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Engineering the lattice site occupancy of apatite-structure phosphors for effective broad-band emission through cation pairing

Title
Engineering the lattice site occupancy of apatite-structure phosphors for effective broad-band emission through cation pairing
Author
임원빈
Keywords
CRYSTAL-STRUCTURE; CRYSTAL-STRUCTURE; EVOLUTION; ENERGY
Issue Date
2017-05
Publisher
AMER CHEMICAL SOC
Citation
INORGANIC CHEMISTRY, v. 56, no. 10, page. 5696-5703
Abstract
A series of britholite compounds were synthesized by simultaneous introduction of trivalent La3+ and Si4+ ions into an apatite structure. The variations in the average structure, electronic band structure, and microstructural properties resulting from the introduction of cation pairs were analyzed as a function of their concentration. The effects of the structural variance and microstructural properties on the broad-band-emitting activator ions were studied by introducing Eu2+ ions as activators. For the resulting compound, which had dual emission bands in the blue and yellow regions of the spectrum, the emission peak position And strength were dependent upon the concentration of La3+-Si4+ pairs. By engineering the relative sizes of the two possible activator sites in the structure, 4f and 6h, through the introduction of a combination of trivalent La3+ and a polyanion, the preferential site occupancy of the activator ions was favorably altered. Additionally, the activator ions responsible for the lower-Stokes-shifted blue component of the emission functioned as a sensitizer of the larger-Stokes-shifted yellow emitting activators, and predominantly yellow-emitting phosphors were achieved. The feasibility of developing a white light emitting Sad-state device using the developed phosphor was also demonstrated.
URI
https://pubs.acs.org/doi/10.1021/acs.inorgchem.7b00310https://repository.hanyang.ac.kr/handle/20.500.11754/114107
ISSN
0020-1669; 1520-510X
DOI
10.1021/acs.inorgchem.7b00310
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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