Upconversion Luminescence of Ho3+–Tm3+ Codoped Chalcohalide Glasses and the Relevant Energy Transfer Mechanism
Abstract:Ho3+–Tm3+-codoped GeS2–Ga2S3–CsCl chalcohalide glasses are prepared and their upconversion (UC) show that the green UC luminescence from Ho3+ ions under an 808 nm diode laser excitation is considerably enhanced by Tm3+ ions codoping while the red UC luminescence from Tm3+ ions is weakened. The relevant mechanism is analyzed with respect to the energy transfer mechanism from Tm3+ ions to Ho3+ ions due to some energy levels of the Ho3+ ions is close to that of the Tm3+ ions.
Document Type: Research Article
Affiliations: 1: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China 2: Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Publication date: September 1, 2010