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Abstract Eu 2+ –doped Ba 3 MgSi 2 O 8 exhibited room-temperature photochromism by laser irradiation. Ultraviolet laser irradiation varied the emission color from blue to purple. The following blue-to-green… Click to show full abstract
Abstract Eu 2+ –doped Ba 3 MgSi 2 O 8 exhibited room-temperature photochromism by laser irradiation. Ultraviolet laser irradiation varied the emission color from blue to purple. The following blue-to-green laser irradiation restored the original blue emission. From the laser-wavelength dependence, it has been found that the observed emission-color variation started with an electron transition from a localized state above the valence band to the conduction band. The degree of the emission-color variation was determined by the number of electrons stably trapped near Eu 2+ if Eu 2+ ions were doped enough.
Journal Title: Journal of Luminescence
Year Published: 2017
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