High-Purity and Narrow-Band Red Fluorescence in Er3+/Yb3+ Co-Doped Bi2o3 Nano-Powder

Abstract

Up-conversion emissions located at low-absorption window(650-950nm) of biological tissue is worthy of research for fluorescent probes, which was expected to have a high penetration depth. Our Bi2O3 nano-powders doped with Er3+ and Yb3+ ions can emit strong red up-conversion emission (peak at ~678nm) under 980nm excitation. And the color-purity (C-P) and full width half maximum (H-W) of the emission are ~0.99 and 31nm for sample Bi4 at lower pumping power (373mW), which can bring a high signal-noise-ratio. This study is greatly helpful in exploring fluorescent materials for internal tissue imaging.

Keywords: Optical materials and properties, Luminescence, Nanoparticles