Tuning the emission colour in mixed lanthanide microporous silicates: energy transfer, composition and chromaticity

Abstract

The Ln-AV-20 structure is able to incorporate several different Ln 3+ ions, which emit in different spectral regions, enabling the possibility of multi-colour capability. Using a study of the energy transfer dynamics in Gd 1À(a+b) Tb a Eu b -AV-20 materials, we show that the emission chromaticity of these systems may be fine-tuned in the red-green spectral region simply by changing the excitation wavelength and/or the sample composition. We show that a study of the energy transfer kinetics, in these and in related materials, can provide useful insight when the design of a material with a specific emission profile is required. By replacing Gd 3+ with Ce 3+ , a system with full-colour capability, Ce 0.53 Tb 0.35 Eu 0.12 -AV-20, has been prepared. The emission colour coordinates for this material at room-temperature are x,y ¼ 0.34, 0.33, which is in good agreement with the values given by the CIE for a white standard.

Cs+ ion exchange over lanthanide silicate Eu-AV-20: Experimental measurement and modelling

“…4 [46]. The structure of AV-20 is amenable to the incorporation of a second type of Ln 3+ cation [48].…”

“…Recently, much attention was given to AV (acronym of Aveiro) materials because they combine in a single and stable solid microporosity and tuneable optical properties [48]. This makes them potential materials for applications in devices such as cathode ray tubes, projection televisions, fluorescent tubes and X-ray detectors, photonics and optical communication, and may also play an important role in the development of sensors for future use in wastewater control.…”

“…The Tobermorite family of materials has already been applied as cation exchangers [47]. Until now only two papers concerning Ln-AV-20 were published, namely focusing the energy transfer and the emission decay kinetic of mixed Ln-AV-20 silicates [48,49].…”

Homogeneous one-dimensional structured Tb(OH)3:Eu3+ nanorods: Hydrothermal synthesis, energy transfer, and tunable luminescence properties

“…Inorganic phosphor materials based on rare earth (RE) compounds and RE ions doped compounds have been widely used in modern lighting and display fields, such as fluorescent lamps, cathode-ray tubes, field emission displays, and plasma display panels because of their abundant emission colors resulting from the 4f electronic shells [1][2][3][4][5]. Recently, the request for light-emitting-diode (LED) converted phosphors has triggered active research efforts in the investigation of single-phased lightemitting phosphors via chemical approaches [6].…”

Synthesis and luminescence properties of a novel Eu3+, Tb3+ co-doped Al18B4O33 whiskers by a gel nano-coating method

“…Rare-earth-activated inorganic phosphor materials have been widely used in modern lighting and display fields, such as fluorescent lamps, cathode-ray tubes, field emission displays for their well-defined transitions within the 4f electronic shells [1][2][3][4][5]. As the most frequently used activator ions in luminescent materials, the Eu 3? and Tb 3? are excellent activator which mainly show emissions due to transitions of 5 D 0 to 7 F J (J = 1, 2, 3, 4) in the red region and 5 D 4 to 7 F J (J = 6, 5, 4, 3) in the green region, respectively [6,7].…”