42 0

Synthesis of Na2SiF6 for Mn4+ activated red-emitting phosphor using an ionic liquid

Title
Synthesis of Na2SiF6 for Mn4+ activated red-emitting phosphor using an ionic liquid
Author
임원빈
Keywords
Fluoride phosphors; Mn4+; Solid-state lighting; Ionic liquid; Red-emitting; LEDs
Issue Date
2020-02
Publisher
ELSEVIER
Citation
JOURNAL OF LUMINESCENCE, v. 218, article no. 116835
Abstract
For the first time, the synthesis of Na2SiF6 powders was achieved through an ionothermal reaction using an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate, without using toxic hydrogen fluoride (HF). Next, these powders were used as a host material to produce the red-emitting phosphor, Na2Si1-xMnxF6 (x = 0.007-0.200), that was synthesized using a low concentration HF solution with dissolved NaMnO4 as the Mn4+ source. The phosphors exhibited red-emission at 610 nm, 618 nm, 629 nm, and 644 nm from the E-2(g)->(4)A(2g) energy levels of Mn4+ under 460 nm excitation. The Na2SiF6 particles were non-agglomerated rod-shaped (similar to 560 nm in length and similar to 230 nm in diameter), while the Na2Si1-xMnxF6 particles were spherically-shaped (similar to 500 nm in diameter). Both of those powders were found to be much smaller than typical fluoride powders, which enables them to potentially improve the efficiency of phosphor-converted white-light-emitting diodes.
URI
https://www.sciencedirect.com/science/article/pii/S0022231319310476?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/161894
ISSN
0022-2313; 1872-7883
DOI
10.1016/j.jlumin.2019.116835
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE