Improving Thermal Stability of Cr3+Doped Calcium Niobium Gallium Garnet Through Zn2+Codoping
Near-infrared phosphor-converted light-emitting diodes(pc-LEDs)are characterized by their compact size and high efficiency,making them a promising solution for various applications in non-destructive testing and biological imaging.In this paper,we successfully synthesized Ca3Nb1.6875Ga3.1875O12:Cr3+phosphor through the high-temperature solid-state method.This phosphor displays broadband near-infrared emission ranging from 650 nm to 1 000 nm,with a peak wavelength of 770 nm when excited by 460 nm blue light.The crystal structure and spectral data of the material were systematically analyzed,and parameters such as the crystal field strength of Cr3+in CNGG matrix were calculated.The thermal stability of phosphorescence was significantly improved by introducing Zn2+,and the possible reasons were analyzed.The combination of CNGG:Cr3+with a blue light chip was encapsulated into a near-infrared pc-LED,leading to its successful application in the realm of biological tissue imaging.
near infrared phosphorbroadband emissionnear-infrared phosphor-convered light-emitting diodes(pc-LEDs)
国家科技期刊平台
NSTL
万方数据
