Synthesis of CaWO₄:(Eu³⁺,Tb³⁺) Thin Films by a Two-Step Method at Room Temperature

Abstract:

It is hardly possible to obtain rare earth doped CaWO₄ thin films directly through electrochemical techniques. A two-step method has been proposed to synthesize CaWO₄:(Eu³⁺,Tb³⁺) thin films at room temperature. X-ray diffraction, energy dispersive X-ray analysis, spectrophotometer were used to characterize their phase, composition and luminescent properties. Results reveal that (Eu³⁺,Tb³⁺)-doped CaWO₄ films have a tetragonal phase. When the ratio of n (Eu)/n (Tb) in the solution is up to 3:1, CaWO₄:(Eu³⁺,Tb³⁺) thin film will be enriched with Tb element; on the contrary, when the ratio in the solution is lower than 1:4, CaWO₄:(Eu³⁺,Tb³⁺) thin film will be enriched with Eu element. Under the excitation of 242 nm, sharp emission peaks at 612, 543, 489 and 589 nm have been observed for CaWO₄:(Eu³⁺,Tb³⁺) thin films.

• Periodical: Advanced Materials Research (Volume 710)
• Pages: 170-173
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.710.170
• Online since: June 2013
• Authors: Lian Ping Chen, Yuan Hong Gao
• Keywords: CaWo₄, Electrochemical, Eu³⁺, Tb³⁺, Thin Film

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