A highly luminescent Mn4+ activated LaAlO3 far-red-emitting phosphor for plant growth LEDs: charge compensation induced Mn4+ incorporation. Issue 20 (27th March 2019)

• Record Type: Journal Article
• Authors: Chen, Yibo; Yang, Conghua; Deng, Meiping; He, Jin; Xu, Yiqin; Liu, Zhao-Qing
• Is Part Of: Dalton transactions. Volume 48:Issue 20(2019)
• Page Start: 6738
• Page End: 6745
• Publication Date: 2019-03-27
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt00762h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A highly luminescent far-red-emitting phosphor LaAlO3 :Mn 4+, Mg 2+ with a quantum yield of 78.6% synthesized with the assistance of MgF2 . Abstract : As a potential far-red-emitting candidate for plant growth LEDs, Mn 4+ activated oxide phosphors have brand-new application prospects. However, it remains a significant challenge to develop highly efficient far-red-emitting phosphors due to their intrinsic energy loss in a large Stokes shift. Herein, we present a rational charge compensation strategy with a fusible charge compensator MgF2 at the molecular level to synthesize a LaAlO3 :Mn 4+, Mg 2+ far-red-emitting phosphor. Notably, MgF2 can play an essential role in the incorporation of Mn 4+ into the crystal matrix during the high-temperature solid-state reaction process, and thus induce a highly luminescent phosphor with a quantum yield of 78.6% and appropriate thermal stability. The fabrication of a high-performance far-red-emitting phosphor-converted LED further identifies the application potential of the modified Mn 4+ activated LaAlO3 phosphor. This finding sheds light on the further exploration of high-grade far-red phosphors.