Growth, luminescence and energy transfer studies of Pr3+, Yb3+ co-doped CaYAlO4 single crystal

• Published in: Physica. B, Condensed matter Vol. 408; pp. 1 - 5
• Main Authors: Di, Juqing, Xu, Xiaodong, Xia, Changtai, Li, Dongzhen, Zhou, Dahua, Sai, Qinglin, Wang, Lulu, Xu, Jun
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.01.2013; Elsevier
• Subjects: Condensed matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystal growth; Crystals; Decay; Emission analysis; Energy transfer; Exact sciences and technology; Fluorescence; Luminescence; Optical materials; Optical properties; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Photoluminescence; Physics; Single crystals; Crystal growth; Optical materials; Energy transfer; Optical properties; Fluorescence; Czochralski method; Quantum cutting; Luminescence decay; Near infrared radiation; Monocrystals; Ytterbium additions; Calcium Yttrium Aluminates Mixed; Praseodymium additions; Codoping; Crystal growth from melts
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2012.09.032

Pr3+, Yb3+ co-doped CaYAlO4 (Pr, Yb: CYA) single crystal was grown using the Czochralski (CZ) method. For near-infrared quantum-cutting system, a quantum efficiency of 145% for Pr3+, Yb3+-codoped CYA crystal has been obtained by ignoring the nonradiative losses. Under excitation at 940nm, high intensities of 502nm, 555nm, 628nm, 661nm and 729nm emissions turn up. Fluorescence decay time of 3P0→3F2 emission of Pr3+ ions and 2F5/2→2F7/2 transition of Yb3+ ions were also studied as evidences for energy transfer.