Luminescence properties of CaF2:Mn optically transparent ceramic

• Published in: Journal of luminescence Vol. 166; pp. 222 - 226
• Main Authors: Singh, S.G., Sen, Shashwati, Patra, G.D., Gadkari, S.C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-10-2015
• Subjects: Dosimeter; Hot pressing; Low temperature; Luminescence; Transparent ceramics; Dosimeter; Hot pressing; Transparent ceramics; Luminescence; Low temperature
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2015.05.014

The optically transparent ceramics (OTCs) of CaF2:Mn were fabricated by a vacuum hot-press method. Photo-luminescence (PL) and radio-luminescence measurements were carried out on CaF2:Mn OTCs to study the effect of processing on the luminescence properties of the material. The temperature dependence of PL and decay kinetics was investigated down to 77K. The results were compared with the reported luminescence properties of CaF2:Mn single crystals. The comparison shows that the luminescence is similar at room temperature; however, the evolution of luminescence with temperature and decay mechanism of Mn2+ centers in OTCs is quite different. A possible explanation for the differences in the luminescence properties of CaF2:Mn OTC has been proposed.
•Photo-luminescence studies on CaF2:Mn OTCs.•Temperature dependence of luminescence properties of Mn2+ centers in the CaF2:Mn OTCs.•Luminescence intensity was found to increase with increasing temperature.•Two decay components observed in the photo-luminescence of CaF2:Mn OTCs.