کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9784006 | 1512027 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of trivalent rare-earth ions on spectral properties of PbWO4 crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
The pure and trivalent rare-earth ions doped lead tungstate crystals have been grown using Czochralski method. Optical absorption measurements in the wavelength range of 200-800Â nm have been carried out on the doped PbWO4 crystals. Trivalent rare-earth ions doping have a threshold effects on the optical absorption band gap of PbWO4 crystals. Compared to that of pure PbWO4, the optical absorption edge of La3+-doped samples at lower in low concentration (50 and 150Â ppm), show the shift of to high energy region (short wavelength), while with increasing of La3+ doping, the optical absorption edge shift fast to low energy region (long wavelength). Raman spectra have been investigated in a series of lead tungstate crystals doped with La3+ ions. The data were compared with the results in undoped PbWO4 and a (Mo, F)-doped sample. The dependence of frequency shift on doping was employed to deduce and approve the doping mechanism of rare-earth ions in PbWO4 lattice. The effects of La3+ doping on the photoluminescence spectra were also investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 121, Issues 1â2, 25 July 2005, Pages 103-107
Journal: Materials Science and Engineering: B - Volume 121, Issues 1â2, 25 July 2005, Pages 103-107
نویسندگان
Yanlin Huang, Hyo Jin Seo, Qiang Feng, Shouhua Yuan,