Controllable Eu valence for photoluminescence tuning in apatite-typed phosphors by the cation cosubstitution effect

Guogang Li; Chun Che Lin; Yi Wei; Zewei Quan; Ying Tian; Yun Zhao; Ting-Shan Chan; Jun Lin

doi:10.1039/c6cc01969b

Controllable Eu valence for photoluminescence tuning in apatite-typed phosphors by the cation cosubstitution effect

Chem Commun (Camb). 2016 May 31;52(46):7376-9. doi: 10.1039/c6cc01969b.

Authors

Guogang Li¹, Chun Che Lin², Yi Wei¹, Zewei Quan³, Ying Tian¹, Yun Zhao¹, Ting-Shan Chan⁴, Jun Lin⁵

Affiliations

¹ Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China. ggli8312@gmail.com.
² Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands. cclin0530@gmail.com.
³ Department of Chemistry, South University of Science and Technology of China, Shenzhen, Guangdong 518055, P. R. China.
⁴ National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan.
⁵ State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. jlin@ciac.ac.cn.

PMID: 27188763
DOI: 10.1039/c6cc01969b

Abstract

By cosubstituting [Ca(2+)-P(5+)] for [La(3+)-Si(4+)] in the Eu-doped Ca(2→8)La(8→2)(SiO4)6-x(PO4)xO2 (0 ≤ x ≤ 6) system, Eu(3+) ions are controllably and gradually transformed to Eu(2+). Thus, the emission colors consecutively changed from red to blue/green light. Furthermore, excellent warm-white lights with the low correlated color temperature (CCT) range of 3500-3800 K and a high color rendering index (Ra) (88.4-93.2) have been achieved by mixing the as-prepared phosphors at different cation cosubstitution ratios.