Narrow-Band Red Emission in the Nitridolithoaluminate Sr4[LiAl11N14]:Eu2+
| Autor: | Markus Seibald, Dominik Baumann, Hubert Huppertz, Gunter Heymann, Klaus Wurst, Dominik Wilhelm |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Materials science business.industry General Chemical Engineering chemistry.chemical_element PNNM Phosphor 02 engineering and technology General Chemistry Crystal structure Tungsten 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallography Tetragonal crystal system Optics chemistry Excited state Materials Chemistry Orthorhombic crystal system 0210 nano-technology business |
| Zdroj: | Chemistry of Materials. 29:1204-1209 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.6b04519 |
| Popis: | The new narrow-band red-emitting phosphor material Sr4[LiAl11N14]:Eu2+ was synthesized by solid-state reaction using a tungsten crucible with a cover plate in a tube furnace. When excited with blue light (460 nm), it exhibits red fluorescence with an emission maximum at 670 nm and a full width at half-maximum of 1880 cm–1 (∼85 nm). The crystal structure was solved and refined from single-crystal X-ray diffraction data. This new compound from the group of the nitridolithoaluminates crystallizes in the orthorhombic space group Pnnm (No. 58) with the following unit-cell parameters: a = 10.4291(7) A, b = 10.4309(7) A, and c = 3.2349(2) A. Sr4[LiAl11N14]:Eu2+ shows a pronounced tetragonal pseudo-symmetry. It consists of a framework of disordered (Al/Li)N4 and AlN4 tetrahedra that are connected to each other by common corners and edges. Along the [001] direction, the tetrahedral network creates empty four-membered-ring channels as well as five-membered-ring channels, in which the Sr2+ cations are located. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|