title: Narrow-band red-emitting Sr[LiAl₃N₄]:Eu²⁺ as a next-generation LED-phosphor material.
abstract: To facilitate the next generation of high-power white-light-emitting diodes (white LEDs), the discovery of more efficient red-emitting phosphor materials is essential. In this regard, the hardly explored compound class of nitridoaluminates affords a new material with superior luminescence properties. Doped with Eu(2+), Sr[LiAl3N4] emerged as a new high-performance narrow-band red-emitting phosphor material, which can efficiently be excited by GaN-based blue LEDs. Owing to the highly efficient red emission at λ(max) ~ 650 nm with a full-width at half-maximum of ~1,180 cm(-1) (~50 nm) that shows only very low thermal quenching (>95% relative to the quantum efficiency at 200 °C), a prototype phosphor-converted LED (pc-LED), employing Sr[LiAl3N4]:Eu(2+) as the red-emitting component, already shows an increase of 14% in luminous efficacy compared with a commercially available high colour rendering index (CRI) LED, together with an excellent colour rendition (R(a)8 = 91, R9 = 57). Therefore, we predict great potential for industrial applications in high-power white pc-LEDs.
authors: Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany.
authors: Philipp
authors: P
authors: Pust
authors: Philips Technologie GmbH Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany.
authors: Volker
authors: V
authors: Weiler
authors: Philips Technologie GmbH Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany.
authors: Cora
authors: C
authors: Hecht
authors: Philips Technologie GmbH Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany.
authors: Andreas
authors: A
authors: Tücks
authors: Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany.
authors: Angela S
authors: AS
authors: Wochnik
authors: Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany.
authors: Ann-Kathrin
authors: AK
authors: Henß
authors: Philips Technologie GmbH Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany.
authors: Detlef
authors: D
authors: Wiechert
authors: Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany.
authors: Christina
authors: C
authors: Scheu
authors: Philips Technologie GmbH Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany.
authors: Peter J
authors: PJ
authors: Schmidt
authors: Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany.
authors: Wolfgang
authors: W
authors: Schnick