采用高温固相烧结法制备了KOH掺杂的CsBr:(Eu2+,KOH)粉体,通过对材料体系荧光光谱、光激励发光谱、拉曼光谱和光激励发光衰减时间等的系统研究,深入分析了KOH对CsBr∶Eu2+粉体光激励发光性能和抗辐照性能的影响.研究结果表明,掺杂引入的OH-离子增加了无辐射跃迁的几率,随着KOH浓度的增大,CsBr:(Eu2+,KOH)粉体的光激励发光衰减时间逐渐缩短.同时,由于K+和OH离子的共同作用,使材料中Eu离子周围空位浓度减少,避免了因Eu2+聚集而导致的浓度淬灭,使CsBr∶(Eu2+,KOH)粉体的抗辐照性能增强.
参考文献
| [1] | 徐叙珞,苏勉曾.发光学与发光材料.北京:化学工业出版社,2004:484-485. |
| [2] | Hesse S,Zimmermann J,von Seggern H,et al.CsEuBr3∶ crystal structure and its role in the photostimulation of CsBr:Eu2+.Journal of Applied Physics,2006,100(8):083506-1-5. |
| [3] | Zimmermann J,Hesse S,von Seggern H,et al.Radiation hardness of CsBr:Eu2+.Journal of Luminescence,2005,114(1):24-30. |
| [4] | Zimmermann J,Hesse S,von Seggem H,et al.Influence of Li-codoping on the radiation hardness of CsBr:Eu2+.Journal of Applied Physics,2007,101(11):113711-1-7. |
| [5] | Appleby G,Zimmermann J,Hesse S,et al.Sensitization and radiation hardening of the photostimulable X-ray storage phosphor CsBr:Eu2+.J Mater Sci.:Mater Electron.,2009,20(1):S54-S58. |
| [6] | Ehrenberg H,Fuess H,Hesse S,et al.Structures of CsEuBr3 and its degradation product Cs2EuBr510H2O.Acta Cystallographica Section B-Structural Science,2007,B63:201-204. |
| [7] | Hesse S,Zirnmermann J,von Seggem H,et al.The role of segregations and oxygen doping in the photostimulation mechanism of CsBr:Eu2+.Radiation Measurements,2007,42(4/5):638-643. |
| [8] | Zorenko Y,Turchak R.Effect of isoelectronic impurities K+ and Ion luminescence of CsBr:Eu2+ crystals.Journal of Applied Spectroscopy,2007,74(5):692-696. |
| [9] | Zorenko Y,Turchak R,Voznjak T.Energy transfer between the Eu2+ dipole and aggregate centers in CsBr:Eu crystals.Radiation Measurements,2007,42(4/5):672-674. |
| [10] | Zorenko Y,Turchak R,Voznjak T,et al.Time-resolved luminescence of Eu2+-aggregate centers in CsBr crystals.Physica Status Solidi (c),2005,2(1):535-538. |
| [11] | Zorenko Y,Turchak R,Voznyak T,et al.Luminescence of aggregate centers in CsBr:Eu2+ single crystals.Journal of Applied Spectroscopy,2006,73(3):406-410. |
| [12] | Zorenko Y,Turchak R,Gryk W,et al.Luminescent spectroscopy of Eu2+ centers in CsBr:Eu single crystals at 10-550 K.Journal of Luminescence,2004,106(3/4):313-320. |
| [13] | Meng Jia,Zhao Lili,Wu Jiehua,et al.The role of hydrogen-and hydroxyl-doping in CsBr:Eu2+.Journal of Luminescence,2009,129(8):850-853. |
| [14] | Meng Jia,Zhao Li-Li,Wu Jie-Hua,et al.Influence of annealing process on the photostimulated luminescence properties of CsBr:Eu2+.Journal of Inorganic Materials,2010,25(9):952-956. |
| [15] | Mai Shi-Qing,Shi Chun-Shan.Effect of crystal-field and bonding properties on spectral structure of Eu2+.Acta Chimica Sinica,1990,48:648-652. |
| [16] | Stevels A L N,Schrama-de Pauw A D M.Eu2+ luminescence in hexagonal aluminates containing large divalent or trivalent cations.J.Electrochem.Soc.,1976,123(5):691-697. |
| [17] | Riseberg L A,Moos H W.Multiphonon orbit-lattice relaxation of excited states of rare-Earth ions in crystals.Physical Review,1968,174(2):429-438. |
| [18] | 刘敏.稀土掺杂钇铝石榴石的制备与上转化发光.上海:中国科学院上海硅酸盐研究所博士论文.2007:108-109. |
| [19] | ZHAO Li-Juan,LU Shao-Zhe,SUN Ling-Dong,et al.Characteristics of Er3+ luminescent decay in oxy-fluoride glass ceramics.Journal of Optoelectronics Laser,2001,12(2):158-160. |
| [20] | Zaldo C,Calleja J M,Orozco E.Raman spectra of Eu2+ precipitates in KCl,KBr and KI single-crystals.Journal of Physics C:Solid State Physics,1987,20(6):849-859. |
| [21] | Bruce A D,Cowley R A.The two phonon Raman spectra of alkali-halide crystals.Journal of Physics C:Solid State Physics,1972,5(5):595-605. |
| [22] | 张光寅.晶格振动光谱学.北京:高等教育出版社,1991:334-336. |
| [23] | 余华.无机晶体中光存储色心的研究.天津:天津理工学院硕士学位论文.2002:40-44. |
| [24] | Pidol L,Kahn-Harari A,Viana B,et al.Scintillation properties of Lu2Si2O7 ∶ Ce3+,a fast and efficient scintillator crystal.Journal of Physics:Condensed Matter,2003,15(12):2091-2102. |
| [25] | Tanabe S,Yoshii S,Hirao K,et al.Upconversion properties,multiphonon relaxation,and local environment of rareearth ions in fluorophosphate glasses.Physical Review B,1992,45(9):4620-4625. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%