White light generation through the zinc metaphosphate glass activated by Ce3+, Tb3+ and Mn2+ ions

Blue-yellow photoluminescence from Ce3+→Dy3+ energy transfer in HfO2:Ce3+:Dy3+ films deposited by ultrasonic spray pyrolysis

“…In this technique, raw materials are mixed in a solvent, and then sprayed on a heated surface, where the constituents react to form a chemical compound. The detailed preparation of the spray solution is described elsewhere [10,13]. HfO2:Ce 3+ , HfO2:Dy 3+ and HfO2:Ce 3+ :Dy 3+ films were deposited onto Corning 7059 glass slides used as substrates.…”

“…Ce 3+ ions exhibit broad absorption bands in the UV, so that they can be easily excited by AlGaN/GaN-based LEDs [4]. The intense broad absorption band of Ce 3+ ions is a consequence of their 4f → 5d parity allowed electric dipole transitions, so that in co-doped materials such ions act as good sensitizers, transferring a part of their excitation energy to activator ions such as Tb 3+ [4,[9][10][11], Mn 2+ [10][11][12][13][14][15] and Dy 3+ [5][6][7][8]11].…”

Luminescence and energy transfer of Mn2+ and Tb3+ in Y3Al5O12 phosphors

“…The first is the near-UV and blue emission below 480 nm, including several peaks at 385, 419 and 439 nm, ascribed to the 5 D 3 -7 F J (J = 6, 5, 4) transitions. The second is the green and red emission above 480 nm, including several peaks at 492, 544, 593 and 629 nm, corresponding to 5 D 4 -7 F J (J = 6,5,4,3) transitions [17,18,27,28]. (For interpretation of the references to color in this text, the reader is referred to the web version of the article.)…”

Comparative study of zinc addition effect on thermal properties of silicate and phosphate glasses

“…Zinc phosphate glasses have been developed for use as LED light sources [1,2] and as substrates for optical waveguides written by f-sec lasers [3][4][5][6]. Zinc phosphate glasses also tend to have greater coefficients of thermal expansion with low processing temperatures, which makes them useful as sealing glasses [7,8].…”