Dutzler Daniel, Seibald Markus, Baumann Dominik, Huppertz Hubert
Institut für Allgemeine, Anorganische und Theoretische Chemie, Universität Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria.
OSRAM Opto Semiconductors GmbH, Mittelstetter Weg 2, 86830, Schwabmünchen, Germany.
Angew Chem Int Ed Engl. 2018 Oct 8;57(41):13676-13680. doi: 10.1002/anie.201808332. Epub 2018 Sep 21.
A hitherto unknown synthetic access to alkali lithosilicates, a substance class first described by Hoppe in the 1980s, is reported. With the synthesis and characterization of NaK [Li SiO ] , a new representative has been discovered, expanding the family of known alkali lithosilicates. Astonishingly, NaK [Li SiO ] and the already established alkali lithosilicates Na[Li SiO ] as well as K[Li SiO ] display unforeseen luminescence properties, when doped with Eu . Na[Li SiO ]:Eu exhibits an ultra-narrow blue, K[Li SiO ]:Eu a broadband, and NaK [Li SiO ] :Eu a yellow-green double emission upon excitation with near-UV to blue light. Consequently, all of the investigated substances of this class of compounds are highly interesting phosphors for application in phosphor converted LEDs.
报道了一种迄今未知的合成碱金属锂硅酸盐的方法，该物质类别最早由霍佩在20世纪80年代描述。通过合成和表征NaK[LiSiO]，发现了一种新的代表物，扩展了已知碱金属锂硅酸盐的家族。令人惊讶的是，当掺杂Eu时，NaK[LiSiO]以及已确立的碱金属锂硅酸盐Na[LiSiO]和K[LiSiO]表现出意想不到的发光特性。Na[LiSiO]:Eu在近紫外到蓝光激发下呈现超窄蓝色发射，K[LiSiO]:Eu呈现宽带发射，而NaK[LiSiO]:Eu呈现黄绿色双发射。因此，这类化合物中所有被研究的物质都是用于磷光转换发光二极管的极具吸引力的磷光体。
