Study intra-4f transitions of Sm3+ ions under direct photoexcitation in TiO2

16th International Conference of Students and Young Scientists "Prospects of Fundamental Sciences Development"

自然科学（总论）

Chapura, O.M.^1 ; Mikhnev, L.V.^1 ; Bondarenko, E.A.^1 ; Skomorokhov, A.A.^1 ; R.A., Goncharov ; A.A., Tsagikyan

North-Caucasus Federal University, Pushkin Street 1, Stavropol

355009, Russia^1

关键词: Anatase structures;    Direct excitation;    Doping concentration;    Excitation wavelength;    Luminescent intensity;    Photoluminescence excitation spectrum;    Radiative transitions;    Titanium dioxides (TiO2);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/597/1/012052/pdf
DOI  :  10.1088/1757-899X/597/1/012052

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

A systematic study of photoluminescence transitions of samarium ion (Sm3+) incorporated in titanium dioxide (TiO2) powder with anatase structure has been performed. Perceptible changes of luminescence under direct excitation as compared with indirect excitation of Sm3+ in titanium dioxide (TiO2:Sm3+) have been detected. Measurements of photoluminescence excitation spectra for all detected radiative transition of Sm3+ were accomplished. The values of asymmetry ratio were calculated for different excitation wavelengths. The dependence of luminescent intensity on Sm3+ doping concentration in TiO2 host was studied under direct and indirect excitation. Thus, evidences of the existence of the several Sm3+ sites in anatase TiO2 have been presented in this work.