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Issue 12, 2019
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A rate equation model for the energy transfer mechanism of a novel multi-color-emissive phosphor, Ca1.624Sr0.376Si5O3N6:Eu2+

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Abstract

Multi-color emissions (or broadband emissions) from a single-phase phosphor with a single activator are an unfamiliar idea compared with those from multi-color-center materials. A single activator that is located in different crystallographic sites of a single-phase phosphor, however, could lead to multimodal emission peaks for multi-color (or broadband) emissions. The discovery of a single-phase-single-activator-broadband-phosphor is rare, and it is regarded as difficult to accomplish. The present investigation introduces a novel single-phase-single-activator-broadband-phosphor (Ca1.624Sr0.376Si5O3N6:Eu2+) and provides an in-depth examination of the energy transfer between different crystallographic sites which is the governing mechanism for the broadband emissions. Structural analysis is backed up by density functional theory (DFT) calculations, which validate the structural model of the discovered novel phosphor. Rate-equation modeling is introduced based on particle swarm optimization (PSO) to provide a complete quantitative analysis for the mechanism of the energy transfer.

Graphical abstract: A rate equation model for the energy transfer mechanism of a novel multi-color-emissive phosphor, Ca1.624Sr0.376Si5O3N6:Eu2+

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Supplementary files

Article information


Submitted
09 Aug 2019
Accepted
02 Oct 2019
First published
02 Oct 2019

Inorg. Chem. Front., 2019,6, 3493-3500
Article type
Research Article

A rate equation model for the energy transfer mechanism of a novel multi-color-emissive phosphor, Ca1.624Sr0.376Si5O3N6:Eu2+

J. H. Lee, S. P. Singh, M. Kim, M. Pyo, W. B. Park and K. Sohn, Inorg. Chem. Front., 2019, 6, 3493
DOI: 10.1039/C9QI01002E

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