Research of Fluorescent Properties of a New Type of Phosphor with Mn2+-Doped Ca2SiO4

• Published in: Sensors (Basel, Switzerland) Vol. 21; no. 8; p. 2788
• Main Authors: Fan, Xiaozhou, Zhang, Wenqi, Lü, Fangcheng, Sui, Yueyi, Wang, Jiaxue, Xu, Ziqiang
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 15.04.2021; MDPI
• Subjects: Agricultural production; Communication; Crystal lattices; fluorescence intensity; fluorescent optical fiber; lifetime; Optical properties; Radiation; Sensors; temperature sensor
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s21082788

Fluorescent optical fiber temperature sensors have attracted extensive attention due to their strong anti-electromagnetic interference ability, good high-voltage insulation performance, and fast response speed. The fluorescent material of the sensor probe directly determines the temperature measurement effect. In this paper, a new type of fluorescent material with a Mn2+-doped Ca2SiO4 phosphor (CSO:Mn2+) is synthesized via the solid-state reaction method at 1450 °C. The X-ray diffraction spectrum shows that the sintered sample has a pure phase structure, although the diffraction peaks show a slight shift when dopants are added. The temperature dependence of the fluorescence intensity and lifetime in the range from 290 to 450 K is explored with the help of a fluorescence spectrometer. Green emission bands peaking at 475 and 550 nm from Mn2+ are observed in the fluorescence spectra, and the intensity of emitted light decreases as the temperature rises. The average lifetime of CSO:Mn2+ is 17 ms, which is much higher than the commonly used fluorescent materials on the market. The fluorescence lifetime decreases with increasing temperature and shows a good linear relationship within a certain temperature range. The research results are of great significance to the development of a new generation of fluorescence sensors.