کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1487039 | 1510692 | 2016 | 4 صفحه PDF | دانلود رایگان |
• BaZrSi3O9:Bi3+ has a broad absorption band in 300–400 nm and gives bright yellow emission.
• BaZrSi3O9:Bi3+ exhibits a good thermal stability with increasing heating temperature.
• BaZrSi3O9:Bi3+ shows excitation-dependent emission.
A yellow-emitting phosphor, BaZrSi3O9:Bi3+, was synthesized in air via solid state reaction method. Luminescence properties of this phosphor were examined by steady-state and time-resolved as well as temperature-dependent luminescence spectra. The obtained BaZrSi3O9:Bi3+ sample shows strong absorption in 300–400 nm, and gives bright and broad yellow emission centered at 560 nm upon 350 nm excitation. The broad emission is originated from 3P1 → 1S0 transition of Bi3+, which has a lifetime around ∼1 μs in BaZrSi3O9. Upon heating in the temperature range from room temperature to 250 °C, accompanied by the emission intensity deceases (emission intensity at 150 °C retains 76% its initial intensity at room temperature), the emission of Bi3+ in BaZrSi3O9 is blue-shifted, which is ascribed to the thermally active phonon-assisted tunneling from the lower energy to the higher energy emission band in the excited states of Bi3+.
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Journal: Materials Research Bulletin - Volume 83, November 2016, Pages 336–339