کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1607021 | 1516232 | 2016 | 5 صفحه PDF | دانلود رایگان |
• R3P4O13:Bi2+ (R = Sr and Ba) phosphors are synthesized by solid state reaction method in air.
• The red emission owing to 2P3/2(1) → 2P1/2 the transition of Bi2+ ions can be observed.
• The strong excitation bands peaking at ∼450 nm match with the 450 nm blue LED chip.
• The luminous mechanism is explained by energy level diagram of Bi2+ ions.
Novel red phosphors R3P4O13:Bi2+ (R = Sr and Ba) are synthesized by solid state reaction method in air, and their crystal structures and fluorescence properties are characterized. The excitation bands peaking at ∼440 nm match with the blue LED chip, and their red emission band peaking at ∼658 and 686 nm within the range 580–800 nm owing to 2P3/2(1) → 2P1/2 the transition of Bi2+ ions can be observed, respectively. The relation between Bi2+ doping concentration and emission intensity is discussed and the optimal Bi2+ ion doping concentration is ∼3.0 mol%. Decay curves and time-resolved spectra confirm that R3P4O13:Bi2+ (R = Sr and Ba) phosphors have only single Bi2+ center. The luminous mechanism is explained by energy level diagram of Bi2+. The luminescence properties indicate that R3P4O13:Bi2+ (R = Sr and Ba) phosphors have a potential to be used as red emitting phosphor candidate for white LEDs based on ∼440 nm blue LED chip.
PL spectra and chromaticity coordinate of Novel red phosphors R3P4O13:Bi2+ (R = Sr and Ba) with excitation 445 and 435 nm, respectively.Figure optionsDownload as PowerPoint slide
Journal: Journal of Alloys and Compounds - Volume 661, 15 March 2016, Pages 77–81