Cathodoluminescence and thermoluminescence of ZnB2O4:Eu3+ phosphors prepared via wet-chemical synthesis |
| |
Authors: | T Dogan L Tormo S Akca N Kucuk J Garcia Guinea Y Karabulut M Ayvacikli M Oglakci M Topaksu N Can |
| |
Affiliation: | 1. Department of Computer Technologies, Çukurova University, Vocational School of Imamoglu, 01700 Adana, Turkey;2. Museo Nacional Ciencias Naturales (MNCN-CSIC), Jose Gutierrez Abascal 2, Madrid 28006, Spain;3. Physics Department, Cukurova University, Arts-Sciences Faculty, 01330 Adana, Turkey;4. Department of Physics, Uludag University, Faculty of Arts and Sciences, Gorukle Campus, 16059 Bursa, Turkey;5. Department of Physics, Manisa Celal Bayar University, Faculty of Arts and Sciences, Muradiye-Manisa 45010, Turkey;6. Mechatronics Engineering, Hasan Ferdi Turgutlu Technology Faculty, Turgutlu-Manisa, Turkey;7. Physics Department, Jazan University, P.O. Box 114, 45142 Jazan, Saudi Arabia |
| |
Abstract: | In present work, a series of Eu doped zinc borate, ZnB2O4, phosphors prepared via wet chemical synthesis and their structural, surface morphology, cathodoluminescence (CL) and thermoluminescence (TL) properties have been studied. Phase purity and crystal structure of as-prepared samples are confirmed by X-ray diffraction measurements (XRD) and they were well consistent with PDF card No. 39-1126, indicating the formation of pure phase. The thermoluminescence (TL) behaviors of Eu activated ZnB2O4 host lattice are studied for various beta doses ranging from 0.1 to 10?Gy. The high-temperature peak of Eu activated sample located at 192?°C exhibited a linear dose response in the range of 0.1–10?Gy. Initial rise (IR) and peak shape (PS) methods were used to determine the activation energies of the trapping centres. The effects of the variable heating rate on TL behaviour of Eu activated ZnB2O4 were also studied. When excited using an electron beam induced light emission (i.e cathodoluminescence, CL) at room temperature (RT), the as-prepared phosphors generate reddish-orange color due to predominant emission peaks of Eu3+ ions located at 576–710?nm assigned to the 5D0→7FJ (J=1,2,3, and 4) transitions. The maximum CL intensity for Eu3+ ions at 614?nm with transition 5D0→7F2 was reached Eu3+ concentration of 5?mol%; quenching occurred at higher concentrations. Strong emission peak for Eu3+ ions at 614?nm with transition 5D0→7F2 is observed. The CL experimental data indicate that ZnB2O4:Eu3+ phosphor as an orange-red emitting phosphor may be promising luminescence materials for the optoelectronic applications. |
| |
Keywords: | Zinc borates Rare earth XRD Cathodoluminescence Thermoluminescence |
本文献已被 ScienceDirect 等数据库收录! |
|