Dy~(3+)掺杂锗碲酸盐玻璃的绝对光谱参数与荧光量子产率

基于积分球配以CCD光谱测试系统,在紫色发光二极管激发下,对Dy3+掺杂锗碲酸盐(NZPGT)玻璃的荧光光谱进行表征,实现了以荧光发射特性绝对评价为目标的绝对光谱功率分布测定,进一步求得了辐射通量、光通量以及荧光量子产率等荧光特征参数。紫光LED激发下,总辐射通量和总光通量分别为1 172!W和0.034lm,其中Dy3+的4个可见特征发射峰的辐射通量为86!W,占总辐射通量的7.34%,其可见特征发射的总荧光量子产率为12.38%。结果表明,Dy3+掺杂NZPGT玻璃可被紫光有效激发,并且Dy3+的单一掺杂可实现高效率的黄白光发射。超过10%的荧光量子产率表明Dy3+掺杂NZPGT玻璃具有良好的实际应用前景,相关的绝对光谱参数也为进一步研发稀土掺杂固体发光材料提供有益的参考依据。

Absolute spectral parameters and fluorescence quantum yield in Dy~(3+) doped germanium tellurite glasses

Fluorescence spectra of Dy3+-doped germanium tellurite(NZPGT)glasses have been determined under the pumping of a violet light emitting diode(LED)using an integrating sphere connected to a CCD detector.The spectral power distribution of the sample under the violet LED excitation was derived from the measured spectra,and the radiant flux,luminous flux and quantum yield of the sample were obtained.The total radiant flux and total luminous flux were calculated to be 1 172μW and 0.034lm,respectively.The radiant flux for the four visible emission bands of Dy3+was derived to be 86 !W,which occupied 7.34% of the whole.The total quantum yield for the visible fluorescence of Dy3+was calculated to be 12.38%.The results suggested that the Dy3+-doped NZPGT glasses were efficiently excited by a violet LED and the single doping of Dy3+achieved efficient yellowish-white fluorescence.More than 10% of the fluorescence quantum yield indicates that the glasses have good application prospect,and the absolute spectral parameters provide a valuable reference for further development of rare-earth ions doped solid-state luminescent materials.