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制备了一种CdSe/ZnS量子点掺杂光纤,测量了不同掺杂浓度和光纤长度下的量子点光致荧光光谱,得到了荧光峰值波长的红移随量子点光纤掺杂浓度和光纤长度的变化。观测对比了4种不同纤芯本底材料(UV胶、甲苯、正己烷和正癸烷)随光纤长度增加的红移,发现在不同的本底材料中,红移随光纤长度的增加的速率不同。在不同本底材料和不同的掺杂浓度下,最大红移均趋向于20nm的同一饱和值,该饱和值取决于量子点第一吸收峰的半峰全宽。
A CdSe / ZnS quantum dot doped fiber was prepared. The fluorescence spectra of the quantum dots at different doping concentrations and fiber lengths were measured. The red shift of the fluorescence peak wavelength was obtained with the doping concentration and fiber length Variety. The redshifts of four different core background materials (UV glue, toluene, n-hexane and n-decane) with increasing fiber length were observed and compared, and the rate of red shift with fiber length increase was found to be different for different background materials . Under different background materials and different doping concentrations, the maximum redshift tends to the same saturation value of 20 nm, which depends on the full width at half maximum of the first absorption peak of the quantum dot.