Europium luminescence from amorphous yttrium alumina films on fused silica substrates

7th International Conferences on Physics and Technology of Nanoheterostructure Microwave Electronics: Mokerov Readings 2016;8th International Conferences on Physics and Technology of Nanoheterostructure Microwave Electronics: Mokerov Readings 2017

Villegas Brito, J.C.^1 ; Gaponenko, N.V.^1^4 ; Sukalin, K.S.^1 ; Raichenok, T.F.^2 ; Tikhomorov, S.A.^2 ; Wang, Xiang^3 ; Cheng, Zhiqun^3 ; Kargin, N.I.^4

Belarusian State University of Informatics and Radioelectronics, P. Browki St. 6, Minsk

220013, Belarus^1

Stepanov Institute of Physics, NASB, Nezavisimosti ave. 68, Belarus., Minsk

220072, Belarus^2

Key Laboratory of RF Circuits and Systems, Ministry of Education, Hangzhou Dianzi University, Hangzhou

310018, China^3

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe Shosse 31, Moscow

115409, Russia^4

关键词: Energy dispersive x-ray;    Europium luminescence;    Fused silica substrates;    High-temperature annealing;    Photoluminescence excitation spectroscopy;    Photoluminescence excitation spectrum;    Trivalent europium ions;    Ultraviolet irradiations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/475/1/012019/pdf
DOI  :  10.1088/1757-899X/475/1/012019

来源: IOP

【 摘 要 】

In this work, we investigate photoluminescence of sol-gel derived films corresponding to yttrium alumina garnet Y3Al5O12 doped with trivalent europium. The films with three concentrations of europium 0,02; 0,025; 0,03 M with the thickness 210-220 nm were deposited on fused silica substrates by the corresponding sols' spinning followed by drying and high temperature annealing at 1000 °C for 30 min. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis as well as ellipsometry, photoluminescence (PL) and photoluminescence excitation spectroscopy (PLE). All of the fabricated samples were amorphous and revealed roomerature luminescence bands within the range of 550 - 750 nm corresponding to 5D0 → 7Fj (j = 0,..,4) transitions of trivalent europium ions with the most intensive bands at 610 - 630 nm and 680 - 710 nm. The intensity of europium luminescence increases with europium concentration. The photoluminescence excitation spectra measured at the emission wavelength 710 nm exhibit strong bands at 220 nm, which could be associated with absorption of exciting light within Eu3 + - O2 -bands. Practical application of the obtained films transforming ultraviolet irradiation into visible is discussed.