Tunable Luminescent Properties and Concentration-Dependent, Site-Preferable Distribution of Eu2+ Ions in Silicate Glass for White LEDs Applications

• DOI: 10.1021/acsami.5b02550
• Publication Date: 2015-04-21T14:31:37Z
• Authors: Xuejie Zhang; Jing Wang; Lin Huang; Fengjuan Pan; Yan Chen; Bingfu Lei; Mingying Peng; Mingmei Wu
• Keywords: Cyan; Photoluminescence excitation

The design of luminescent materials with widely and continuously tunable excitation emission is still a challenge in the field advanced optical applications. In this paper, we reported Eu(2+)-doped SiO2-Li2O-SrO-Al2O3-K2O-P2O5 (abbreviated as SLSAKP:Eu(2+)) silicate glass. Interestingly, it can give an intense from cyan (474 nm) to yellowish-green (538 simply by changing wavelength adjusting concentration Eu(2+) ions. absorption spectra, photoluminescence (PLE) (PL) decay curves reveal that there are rich distinguishable local cation sites SLSAKP glasses ions show preferable site distribution at different concentrations, which offer possibility engineer environment available for Luminescent based color white LED devices were successfully fabricated combining as-synthesized glass 385 nm n-UV or 450 blue chip, demonstrates potential application engineering solid-state lighting future.