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本文通过建立不同浓度五磷酸盐非晶材料(ErxLa1-xP5O14)动力学过程的速率方程,特别是引入了改进系数exp{hc k/kT}以区别能量传递Stokes过程和反Stokes过程,分别对Er0.01La0.99P5O14,Er0.1La
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关键词:
- 反Stokes能量传递改进系数 /
- 动力学过程 /
- 五磷酸盐非晶 /
- 红外量子剪裁
Since the visible quantum cutting in Eu3+–Gd3+ material was reported, the importance, the application, and the significance of the quantum cutting phenomenon have been widely recognized.The rate equations which describe the luminescence dynamic processes for different concentrations of (ErxLa1-xP5O14) noncrystal are established in this paper. The coefficients exp{hc k/kT} is introduced in to the calculation of anti-Stokes energy transfer rate to distinguish Stokes energy transfer.All dynamic processes have been simulated separately with and without considering this coefficient for the energy transfer rate of Er0.01La0.99P5O14,Er0.1La0.9P5O14 and ErP5O14 noncrystals when their 2H11/2 ,4I9/2 and4I11/2 levels are excited.The results show that it is essential to take the coefficient into calculation particularly for ErP5O14 noncrystal where energy transfer plays a key role.There is no influence though the distance between rare earth ions is larger.And it is found that infrared quantum cutting exsists in ErP5O14 noncrystal excited by visible light. The relative nonradiative relaxation rate, the spontaneous emission rate and the energy transfer rate are calculated particularly , The relative energy transfer dynamics is analyzed.It is found that the {4H11/2→4I9/2,4I15/2→4I13/2} energy transfer with a rate of 239500s-1, is the main reason for 2H11/2 energy level to have the infrared quantum cutting, Which is meaningful for finding high-efficiency solar cell materials.-
Keywords:
- the improved coefficient of anti-Stokes energy transfer rate /
- dynamic process /
- pentaphosphate noncrystal /
- infrared quantum cutting
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[2] Henderson B, Imbusch G F 1989 Optical Spectroscopy of Inorgannic Solids (Oxford:Clarendon Press)
[3] Carnell W T, Fields P R , Wybourne B G 1965 J.Chem.Phys.42 3797
[4] Miyakawa T,Dexter D L 1970 Phys. Rev. B 1 2961
[5] Kushidab T 1973 J. Phys. Soc. Jpn. 34 1318
[6] Soules T F,Duke C B 1971 Phys. Rev.B 3 262
[7] Bron W E, Wagner M 1965 Phys. Rev. 139 233
[8] Sturge M D 1973 Phys. Rev. B 8 6
[9] Auzel F 1976 Phys. Rev. B 13 2809
[10] Silva C J, Gouveia E A 2000 Appl.Phys. B 70 185
[11] Wang C,Chen X B, Gregory J S, Naruhito S 2010 Commun. Comput. Phys. 7 580
[12] Reisfeld R 1977 Lasers and Excited States of Rare-Earth ( New York: Springer-Verlag)
[13] Chen X B,Wang C, Gregory J S, Naruhito S 2009 Chin. Phys. B 18 5523
[14] Chen X B,Liao H B 2010 Acta Phys. Sin. 59 5091( in Chinese)[陈晓波、廖红波 2010 59 5091]
[15] Chen X B,Wu J G 2009 Opt. Lett. 34 887
[1] Auzel F 2004 Chem. Rev.104 139
[2] Henderson B, Imbusch G F 1989 Optical Spectroscopy of Inorgannic Solids (Oxford:Clarendon Press)
[3] Carnell W T, Fields P R , Wybourne B G 1965 J.Chem.Phys.42 3797
[4] Miyakawa T,Dexter D L 1970 Phys. Rev. B 1 2961
[5] Kushidab T 1973 J. Phys. Soc. Jpn. 34 1318
[6] Soules T F,Duke C B 1971 Phys. Rev.B 3 262
[7] Bron W E, Wagner M 1965 Phys. Rev. 139 233
[8] Sturge M D 1973 Phys. Rev. B 8 6
[9] Auzel F 1976 Phys. Rev. B 13 2809
[10] Silva C J, Gouveia E A 2000 Appl.Phys. B 70 185
[11] Wang C,Chen X B, Gregory J S, Naruhito S 2010 Commun. Comput. Phys. 7 580
[12] Reisfeld R 1977 Lasers and Excited States of Rare-Earth ( New York: Springer-Verlag)
[13] Chen X B,Wang C, Gregory J S, Naruhito S 2009 Chin. Phys. B 18 5523
[14] Chen X B,Liao H B 2010 Acta Phys. Sin. 59 5091( in Chinese)[陈晓波、廖红波 2010 59 5091]
[15] Chen X B,Wu J G 2009 Opt. Lett. 34 887
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