Effect of Substrate Temperature on Some Properties Doubly Doped Tin Oxide Thin Films Deposited by Using Spray Pyrolysis

SnO2 thin films doped Sb and F (AFTO) were prepared on glass by spray pyrolysis technique at different substrate temperatures. The prime aim of this work was to investigate effect of substrate temperature on some properties (spectroscopic, electrical etc.). FTO films are polycrystalline and orientations preferentially along (110) and (200) directions and have <50% transmittance but good absorption values in the visible region and band gaps of these films lie between 3.07 eV and 3.73 eV. SEM and AFM studies revealed the surface of AFTO thin films to be made of nanocrystalline particles. From FTIR studies, the main IR features of AFTO thin films at 560 and 647 cm(-1) are ascribed to Sn-O and O-Sn-O stretching vibrations, respectively. No report has been published about PLQY of inorganic materials as far as authors know. So, PLQY value of an inorganic material such as tin oxide was measured for the first time.