Near-infrared emission from MnO2-4 in various host lattices

✍ Scribed by Thomas C. Brunold; Hans U. Güdel

• Book ID: 103032735
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 250 KB
• Volume: 249
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)01362-8

✦ Synopsis

We have doped MnO42-into the host lattices K2MO 4 (M = S, Cr, Se), Cs2SO 4 and BaMO 4 (M = S, Cr, Se, Mo). Broadband spontaneous emission between 11000 and 7000 cm-] is observed in all crystals upon visible or near-infrared photoexcitation. The Mn 6÷ emission persists up to room temperature with an estimated quantum efficiency of 20% in BaSO4: Mn. A correlation is established between the temperature quenching behaviour and the size of the host ion M 6÷ for which Mn 6+ substitutes: the quenching increases with increasing radius of M 6+.