Transparent Conducting CdO Thin Films Fabricated by Low Cost Simplified Spray Technique Using Perfume Atomizer
Journal Title: International Journal of Scientific Research and Reviews - Year 2013, Vol 2, Issue 3
Abstract
Highly crystalline transparent conducting cadmium oxide thin films were fabricated at 325ºC by employing an inexpensive, simplified spray technique using perfume atomizer. X-ray diffraction peaks depict that the films have a polycrystalline structure of cubic phase, with a (1 1 1) preferred orientation. The microstructural parameters such as strain, dislocation density and number of crystallites were found to be equal to 1.003 x 10-3, 8.163 x 1014 lines/m2 and 1.294 x 1022 / unit area respectively. The dislocation density is very low, indicating the good crystallinity of the films. The crystallite size was found to be equal to 35 nm. The band gap energy was found to be equal to 2.25 eV. The refractive index and packing density of the film were 1.81 and 2.07 respectively. M-1 and M-3 moments of the optical spectrum were found to be equal to 2.178 and 237 x 10-3 (eV)-2 respectively. The resistivity was found to be in the order of 10-5 ohm-cm and the activation energy is equal to 0.05 eV. The films were found to have desirable figure of merit (1.194 x 10-3 (Ω/)-1) suitable for solar cell applications and low temperature coefficient of resistance (-1.434 x 10-3 / K). Hence this simplified spray technique may be considered as an alternative to the conventional spray technique to coat device quality cadmium oxide thin films over large area.
Authors and Affiliations
Usharani K , Balu AR , Shanmugavel G , Suganya M , Nagarethinam VS
Keywords
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