Synthesis, structure, and luminescence properties of a novel double-perovskite Sr2LaNbO6:Mn4+ phosphor. (April 2017)

• Record Type: Journal Article
• Authors: Fu, Anjie; Guan, Anxiang; Yu, Dongyan; Xia, Siyu; Gao, Fangfang; Zhang, Xiaoshan; Zhou, Liya; Li, Yinghao; Li, Rongguan
• Is Part Of: Materials research bulletin. Volume 88(2017)
• Page Start: 258
• Page End: 265
• Publication Date: 2017-04
• Subjects: Perovskite -- Red phosphor -- Luminescence properties -- Manganese; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2016.12.045
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Red phosphors Sr2 LaNbO6 :Mn 4+ phosphor were synthesized for the first time. Nb 5+ sites of double perovskite compounds Sr2 LaNbO6 is suitable for Mn 4+ to occupy. Board excitation bands can be efficiently excited by near-UV/blue light to emit deep red emission. Temperature dependence spectra is investigated to demonstrate its good thermal stability. Abstract: A novel phosphor, Sr2 LaNbO6 :Mn 4+, is synthesized by conventional solid-state reaction. The phosphor can be excited at 300–500 nm and emit a deep-red light. An emission band peak of 694 nm is observed from the spin-forbidden transition 2 E → 4 A2 of Mn 4+ ions. Energy transfer between the Mn 4+ –Mn 4+ pairs decreases fluorescence decay time from 0.815 ms to 0.512 ms. The resistance of luminescence against thermal impact is also investigated by emission spectroscopy at heating temperatures from 300 K to 500 K. The calculated activation energy Δ E (∼0.345 eV) demonstrate good thermal stability of the phosphors. All these results indicate that the phosphor can be applied in white-light-emitting diodes.