【作者】 卢本强； 刘启明； 侯亚男； 赵修建；

【Author】 Lu Benqiang~1 Lu Qiming~(*,1) Hou Yanan~1 Zhao Xiujian~1 (1 Key Laboratory of Silicate Materials Science and Engineering,Minister of Education, Wuhan University of Technology,Hu Bei 430070,China)

【机构】 武汉理工大学；

【摘要】 本文一方面研究了0.05mol%Dy³⁺掺杂的GeS₂-Ga₂S₃-CsI硫卤玻璃的中红外发光特性。结果表明CsI引入到GeS₂-Ga₂S₃硫系玻璃中有效降低了体系的析晶能力,所有多重态的吸收截面均不同程度减小,峰位产生蓝移;荧光寿命测试表明,随着CsI的引入,基质玻璃的离子键性增强且折射率下降,从而导致辐射跃迁速率下降。Dy³⁺掺杂GeS₂-Ga₂S₃-CsI硫卤玻璃在2.7μm(⁶H_13/2→⁶H_15/2)附近产生形状为多个峰组合成的较宽的发射带。另一方面依据Dy³⁺掺杂的GeS₂-Ga₂S₃（CsI）玻璃的吸收截面作了Judd-Ofelt理论相关参数的计算,发现离子键性CsI的引入使得稀土离子周围配位环境的共价性减弱,离子性增强,导致Dy³⁺掺杂下GeS₂-Ga₂S₃-CsI玻璃的多重态振子强度较GeS₂-Ga₂S₃玻璃的要小。GeS₂-Ga₂S₃玻璃中加入CsI后,多声子驰豫率（MPR）随之降低,中红外荧光发光的量子效率则随之提高。更多还原

【Abstract】 In this paper,the luminescence of 0.05mol%Dy³⁺-doped GeS₂-Ga₂S₃-CsI was investigated.The result showed that the ability of crystallization decreased with the addition of CsI to GeS₂-Ga₂S₃ chalcogenide glasses,the intensities of absorption cross section of all multiplets also decreased with a blue-shift.And the luminescent lifetime demonstrated that the ionicity and refraction index of the based glass decreased,which reduced the radiative transition rate.The emission spectra shape of Dy³⁺-doped GeS₂-Ga₂S₃-CsI chalcohalide glasses were wide emission band combined by several peaks rounding 2.7μm(⁶H_13/2→⁶H_15/2).Bysides,the parameters of Judd-Ofelt theory for the absorption cross section of Dy³⁺-doped GeS₂-Ga₂S₃（CsI） glass were calculated.And the results showed that the reduction of covalent bond strength and the inhancement of ionic bond strength around the rare-earth ion after CsI’s addition to the glasses made the oscillator strengths of the excited manifolds smaller in Dy³⁺-doped GeS₂-Ga₂S₃-CsI glasses than those in Dy³⁺-doped GeS₂-Ga₂S₃ glasses.The addition of CsI resulted in the reduction of the multiphonon relaxation rate（MPR） as well as the enhancement in quantum efficiencies of the mid-infrared fluorescence.更多还原