Growth and luminescent properties of scintillators based on the single crystalline films of Lu3−xGdxAl5O12:Ce garnet. (April 2015)

• Record Type: Journal Article
• Authors: Zorenko, Yu; Gorbenko, V.; Vasylkiv, Ja; Zelenyj, A.; Fedorov, A.; Kucerkova, R.; Mares, J.A.; Nikl, M.; Bilski, P.; Twardak, A.
• Is Part Of: Materials research bulletin. Volume 64(2015:Apr.)
• Page Start: 355
• Page End: 363
• Publication Date: 2015-04
• Subjects: Thin films -- Oxides -- Epitaxial growth -- X-ray diffraction -- Crystal structure -- Defects -- Optical properties -- Luminescence; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2015.01.020
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Single crystalline films of Lu3− x Gd x Al5 O12 garnets at x = 0 ÷ 3.0 were grown by LPE method onto YAG substrates. Lattice constant of Lu3− Gd x Al5 O12 :Ce film and the misfit m between films and YAG substrate changed linearly with increasing of Gd content. Effective Gd 3+ –Ce 3+ energy transfer occurs in the Lu3− x Gd x Al5 O12 :Ce films. Best scintillation light yield is observed in the Lu3 Al5 O12 :Ce and Lu2.4 Gd0.6 Al5 O12 :Ce films. Increase of the Gd content in x = 1.5–2.5 range results in decreasing the scintillation LY of Lu3− x Gd x Al5 O12 :Ce films. Abstract: The work is related to the growth of scintillators based on the single crystalline films (SCF) of Ce 3+ doped Lu3− Gd x Al5 O12 mixed rare-earth garnets by Liquid Phase Epitaxy (LPE) method. We have shown, that full set of Lu3− Gd x Al5 O12 SCFs with x values ranging from 0 to 3.0 can be successfully crystallized by the LPE method onto Y3 Al5 O12 (YAG) substrates from the melt-solutions based on PbO-B2 O3 flux. The absorption, X-ray excited luminescence, photoluminescence, thermoluminescence and light yield measurements, the latter under excitation by α-particles of 239 Pu and 241 Am radioisotopes, were applied for their characterization.