【摘要】 实验采用高温熔融法制备了一系列Dy3+离子、Tb3+离子单掺或共掺氟氧碲酸盐玻璃样品.测试了不同摩尔含量的Dy3+离子和Tb3+离子的氟氧碲酸盐玻璃样品的密度,分析了紫外-可见透射光谱、激发光谱、发射光谱、发光衰减曲线,研究了不同摩尔含量的Dy3+离子和Tb3+离子的氟氧碲酸盐玻璃样品光谱性能及Dy3+离子到Tb3+离子能量传递机理.结果表明:Dy3+离子、Tb3+离子单掺或共掺氟氧碲酸盐玻璃样品的密度均大于5g·cm-3,最大可达6.09g·cm-3;Dy3+离子可以敏化Tb3+离子,促进其发光,但当Dy3+离子超过一定浓度后,会发生离子间浓度猝灭效应,Tb3+离子的发光反而降低.试验测得,Dy3+离子的最佳掺杂浓度为1.0mol%,此时,Tb3+离子掺杂浓度为6.0mol%,Tb3+离子发光效果最强.依据Dexter能量传输理论,并对Dy3+离子和Tb3+离子的能级图及能级间的跃迁进行分析,可知Dy3+离子和Tb3+离子间的能量传递方式为非辐射共振传递.更多还原

【Abstract】 The oxyfluoride tellurite glasses doped with Dy3+ions,Tb3+ions respectively and co-doped with Dy3+ions and Tb3+ions were synthesized by high-temperature melting method.Densities of different molar concentrations of Dy3+ions and Tb3+ions were measured.Transmission spectra,excitation spectra,emission spectra and decay time were investigated.And the energy transfer between Dy3+ions and Tb3+ions were studied.The results showe that all the glass samples have a high density with more than 5g·cm-3,and up to 6.09g·cm-3.Dy3+ions can effectively sensitize the luminescence of Tb3+ions,when molar concentrations of Dy3+ions is more than a certain concentration,the emission intensity of Tb3+ions will be decreased because of the concentration quenching effect.With 1mol% Dy3+ions,the emission intensity of Tb3+ions show higher for 6mol% Tb3+ions-doped oxyfluoride tellurite glasses.Based on Dexter theory,it is showed that the energy transfer between Dy3+ions and Tb3+ions was nonradiation energy transfer by analyzing the analyzingenergy level diagram and energy transfer from Dy3+ions to Tb3+ions.更多还原