Title :
Nanostructured ZnO thin films by uncovered hydrothermal method for solar cell application
Author :
Haque, Md R. ; Mandal, R.S. ; Islam, Md Shariful ; Hossain, Md Faruque
Author_Institution :
Dept. of Electr. & Electron. Eng., Rajshahi Univ. of Eng. & Technol., Rajshahi, Bangladesh
Abstract :
Nanostructured ZnO thin films have been deposited on ZnO seed layer by the uncovered hydrothermal method at low temperature of 85°C. The ZnO seed layer has prepared on SnO2:F glass substrate by using spray pyrolysis method with constant substrate temperature of 400°C. The films are characterized with various deposition times. Morphologies, crystalline structure and optical transmission of prepared nanostructures were investigated by a scanning electron microscope, X-ray diffraction and Ultraviolet-visible spectrophotometer, respectively. The XRD results showed that ZnO nanostructures were wurtzite-structure (hexagonal) ZnO. The ZnO films has confirmed the nanostructures of nanoflakes, nanosticks and nanospores. These films show the band gap of 2.82-2.88 eV, which is very suitable for solar cell application.
Keywords :
II-VI semiconductors; X-ray diffraction; crystallisation; energy gap; liquid phase deposition; nanofabrication; nanostructured materials; pyrolysis; scanning electron microscopy; semiconductor thin films; solar cells; spectrophotometers; spraying; thin film devices; ultraviolet spectra; visible spectra; wide band gap semiconductors; zinc compounds; SnO2:F; X-ray diffraction; XRD; ZnO; crystal morphology; crystalline structure; deposition times; electron volt energy 2.82 eV to 2.88 eV; glass substrate; nanoflakes; nanospores; nanosticks; nanostructured thin film; optical transmission; scanning electron microscope; seed layer; solar cell; spray pyrolysis method; temperature 400 degC; temperature 85 degC; ultraviolet spectrophotometer; uncovered hydrothermal method; visible spectrophotometer; wurtzite structure; Dye-sensitized solar cell; Hydrothermal; Nanostructure; Spray pyrolysis; ZnO;
Conference_Titel :
Electrical & Computer Engineering (ICECE), 2012 7th International Conference on
Conference_Location :
Dhaka
Print_ISBN :
978-1-4673-1434-3
DOI :
10.1109/ICECE.2012.6471494
