Issue 6, 2016

The crystal structure and luminescence properties of novel Ce3+ and Ce3+, Sm3+-activated Y4SiAlO8N phosphors for near-UV white LEDs

Abstract

A series of novel Ce3+ and/or Sm3+ activated Y4SiAlO8N (YSAON) phosphors are successfully synthesized by a conventional solid-state reaction method. The formation of monophasic YSAON is confirmed by X-ray powder diffraction (XRD) analysis. The crystal structure of YSAON is solved by XRD refinement data. DFT calculations indicate that Y4SiAlO8N has an indirect band gap of 3.819 eV. Based on the analysis of crystal structure and lifetime curves, four emission sites of YSAON:0.02Ce3+ are identified, which are Y1 (413 nm, 448 nm), Y2 (428 nm, 469 nm), Y3 (619 nm, 698 nm) and Y4 (512 nm, 569 nm), respectively. The concentration quenching of Ce3+ in YSAON is investigated in detail and it is confirmed to be due to dipole–dipole interactions. Photoluminescence excitation (PLE) and photoluminescence (PL) spectral measurements showed that the Ce3+ and Sm3+ co-doped phosphor could be efficiently excited by near-UV light, and exhibited four emission bands peaked at 485 nm, 565 nm, 605 nm and 650 nm, respectively. The CIE chromaticity coordinates of the obtained white light can be tuned by adjusting the content of Ce3+ and Sm3+ ions. Therefore, we anticipate that these materials can be used in near-UV chip pumped white LEDs.

Graphical abstract: The crystal structure and luminescence properties of novel Ce3+ and Ce3+, Sm3+-activated Y4SiAlO8N phosphors for near-UV white LEDs

Supplementary files

Article information

Article type
Paper
Submitted
28 Dec 2015
Accepted
07 Apr 2016
First published
08 Apr 2016

New J. Chem., 2016,40, 5458-5466

Author version available

The crystal structure and luminescence properties of novel Ce3+ and Ce3+, Sm3+-activated Y4SiAlO8N phosphors for near-UV white LEDs

Y. Hua, X. Li, D. Zhang, H. Ma, D. Deng and S. Xu, New J. Chem., 2016, 40, 5458 DOI: 10.1039/C5NJ03712C

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