Multicolour thin film electroluminescent displays: a new application of rare earth metals

Orange Electroluminescence from a Divalent Europium Complex

“…They were then in-situ N-acetylated at 150 C, [9] before being finally reacted with 20a and b to give dye 7 in a 50 % yield, and dyes 8a and b in an overall yield of 15 %. [10] For comparison, the known chromophores 1 and 2, and the NLO standard, DANS (12), are included in this study. The change Dn to the refractive index n induced by a static electric field E 0 in a NLO material may arise from the first-order electrooptical (EO1) effect due to the Pockels susceptibility w (2) (±o;o,0) and/or the second-order electrooptical (EO2) effect due to the Kerr susceptibility w (3) (±o;o,0,0).…”

“…Lanthanide-based materials are gaining popularity as phosphors for thin film devices, as they offer several potential advantages over other light emitting species; such as narrow emission linewidths and excellent Commission Internationale de lEclairage (CIE) colormap coordinates. To date, two distinct types of lanthanide metal-based phosphors have been reported in the literature; those based upon solid-state inorganic matrices doped with small amounts of the lanthanide ion [11,12] and molecular coordination complexes.…”

Unexpected Synthetic Routes to Lanthanide Chalcogenido Clusters: Sm8Se6(SePh)12(THF)8 and [Sm7S7(SePh)6(DME)7]+

“…While Ln clusters of the heavier chalcogens (Se, Te 4 ) are rare, the corresponding sulfido clusters are unknown. Such clusters are particularly interesting as models for Ln ions doped into sulfide-based semiconductors and fiber optic materials we found reference to thermochemical bond strengths that implied S would insert into Ln−Se bonds, which we thought could then lead to the preparation of chalcogen-rich reagents for subsequent cluster syntheses.…”

Red light emission by photoluminescence and electroluminescence from Pr-doped GaN on Si substrates

“…By introduction of Pr 3ϩ for red, Er 3ϩ for green, and another RE for blue, a full-color display can be fabricated from a single substrate. Based on currently known properties 6 of REs, we suggest Tm 3ϩ or Ce 3ϩ could produce the desired blue emission.…”