Structural, Optical and Photoelectric Properties of Nano-Crystalline CdS Thin Films Deposited by Electron Beam Evaporation
CdS thin films were deposited on glass substrates by electron beam evaporation with varying substrate temperatures. The films were annealed at 400 °C in nitrogen atmosphere, and the effects of substrate temperature on structural, optical and photoelectric properties were studied. X-ray diffraction showed that the preferred orientation of (002) plane increased first and then decreased. The surface morphology was measured by atomic force microscope and exhibited the homogeneous grain distribution and gradual increase in particles size. Furthermore, the improved absorption coefficient and reduced energy gap were deduced through the transmittance that was approximately 70% in visible region. Photoconductivity curves were investigated and revealed that the sample at substrate temperature of 200 °C had the fastest pulse response, lowest dark conductivity and saturated photoconductivity, and highest gain of photoconductivity.
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Document Type: Short Communication
Publication date: July 1, 2017
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- Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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