdSe thin films can be used as the main material in solar cells application, by using sodium selenosulfate as a selenium source and cadmium chloride as cadmium precursor. The solution for each sample had with different molar ratio of cadmium chloride and sodium selenosulfate to know the comparison between the samples. The spin for each samples were constant parameter with 3000 rpm at 30 seconds and dry in ambient temperature. The characterization using atomic force microscopy (AFM) to know the surface morphology of CdSe thin film. The important thing in this paper was to know the surface morphology of CdSe thin films as the comparison with other experiment for solar cells application.

Cadmium Selenide Quantum Dots for Solar Cell Applications: A Review

“…After the gross contamination is removed, the type and amount of contaminants to which the surface is exposed must be controlled. CdSe thin films are usually deposited on commercial microscope glass slides/ fluorine-doped tin oxide (FTO) substrates [93] with a size of 75 × 25 × 1.35 mm, [129] 2 cm 2 : [130] These substrates are preliminarily cleaned in a detergent solution, such as deionized water for 30 min [93] or an HNO 3 solution for 24 h. [129] Then, they have cleaned again in an ultrasonic bath with acetone, ethanol, [131] xylenes for 10 min, [132] or 5 min. [130] This process ensures a clean surface, which is important for the creation of the nucleation centers needed for the thin film deposition.…”

“…In 2006, Han et al [134] published hybrid SCs based on zincblende CdSe NCs/poly(2-methoxy-5-(2 ' -ethylhexoxy)-p-phenylenevinylene), which were obtained through the simple spincoating and subsequent annealing at 180°C with a significantly improved PCE of about 0.85%, even 1% for some applications. Rosmani et al [131] prepared CdSe by spin coating sodium selenosulfate as the Se source at 3000 rpm for 30 s and rising the molarity ratio between the Cd and Se precursors; the solution was spin-coated in 3 layers to increase the final resistivity. Alves et al [135] examined hybrid systems based on polymer/fullerene mixtures and CdSe NPs and applied them in SCs.…”