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Optical and electrical properties of SnO 2:Sb thin films deposited by oblique angle deposition

Optical and electrical properties of SnO 2:Sb thin films deposited by oblique angle deposition,10.1016/j.apsusc.2009.09.084,Applied Surface Science,Xi

Optical and electrical properties of SnO 2:Sb thin films deposited by oblique angle deposition  
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The antimony doped tin oxide (SnO2:Sb) (ATO) thin films were prepared by oblique angle electron beam evaporation technique. X-ray diffraction, field emission scanning electron microscopy, UV–vis–NIR spectrophotometer and four-point probe resistor were employed to characterize the structure, morphology, optical and electrical properties. The results show that oblique angle deposition ATO thin films with tilted columns structure are anisotropic. The in-plane birefringence of optical anisotropy is up to 0.035 at α=70°, which means that it is suitable as wave plate and polarizer. The electrical anisotropy of sheet resistance shows that the sheet resistance parallel to the deposition plane is larger than that perpendicular to the deposition plane and it can be changed from 900Ω/□ to 3500Ω/□ for deposition angle from 40° to 85°, which means that the sheet resistance can be effectively tuned by changing the deposition angle. Additionally, the sandwich structure of SiO2 buffer layer plus normal ATO films and oblique angle deposition ATO films can reduce the resistance, which can balance the optical and electrical anisotropy. It is suggested that oblique angle deposition ATO thin films can be used as transparent conductive thin films in solar cell, anti-foggy windows and multifunctional carrier in liquid crystal display.
Journal: Applied Surface Science - APPL SURF SCI , vol. 256, no. 6, pp. 1636-1640, 2010
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