Abstract

Dysprosium-doped orthorhombic yttrium aluminate (Dy:YAlO₃ or Dy:YAP) single crystals were grown by the Czochralski method with a size of Φ43 mm×150 mm. Based on the measurements of spectra and theoretical analysis, the white-light emission was investigated with different doping concentrations. The optimal white emission was achieved at Dy³⁺ doping concentration of 1.0% under 450 nm excitation. Combining with residual pumping light, the white-light output was successfully obtained with Commission Internationale de l´Eclairage (CIE) coordinates x=0.3797, y=0.3685, the color temperature of 4000 K, and the largest fluorescence quantum yield of 46.9%. With the development of the GaN laser diode, the Dy:YAP single crystal has proven applicable in white-light-emitting diodes.

© 2023 Chinese Laser Press

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