TY - JOUR
T1 - Lu2O3:Eu3+ glass ceramic films
T2 - Synthesis, structural and spectroscopic studies
AU - Carrera Jota, M. L.
AU - García Murillo, A.
AU - Carrillo Romo, F.
AU - García Hernández, M.
AU - Morales Ramírez, A. De J.
AU - Velumani, S.
AU - De La Rosa Cruz, E.
AU - Kassiba, Abdelhadi
N1 - Funding Information:
The authors gratefully acknowledge the financial support of SEP-CONACYT (100764, 136269 and 178817) and SIP – IPN (20130665 and 20130664) projects. M.L. Carrera Jota acknowledges the M.Sc. scholarship from CONACYT. The authors thank the experimental support of CNMN-IPN for structural studies. The authors thank Eng. Alfonso R. for his help in SEM work and Haggeo S. for his technical support in luminescence studies. The authors also would like to thank David Nentwick for the editing work that he did for this paper. The authors would also like to thank M. García Murillo for her assistance.
PY - 2014/3
Y1 - 2014/3
N2 - For the first time, transparent and crack free europium-doped lutetia silica sol-gel films were synthesized using the dip-coating technique on silica quartz substrates. In this study, we examined the effects of incorporating polyvinylpyrrolidone (PVP) and silica (SiO2) into different precursor solutions for different Lu-Si molar ratios: 4:1, 6:1, 8:1 and 10:1. Different systems, such as Lu2O3:Eu3+@SiO2 (using the above Lu:Si molar ratios), were synthesized by sol-gel and by dip-coating technique, employing acetylacetonate lutetium and tetraethylorthosilicate as Lu and Si precursors, in order to produce Lu 2O3:Eu3+ (5 mol%)@SiO2 glass-ceramic films. The film microstructure was studied by microRaman spectroscopy (MRS) and X-ray diffraction (XRD) for different Lu:Si molar ratios on films annealed at 700 C. X-ray diffraction results showed that the lutetium oxide cubic phase crystallizes in the silica matrix at 700 C, and the crystallite size of Lu 2O3:Eu3+@SiO2 films varies from 5 nm to 17 nm according to the respective Lu:Si molar ratios. Opto-geometrical parameters determined by m-lines spectroscopy using a 632.5 nm He-Ne laser showed that the Eu3+ doped films heat-treated at 700 C presented a thickness and density of 1.7 μm (8.8 g cm-3), 970 nm (9.2 g cm-3), 1 μm (9.3 g cm-3) and 1.3 μm (9.25 g cm -3) for the Lu:Si = 4:1, 6:1, 8:1 and 10:1 molar ratio systems, respectively. The Lu:Si = 8:1 system 611 nm emission presented an improvement. These results were provided by photoluminescent spectroscopy.
AB - For the first time, transparent and crack free europium-doped lutetia silica sol-gel films were synthesized using the dip-coating technique on silica quartz substrates. In this study, we examined the effects of incorporating polyvinylpyrrolidone (PVP) and silica (SiO2) into different precursor solutions for different Lu-Si molar ratios: 4:1, 6:1, 8:1 and 10:1. Different systems, such as Lu2O3:Eu3+@SiO2 (using the above Lu:Si molar ratios), were synthesized by sol-gel and by dip-coating technique, employing acetylacetonate lutetium and tetraethylorthosilicate as Lu and Si precursors, in order to produce Lu 2O3:Eu3+ (5 mol%)@SiO2 glass-ceramic films. The film microstructure was studied by microRaman spectroscopy (MRS) and X-ray diffraction (XRD) for different Lu:Si molar ratios on films annealed at 700 C. X-ray diffraction results showed that the lutetium oxide cubic phase crystallizes in the silica matrix at 700 C, and the crystallite size of Lu 2O3:Eu3+@SiO2 films varies from 5 nm to 17 nm according to the respective Lu:Si molar ratios. Opto-geometrical parameters determined by m-lines spectroscopy using a 632.5 nm He-Ne laser showed that the Eu3+ doped films heat-treated at 700 C presented a thickness and density of 1.7 μm (8.8 g cm-3), 970 nm (9.2 g cm-3), 1 μm (9.3 g cm-3) and 1.3 μm (9.25 g cm -3) for the Lu:Si = 4:1, 6:1, 8:1 and 10:1 molar ratio systems, respectively. The Lu:Si = 8:1 system 611 nm emission presented an improvement. These results were provided by photoluminescent spectroscopy.
KW - A. Optical materials
KW - B. Sol-gel chemistry
KW - C. Electron microscopy
KW - C. X-ray diffraction
KW - D. Luminescence
UR - http://www.scopus.com/inward/record.url?scp=84892939234&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2013.12.029
DO - 10.1016/j.materresbull.2013.12.029
M3 - Artículo
SN - 0025-5408
VL - 51
SP - 418
EP - 425
JO - Materials Research Bulletin
JF - Materials Research Bulletin
ER -