SYNTHESIS OF SYSTEM CASNO3 : YB3+,ER3+,НО3+ SYSTEM AND IR−EXCITATION STUDY OF ITS LUMINESCENCE
https://doi.org/10.17073/1609-3577-2017-1-45-50
Abstract
Features of solid−phase synthesis and a research technique of the perovskit structure of calcium stannat activated by three ions of the rare−earth elements Yb3+, Er3+, Ho3+ are described. It is established that for the formation of luminescent structure of CaSnO3 : Yb3+, Er3+, to Ho3+ the following conditions of synthesis are required: calcination temperature 1250 °C and duration at least 18 h. the luminescent properties of the samples for excitation were probed by a semiconductor laser diode with a 960 nm wavelength. Luminescence emission bands in the visible and IR−regions were recorded. We show that Yb3+ ions preferentially act as sensitizers and are capable to transfer part of the absorbed energy to Er3+ ions and Ho3+, causing a luminescence gain in the bands corresponding to them. Er3+ ions also transfer part of the absorbed energy to Ho3+ ions, and therefore an intensity gain of IR luminescence in the bands at 1194 and 1950 nm is observed. The diagram of energetic transitions is provided for the CaSnO3 : Yb3+, Er3+, Ho3+ system for excitation by a laser with a 960 nm wavelength, and the mechanism of energy transmission between ions of Yb3+, Er3+, Ho3+ is explicitly described. The dependence of the luminescence intensity of the studied phosphor in the area 994, 1194, 1550, 1950 nm on the concentration of Ho3+ ions is studied. The intensity maxima for the emission bands at 1194 and 1950 nm are observed for Ho3+ ion concentration of 0.007 atomic shares. It is suggested to use the CaSnO3 : Yb3+, Er3+, Ho3+ luminescent structure as the source of radiation capable to transform IR radiation in the 960 nm region to IR radiation with a wavelength of about 2000 nm.
About the Authors
U. A. Mar’ina
North−Caucasus Federal University.
Russian Federation
Ul’ana A. Mar’ina: Postgraduate Student. 1 Pushkina Str., Stavropol 355009.
Russian Federation
Ul’ana A. Mar’ina: Postgraduate Student. 1 Pushkina Str., Stavropol 355009.
V. A. Vorob’ev
North−Caucasus Federal University.
Russian Federation
Russian Federation
Viktor A. Vorob’ev: Dr. Sci. (Eng.), Senior Research, Professor.
1 Pushkina Str., Stavropol 355009.
A. P. Mar’in
North−Caucasus Federal University.
Russian Federation
Russian Federation
Alexandr P. Mar’in: Postgraduate Student.
1 Pushkina Str., Stavropol 355009.
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Review
For citations:
Mar’ina U.A., Vorob’ev V.A., Mar’in A.P. SYNTHESIS OF SYSTEM CASNO3 : YB3+,ER3+,НО3+ SYSTEM AND IR−EXCITATION STUDY OF ITS LUMINESCENCE. Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering. 2017;20(1):45-50. (In Russ.) https://doi.org/10.17073/1609-3577-2017-1-45-50
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