Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb3+, Er3+ powders

摘要

YOF: Yb3+, Er3+ powders with rhombohedral phase were successfully synthesized by using a modified sol-gel method with calcinating under a temperature range between 400 degrees C and 600 degrees C. A systematic study on the temperature-dependent morphology and spectroscopic properties of rhombohedral YOF: Yb3+, Er3+ powders have been performed. The YOF: Yb3+, Er3+ powders that prepared at 400 degrees C and 500 degrees C exhibit a plate growth habit, while the powder that prepared at 600 degrees C shows a sintering property. When excited by 980 nm laser beam, all of the rhombohedral YOF: Yb3+, Er3+ powders show efficient red light emission with light wavelength ranging from 630 nm to 700 nm. The upconversion mechanism and luminescence decay properties were discussed in detail.