
High-Brightness LaPO4:Ce3+, Tb3+ Nanophosphors: Reductive Hydrothermal Synthesis and Photoluminescent Properties
This paper definitely reveals that LaPO4:Ce3+, Tb3+ (LAP) nanophosphors prepared by normal hydrothermal method suffer significant loss of luminescence due to the oxidation of Ce3+–Ce4+ at hydrothermal stage. To effectively protect Ce3+ from oxidation, a reductive hydrothermal process using hydrazine hydrate as a protecting agent is proposed to synthesize LAP nanophosphors with different Ce3+ and Tb3+ concentrations, which exhibited much stronger green photoluminescence (PL) and longer lifetime than the products prepared by normal hydrothermal method. Furthermore, the high-brightness LAP nanophosphors exhibited high-quenching concentration of Tb3+; the La0.4Ce0.4Tb0.2PO4 nanophosphor showed almost the same PL intensity as that of the commercially used La0.7Ce0.2Tb0.1PO4 bulk powder.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics
Document Type: Research Article
Affiliations: Center of Materials Engineering, Zhejiang Sci-Tech University, Xiasha University Town, Hangzhou 310018, China
Publication date: May 1, 2008