Electronic and optical properties of a novel fluoroaluminate red phosphor Cs2NaAl3F12:Mn4+ with high color purity for white light-emitting diodes

Zibo Liang; Zhaofeng Yang; Xiaoling Xie; Haiqi Pu; Dongxin Shi; Qiang Zhou; Zhengliang Wang; Junming Guo; Mingmei Wu

doi:10.1039/c9dt02577d

Electronic and optical properties of a novel fluoroaluminate red phosphor Cs₂NaAl₃F₁₂:Mn⁴⁺ with high color purity for white light-emitting diodes

Dalton Trans. 2019 Sep 7;48(33):12459-12465. doi: 10.1039/c9dt02577d. Epub 2019 Jul 29.

Authors

Zibo Liang¹, Zhaofeng Yang¹, Xiaoling Xie¹, Haiqi Pu¹, Dongxin Shi¹, Qiang Zhou¹, Zhengliang Wang¹, Junming Guo¹, Mingmei Wu²

Affiliations

¹ Key Laboratory of Green-chemistry Materials in University of Yunnan Province, National and Local Joint Engineering Research Center for Green Preparation Technology of Biobased Materials, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P. R. China. xchow123@126.com.
² MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. ceswmm@mail.sysu.edu.cn.

PMID: 31353369
DOI: 10.1039/c9dt02577d

Abstract

In this work, a novel fluoroaluminate red phosphor of Cs₂NaAl₃F₁₂:Mn⁴⁺ with excellent color purity was fabricated via the introduction of Mn⁴⁺ in the octahedral center. The crystal and electronic structures, luminescence properties and optical performances were characterized and investigated in detail. The evidences showed that Cs₂NaAl₃F₁₂:Mn⁴⁺ well-crystallized into a single phase with particulate morphology, and the non-equivalent occupation in Cs₂NaAl₃F₁₂ resulted in sharp red emissions with improved color purity upon blue light illumination. For solid-state lighting, the optical parameters consisted of the "blue-yellow-red" contributions significantly improved to a high color-rendering index of 88.7 and a low color temperature of 3856 K, indicating the potential use of Cs₂NaAl₃F₁₂:Mn⁴⁺ for warm white light-emitting diode applications.