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

Citations Over TimeTop 1% of 2015 papers

Abstract

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

Related Papers

• → Ce3+ doped BaLu2Al2Ga2SiO12 — A novel blue-light excitable cyan-emitting phosphor with ultra-high quantum efficiency and excellent stability for full-spectrum white LEDs(2020)38 cited
• → Research progress in cyan and blue phosphors(2022)13 cited
• → Red Readers, Silver, High-Magenta, and Cyan Analog Sound Tracks—Review and Status(1998)1 cited
• LED 조명색상이 정서자극의 평정과 재인에 미치는 효과(2011)
• Formation of Cyan Leuco-dye in Color Photographic Materials Processing and Methods of its Prevention(2007)