Optical characterization of ZnO thin films deposited by Sol-gel method

Low-temperature growth and optical properties of ZnO nanorods

“…3(a), three luminescence emission peaks, ultra- violet (UV) emission at 380 nm, green emission at 550 nm and yellow emission at 599 nm, were observed. Generally, the UV emission of ZnO was attributed to an exciton-related activity [9], and the green emission was due to the point defects, such as oxygen vacancies or impurities [10]. The deep level involved in the yellow luminescence was likely interstitial oxygen [11], and perhaps had much to do with the structure of ZnO 2 [12].…”

Room temperature anodic deposition and shape control of one-dimensional nanostructured zinc oxide

“…It can be observed that the sample has two emission peaks, the UV emission at 381 nm (3.2 eV) and the green emission at 515 nm. Generally, the UV emission of ZnO is attributed to an exciton-related activity [21], and the green emission is due to the point defects related to the surface such as oxygen vacancies or impurities [22]. The intensity ratio of the UV to the visible emissions can be used to evaluate the quality of ZnO [23,24].…”

Characterization of ZnO Thin Films Prepared by Thermal Oxidation of Zn

“…6 This material is a n-type semiconductor and has a direct band gap of 3.37 eV at room temperature. 7 Because of its interesting properties, many works were focused on the elaboration of ZnO films by several methods such as magnetron sputtering, 8 molecular beam epitaxy, 9 chemical vapor deposition, 10 pulsed laser deposition (PLD), 11 chemical bath deposition (CBD), 12 spray pyrolysis, 13 solgel, 14 electrochemical deposition, 2 hydrothermal growth 15 and thermal decomposition. 16 Another process to obtain ZnO films is the thermal oxidation of metallic Zn layers which takes advantage of its simplicity of the process.…”