Abstract
Ho3+/Yb3+ co-doped Bi2WO6 (Ho3+/Yb3+-Bi2WO6) nanopowders were synthesized by a simple hydrothermal method. Crystal structure, morphology and chemical composition of the samples were characterized by XRD, SEM, TEM and EDS. The effects of some critical synthesis conditions on the upconversion luminescence properties were studied in detail. Under the excitation of 980nm laser diode, Ho3+/Yb3+-Bi2WO6 upconversion nanopowder with strongest luminescence intensity was obtained when the concentration of Ho3+ and Yb3+ were 1mol%, 5.0mol% respectively, and calcined at 600°C. Moreover, excitation power studies showed that a two-photon process was involved in the upconversion emissions. The probable upconversion luminescence mechanism was discussed according to the energy transfer process.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
