“…Transparent conducting oxide (TCO) films using doped forms of ZnO, SnO 2 , In 2 O 3 and so on are extensively used for solar cells and flat display devices. Various deposition techniques like sputtering , pulsed laser deposition , chemical vapor deposition , molecular beam epitaxy , hydrothermal reaction , sol–gel , electrochemical deposition , and spray pyrolysis have been used for deposition of TCO coatings. In comparison with other deposition techniques, spray technique offers several advantages like high deposition rate, excellent control of overall stoichiometry, high deposition efficiency, and easy coverage over large area .…”