Sonochemical driven ultrafast synthesis of Praseodymium doped Y2O3 nanostructures for display applications

International Conference on Advances in Materials and Manufacturing Applications 2017

Venkatachalaiah, K.N.^1,2 ; Nagabhushana, H.^3 ; Basavaraj, R.B.^3 ; Venkataravanappa, M.^4

Department of Physics, Amrita University, Bengaluru

560035, India^1

Research and Development Centre, Bharathiar University, Coimbatore, India^2

Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumakuru

572103, India^3

Department of Physics, Govt. First Grade College, Sira, Tumkur

572 137, India^4

关键词: Diffuse reflectance spectrum;    Display application;    Excitation wavelength;    Maximum intensities;    Photoluminescence emission;    Powder X-ray diffraction (pXRD);    Sonochemical method;    Ultrafast synthesis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012114/pdf
DOI  :  10.1088/1757-899X/310/1/012114

来源: IOP

【 摘 要 】

For the first time Pr3+(1-11 mol %) doped Y2O3nanophosphors were synthesized by ultrasound supported sonochemical method using mimosa pudica (MP) leaves extract as bio-surfactant. The obtained product was heat treated at 700°C for 3 h and used for characterization. The powder X-ray diffraction (PXRD) profiles of nanophosphors showed cubic phase structure. The sonication time and concentration of bio-surfactant play a vital role in tuning the morphologies of Y2O3. The particle size was further confirmed by transmission electron microscope (TEM) and it was found to be in the range of 20-30 nm. The band gap energy of the phosphors were estimated by making use of diffuse reflectance spectrum (DRS) and the values were found to be in the range of 5.67 - 5.80 eV. Under 447 nm excitation wavelength, the photoluminescence (PL) emission spectrum was recorded. The PL emission spectra consist of sharp peaks centred at 554, 612 and 738 nm and were attributed to3P0→3H5,3P0→3H6, and3P0→3F4transitions respectively. The 5 mol% Pr3+doped Y2O3nanophosphors showed maximum intensity. Further CIE and CCT were estimated and found that the color coordinates lies in between (0.593, 0.412) and (0.358, 0.544) respectively. Results obtained evident that the phosphor was highly useful in display device applications.