کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1493680 | 1510787 | 2015 | 5 صفحه PDF | دانلود رایگان |
• ZnO:Ga(La) nanoparticles were prepared by photo-induced synthesis.
• Two-step annealing leads to the improvement of the luminescence properties.
• Nanoparticles then featured sub-nanosecond photoluminescence decay times.
• Only excitonic emission was observed within 8–300 K temperature interval.
• Simultaneous Ga3+, La3+ codoping further increases luminescence intensity.
Photo-induced synthesis of high-efficiency ultrafast nanoparticle scintillators of ZnO was demonstrated. Controlled doping with Ga(III) and La(III) ions together with the optimized method of ZnO synthesis and subsequent two-step annealing in air and under reducing atmosphere allow to achieve very high intensity of UV exciton luminescence, up to 750% of BGO intensity magnitude. Fabricated nanoparticles feature extremely short sub-nanosecond photoluminescence decay times. Temperature dependence of the photoluminescence spectrum within 8–340 K range was investigated and shows the absence of visible defect-related emission within all temperature intervals.
Journal: Optical Materials - Volume 47, September 2015, Pages 67–71