Spectral and kinetic characteristics of pyroelectric luminescence in LiGaO2

Trinkler, L.; Trukhin, A.N.; Cipa, Janis; Bērziņa, B.; Korsaks, V.; Chou, Ming-Shean; Li, Chuan

doi:10.1016/j.optmat.2019.05.014

Cited by 4 publications

(2 citation statements)

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“…It shows a strong persistent luminescence under ambient conditions along with thermoluminescent and pyroelectric luminescent properties. Consequently, it is highly regarded as a promising phosphor material for fluorescent lamps in plant growth applications. − Apart from its optical properties, solid β-LiGaO 2 also demonstrates intriguing mechanical characteristics such as elasticity and piezoelectricity . β-LiGaO 2 has also found applications as a ceramic tritium breeder material in experimental fusion reactors. , It serves as a lattice-matched substrate for the growth of GaN, InN, and ZnO and as a solid gallium precursor source material for bulk GaN crystal growth. , Recent studies have indicated the applicability of these ceramic phosphors in various biological fields due to their biocompatible nature and promising NIR luminescence properties when doped with transition-metal elements. , Iron (Fe 3+ ) is an efficient transition-metal dopant for achieving the NIR luminescence and persistent luminescence in LiGaO 2 . − …”

Section: Introductionmentioning

confidence: 99%

“…Consequently, it is highly regarded as a promising phosphor material for fluorescent lamps in plant growth applications. 8 − 10 Apart from its optical properties, solid β-LiGaO 2 also demonstrates intriguing mechanical characteristics such as elasticity and piezoelectricity. 11 β-LiGaO 2 has also found applications as a ceramic tritium breeder material in experimental fusion reactors.…”

Section: Introductionmentioning

confidence: 99%

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High-Pressure Near-Infrared Luminescence Studies of Fe³⁺-Activated LiGaO₂

Somakumar,

Bulyk,

Tsiumra

et al. 2023

Inorg. Chem.

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A 0.25% iron (Fe3+)-doped LiGaO2 phosphor was synthesized by a high-temperature solid-state reaction method. The phosphor was characterized utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), high-pressure photoluminescence, and photoluminescence decay measurement techniques using diamond anvil cells (DACs). The powder X-ray analysis shows that the phosphor is a β polymorph of LiGaO2 with an orthorhombic crystallographic structure at room temperature. The SEM result also confirms the presence of well-dispersed micro-rod-like structures throughout the sample. The photoluminescence studies in the near-infrared (NIR) range were performed at ambient, low-temperature, and high-pressure conditions. The synthesized phosphor exhibits a photoluminescence band around 746 nm related to the 4T1 → 6A1 transition with a 28% quantum efficiency at ambient conditions, which shifts toward longer wavelengths with the increase of pressure. The excitation spectra of Fe3+ are very well fitted with the Tanabe–Sugano crystal-field theory. The phosphor luminescence decays with a millisecond lifetime. The high-pressure application transforms the β polymorph of LiGaO2 into a trigonal α structure at the pressure of about 3 GPa. Further increase of pressure quenches the Fe3+ luminescence due to the amorphization process of the material. The prepared phosphor exhibits also mechanoluminescence properties in the NIR spectral region.

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