提出利用气炼法制备 Yb2+／ Yb3+共掺石英玻璃,通过增加辅助加热装置来控制 Yb3+和 Yb2+离子间的转化过程,并对不同条件下制备的 Yb2+／ Yb3+共掺石英玻璃的吸收特性和发射特性进行了研究。由于 Yb2+离子的4f14→4f135d 能级跃迁,经过辅助加热制备的 Yb2+／ Yb3+共掺石英玻璃有着更强的吸收强度和更多的吸收峰,并且其吸收光谱的尾部向更长波长延伸,同时也可观察到 Yb3+离子典型的吸收特性。经过辅助加热制备的 Yb2+／ Yb3+共掺石英玻璃的主发射峰位于530 nm 左右,经色作标换算得到所制备玻璃的色坐标为(0.3322,0.4767),落在白光区域。研究结果表明,所制备的 Yb2+／ Yb3+共掺石英玻璃是一种白光 LED 的潜在材料。%The flame fusion process was put forward to prepare the Yb2 + / Yb3 + co-doped silica glass, and the conversion process between Yb3 + and Yb2 + ions was controlled by increasing the auxiliary heating device. The absorption and emission characteristics of the Yb2 + / Yb3 + co-doped silica glass prepared with different conditions were studied. Because of 4f14→4f135d1 energy transition of Yb2 +ions, Yb2 + / Yb3 + co-doped silica glass prepared with auxiliary heating has stronger absorption inten-sity and more absorption peak, and the tail of the absorption spectrum extends to the longer wave-length. At the same time, the typical absorption characteristics of Yb3 + ions can also be observed. The emission peak of Yb2 + / Yb3 + co-doped silica glass prepared with auxiliary heating locates around 530 nm. The CIE coordinate (0. 332 2, 0. 476 7) of Yb2 + / Yb3 + co-doped silica glass lies within the band of white-light illumination. The results indicate that Yb2 + / Yb3 + co-doped silica glass can act as suitable material for white phosphors.
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