Luminescence of the SrCl₂:Pr crystals under high-energy excitation

详细信息    查看全文

• 作者：O.T. Antonyak ; A.S. Voloshinovskii ; V.V. Vistovskyy ; G.B. Stryganyuk ; O.P. Kregel
• 关键词：SrCl2 ; Pr single crystal ; Synchrotron radiation ; Luminescence excitation and emission spectra ; X-ray excited luminescence spectra ; f&ndash ; f and d&ndash ; f transitions
• 刊名：Journal of Luminescence
• 出版年：January, 2014
• 年：2014
• 卷：145
• 期：Complete
• 页码：13-18
• 全文大小：1165 K

文摘

The present research was carried out in order to elucidate the mechanisms of energy transfer from the crystal lattice to Pr³⁺ ions in SrCl₂. The luminescence excitation and emission spectra as well as luminescence kinetics of the SrCl₂:Pr single crystals containing 0.2 mol% Pr were investigated at 300 and 10 K using the vacuum ultraviolet (VUV) synchrotron radiation. The X-ray excited luminescence spectra of the SrCl₂:Pr (C_Pr=0.2 and 0.5 mol%) and SrCl₂:Pr, K (C_Pr=1.5 mol%; C_K=1.5 mol%) crystals were studied at 294 and 80 K. Under optical excitation of the samples in the Pr³⁺ absorption bands, there were observed five fast ultraviolet emissions assigned to the 4f¹5d鈫?f² transitions, and two long-wave bands corresponding to the f-f transitions. Furthermore, the intrinsic emission bands of SrCl₂ were observed at 10 K. The X-ray excited luminescence spectrum of the SrCl₂:Pr crystal containing 0.2 mol% Pr, besides intrinsic emission band near 400 nm, has got a long-wave band at about 490 nm of the Pr³⁺ centers. There were not observed any emission bands of the Pr³⁺ centers corresponding to the 4f¹5d-4f² transitions in the X-ray excited luminescence spectrum of the SrCl₂:Pr crystal. The possible mechanisms of energy transfer from the SrCl₂ matrix to the Pr³⁺ centers are discussed.