A novel white-light-emission phosphor Dy3+-doped CaLaB7O13 under UV excitation

作者：Xiong, F. B.^*; Liu, S. X.; Lin, H. F.; Meng, X. G.; Lian, S. Y.; Zhu, W. Z.

来源：Optics and Laser Technology, 2018, 106: 29-33.

DOI：10.1016/j.optlastec.2018.03.023

• Optical materials
• Chemical synthesis
• Luminescence
• Optical properties
• Phosphors

White-light-emitting phosphors Dy3+-doped CaLaB7O13 were synthesized by solid-state reaction, and their luminescent properties were characterized for the applications in white-light-diodes (W-LEDs). The obtained samples were initially investigated by X-ray powder diffraction, photoluminescence excitation and emission spectra, the Commission International de L'Eclairage (CIE) chromaticity coordinates, and thermally stable properties. Dy3+-doped CaLaB7O13 phosphors emitted a blue emission band centered at 480 nm and a yellow one centered at 575 nm with CIE chromaticity coordinates of (0.325, 0.339) under the excitation of near-UV (NUV) LED chips at 365 nm. The electric dipole-dipole interaction was demonstrated to be the energy transfer mechanism in Dy3+-doped CaLaB7O13 phosphors, and the critical distance of energy transfer between the Dy3+ ions was estimated to be about 0.920 nm. The temperature-dependent spectra imply Dy3+-doped CaLaB7O13 show small thermal quenching. The present work indicated that Dy3+-doped CaLaB(7)O(13)3 was a promising white-light-emitting phosphor excited by NUV LED.

• 出版日期2018-10
• 单位厦门理工学院