Influence of annealing on optical and photovoltaic properties of nanostructured TiO2 films

7th International Conference Radiation-thermal Effects and Processes in Inorganic Materials

材料科学;物理学

Serikov, T.M.^1 ; Ibrayev, N. Kh.^1 ; Smagulov, Zh. Kh.^1 ; Kuterbekov, K.A.^2

Institute of Molecular Nanophotonics, E.A. Buketov Karaganda State University, Karaganda

100028, Kazakhstan^1

L.N. Gumilyov Eurasian National University, Astana

010000, Kazakhstan^2

关键词: Different structure;    Electron transport resistances;    Impedance spectroscopy;    Kinetic characteristics;    Luminescence spectrum;    Nanostructured TiO2 film;    Photoluminescence bands;    Photovoltaic property;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/168/1/012054/pdf
DOI  :  10.1088/1757-899X/168/1/012054

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Spectral and kinetic characteristics of the photoluminescence of TiO2films obtained from TiO2nanoparticles and nanotubes were studied. Luminescence spectra typical for the TiO2with anatase structure were observed under UV excitation of the films. Heat treatment of the films at T=1273 K leads to a long-wavelength shift of the photoluminescence band with maximum at 850 nm, which corresponds to the rutile structure. The luminescence duration of rutile films is longer than the luminescence duration of the anatase films as for nanoparticles and for nanotubes. The photovoltaic properties of TiO2films with different structures were investigated. It was established that anatase structured films have a higher photocurrent than the rutile structured film. By impedance spectroscopy method it was found that the electron transport resistance in the nanotube films is higher but the recombination rate is lower than in the TiO2nanoparticle films.