Crystal Structure and Photoluminescence Evolution of La5 (Si2+ x B1–x)(O13–x N x): Ce3+ Solid Solution Phosphors
- Authors
- Xia, Zhiguo; Molokeev, Maxim S.; Im, Won Bin; Unithrattil, Sanjith; Liu, Quanlin
- Issue Date
- Apr-2015
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.119, no.17, pp.9488 - 9495
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 119
- Number
- 17
- Start Page
- 9488
- End Page
- 9495
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157462
- DOI
- 10.1021/acs.jpcc.5b01211
- ISSN
- 1932-7447
- Abstract
- A series of iso-structural La-5(Si2+xB1-x)(O13-xNx):Ce3+ phosphors with apatite structure have been prepared. A combination of powder X-ray diffraction and neutron scattering technique was employed to explore the crystal structural evolution and the rigid nature from oxy- to oxynitride-based apatites, and some local structures were also characterized by HRTEM and Si-29 NMR data, respectively. The new La-5(Si2+xB1-x)(O13-xNx):Ce3+ solid solution phosphors gave continuously controlled emission from 421 nm [La5Si2BO13:Ce3+, end-member (x = 0)] to 463 nm (La(5)Si3O12N:Ce3+, end-member (x = 1)). Substitution of B3+ and O-2 by Si4+ and N-3 in La-5(Si2+xB1-x)(O13-xNx):Ce3+ phosphors produced more covalency into the crystal field environment around the Ce3+ ions inducing the red-shifted emission, further improving the thermal stability of the oxynitride-based apatite phosphors. The proposed approach from oxy- to oxynitride based iso-structural phases could significantly contribute to future research in designing complex solid solution phosphors.
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