Issue 121, 2015

Large micro-sized K2TiF6:Mn4+ red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

Abstract

A simple chemical method for synthesising large micro-sized K2TiF6:Mn4+ phosphors (50–100 μm) is presented, based on a direct reduction reaction with K2TiF6 particles immersed in KMnO4/HF solution. The Mn4+ concentration in K2TiF6 primarily increases as the initial KMnO4 concentration is increased, subject to the diffusion of Mn4+ ions. However, the relative emission intensity of our synthesised K2TiF6:Mn4+ is first enhanced and then declines with increasing KMnO4 concentration, with an optimum KMnO4 concentration of 0.016 g ml−1, which most likely depends on the concentration quenching effect. The synthesised K2TiF6:Mn4+ (0.35–4.4 at%) phosphors show good thermal stability and can be adopted to fabricate high CRI (Ra > 85) white LEDs for indoor lighting.

Graphical abstract: Large micro-sized K2TiF6:Mn4+ red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

Article information

Article type
Paper
Submitted
19 Aug 2015
Accepted
12 Nov 2015
First published
23 Nov 2015

RSC Adv., 2015,5, 100054-100059

Author version available

Large micro-sized K2TiF6:Mn4+ red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

T. Han, T. Lang, J. Wang, M. Tu and L. Peng, RSC Adv., 2015, 5, 100054 DOI: 10.1039/C5RA16709D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements