Analysis of the physicochemical and optical characteristics, as well as the adhesion properties of YAG : Ce3+ phosphors for laser illumination devices

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Abstract

The present scientific article encompasses an analysis of the physicochemical and optical characteristics, as well as adhesion properties of two luminescent materials based on yttrium aluminum garnet, doped with cerium. The aim of the study was to determine the potential usage of these luminescent materials in laser lighting devices. To achieve this, the luminescence spectrum and color diagrams were analyzed when the luminescent materials were subjected to laser radiation with various power and current values. The results revealed that both examined luminescent materials possess high luminous efficiency when current is applied. However, after six months of operation, the luminescent systems exhibited differences in their adhesion properties. Additionally, the study produced a block diagram of a device designed to analyze the physicochemical parameters of laser luminescent systems under the influence of laser radiation with λ = 405–450 nm. With the aid of this device, data on the characteristics of the luminescent materials under different current values were obtained, providing a more precise control over their degradation processes. The investigation demonstrated that both examined luminescent materials can be utilized in laser lighting devices, but one of the luminescent material samples proved to be a more stable and durable material due to its better adhesion with the substrate. The proposed results can be beneficial in the development of new laser lighting tools.

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About the authors

S. M. Zuev

MIREA — Russian Technological University; Central Scientific Research Automobile and Automotive Engines Institute

Author for correspondence.
Email: sergei_zuev@mail.ru
Russian Federation, Moscow; Moscow

D. A. Prokhorov

MIREA — Russian Technological University; Central Scientific Research Automobile and Automotive Engines Institute

Email: sergei_zuev@mail.ru
Russian Federation, Moscow; Moscow

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Supplementary files

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2. Fig. 1. Energy-dispersive X-ray spectrum of the LSID-560 phosphor.

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3. Fig. 2. Energy-dispersive X-ray spectrum of the FLS-540 sample.

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4. Fig. 3. Kinetic curves of current (a), voltage drop (b) and electric power (c) at I = 1.0 A of the device that allows analyzing the physicochemical parameters of laser phosphor systems for LSID-560, supplied to the laser diode.

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5. Fig. 4. The same as in Fig. 3, for FLS-540.

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6. Fig. 5. Luminescence spectra (a, c) and color diagrams (b, d) of luminophores LSID-560 and FLS-540 (c, d) when exposed to laser radiation with I = 1.0 A.

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7. Fig. 6. Dependence of the luminous flux (Φ) on the current supplied to the laser diode for phosphors LSID-560 (1) and FLS-540 (2).

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8. Fig. 7. General view of the luminescent film LSID-560 during its manufacture (a) and its time degradation after six months from the date of manufacture (b), associated with its adhesion and chemical properties; general view of the luminescent film FLS-540 during its manufacture (c) and after six months from the date of manufacture (d).

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