Up-conversion processes in NaLaF4:Er3+

Šarakovskis, Anatolijs; Grūbe, Jurǵis; Mishnev, Anatoly; Spriņǵis, M.

doi:10.1016/j.optmat.2009.02.015

Cited by 48 publications

(32 citation statements)

References 20 publications

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“…Recently, Lakshminarayana et al 128 . 146 The location of the energy levels of lanthanides ions by photo-and thermo-luminescence were studied in NaGdF 4 The main advantage of these works is the low vibrational energies of fluoride matrices. However, the high cost and the difficulty of obtaining extended crystalline matrices represents a real limit to scale-up of these materials.…”

Section: Colour Figurementioning

confidence: 99%

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Pablos-Martín

Durán

Pascual

2012

International Materials Reviews

153

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Rare earth (RE) doped oxyfluoride glass ceramics possess interesting optical properties with applications in telecommunications and optoelectronics, such as solid state lasers, optical amplifiers, etc. These materials combine the transparency and mechanical and chemical resistance of aluminosilicate glasses with the low phonon energy and facile incorporation of RE ions in the fluoride crystals. The incorporation of RE ions in the crystalline phases enhances the laser emission intensity, a major property of these materials. Transparency is achieved when crystal size is in the nanometric scale, usually below 40 nm, which avoids light scattering. A strict control of the nucleation and crystal growth processes is therefore necessary which requires a deep knowledge of the crystallisation mechanisms. The great activity and publications in this field in the last decades merit a review providing a comparative study of the different nanoglass ceramic systems, their structural and optical characterisation and their main properties and applications. This is the objective of this review paper which includes 232 references. A general discussion on glass nucleation and crystallisation theories and more relevant crystallisation parameters and characterisation techniques are put forward in the first section of the review, focused on nanocrystallisation processes in oxyfluoride systems. In the second section, the principal RE doped glass ceramics are presented. After a general introduction about the luminescence processes, including up-and down-conversion, the behaviour of RE elements in glasses and crystals are discussed. Glass ceramic compositions have been divided as follows: glass ceramics with a glass composition following Wang and Ohwaki's oxyfluoride glass ceramic, 1 ; and glass ceramics with different matrix compositions, arranged by crystalline phases. Relevant properties, mainly optical and laser, are described in each system along with the most relevant applications of these materials.

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Section: Colour Figurementioning

confidence: 99%

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Pablos-Martín

Durán

Pascual

2012

International Materials Reviews

153

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“…Excitation in the IR region leads to a strong green luminescence at the doping concentrations below 2 mol % while an orange luminescence occurs at the concentrations above 2 mol %. S 3/2 populates the emitting levels of the green luminescence and the luminescence occurs [22,23]. As observed in the luminescence spectra, the ratio of red-togreen luminescence increases with the rise of impurity concentration.…”

Section: Resultsmentioning

confidence: 82%

Temperature and impurity concentration effects on upconversion luminescence in LaInO3 doped with Er3+

Šarakovskis

Grūbe

Strals

et al. 2016

Low Temperature Physics

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In this paper a novel method for synthesis of LaInO 3 : Er 3+ is reported and upconversion luminescence properties of the synthesized material at different temperatures (9-300 K) are studied. The samples were prepared by co-precipitation and subsequent heat treatment of lanthanum, indium and erbium hydroxides. It is shown that the excitation at 980 nm leads to a strong green upconversion luminescence in the material. At the concentrations above 0.1 mol % of Er 3+ the energy transfer upconversion mechanism of the luminescence becomes evident.Further increase of Er 3+ content in the material leads to higher red-to-green upconversion luminescence intensity ratio. The mechanisms responsible for the observed variation are discussed.

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“…The luminescence spectrum of the G and GC under pulsed excitation at 970 nm reveals traditional luminescence bands corresponding to Er 3 + ion transitions in the green ( 2 H 11/2 -4 I 15/2 , 4 S 3/2 -4 I 15/2 ) and red ( 4 F 9/2 -4 I 15/2 ) spectral regions [14]. In further discussion we will focus our attention on the ''green'' UC luminescence bands of Er 3 + ( 2 H 11/2 -4 I 15/2 and 4 S 3/2 -4 I 15/2 ).…”

Section: Resultsmentioning

confidence: 99%

Excited state absorption and energy-transfer mechanisms of up-conversion luminescence in Er3+-doped oxyfluoride glass ceramics at different temperatures

Šarakovskis

Grūbe

Doke

et al. 2010

Journal of Luminescence

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Up-conversion processes in NaLaF4:Er3+

Cited by 48 publications

References 20 publications

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Temperature and impurity concentration effects on upconversion luminescence in LaInO3 doped with Er3+

Excited state absorption and energy-transfer mechanisms of up-conversion luminescence in Er3+-doped oxyfluoride glass ceramics at different temperatures

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