کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7907567 | 1510758 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical characterization and Judd-Ofelt analysis of Pr3+ ions in sol-gel derived zirconia/polyethylene glycol composite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The photoluminescence characteristics of praseodymium (Pr3+) doped zirconia/polyethylene glycol (ZrO2/PEG) samples were studied using optical absorption and emission spectra. The optical properties were theoretically analysed using standard and modified Judd-Ofelt (J-O) models. The oscillator strength of the observed transitions and J-O intensity parameters were calculated using these J-O models. The radiative properties such as radiative transition probability (AT), branching ratio (βR), stimulated emission cross-section (Ïe) and gain band width (ÏeÃÎλeff) for the excited states of Pr3+ in ZrO2/PEG composite have been determined. The experimental branching ratios obtained from the emission spectra were compared with the theoretical values. The excitation spectra of Pr3+ doped samples show overlapping of Pr3+ excitation peak at 448 nm at the end of the broad excitation band of the host, indicating the charge transfer between the host and Pr3+ ions. Luminescence decay analysis confirmed concentration quenching in the prepared samples and the lifetime values are found to be in the microsecond range.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 76, February 2018, Pages 184-190
Journal: Optical Materials - Volume 76, February 2018, Pages 184-190
نویسندگان
Saritha K. Jose, Subash Gopi, Vinoy Thomas, E. Sreeja, Cyriac Joseph, N.V. Unnikrishnan, P.R. Biju,