Enhanced Structural and Photoelectric Properties of CdCl2 Coated CdS Thin Films Deposited by Magnetron Sputtering
In this work, we investigated the effect of CdCl2 coating on the structural and photoelectric properties of CdS thin films prepared by magnetron sputtering. Compared with the sample without CdCl2 coating, X-ray diffraction pattern (XRD) of CdCl2 coating sample showed that the preferred orientation at (002) plane was enhanced by six times, and scanning electron microscope (SEM) exhibited the surface morphology with larger grain size. Energy dispersive spectrometer (EDS) images showed the atomic ratio of Cd/S was 1.05 which was closing to 1:1. I–V curves showed the linear characteristics similar to ohmic behavior. Photoconductivity curves presented rapid response for the CdS thin films with CdCl2 coating. Furthermore, the lowest dark conductivity (0.07 × 10–5 Ω–1 ·cm–1) and highest photoconductivity gain (G p ≈50) were presented in blue light, which indicated an application prospect for photoelectric sensors and detectors.
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Document Type: Short Communication
Publication date: September 1, 2017
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