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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry

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희토류 이온(Er/Yb)이 도핑된 LaPO 4 나노입자의 합성과 발광특성

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Title
희토류 이온(Er/Yb)이 도핑된 LaPO 4 나노입자의 합성과 발광특성
Other Titles
Preparation and Luminescent Properties of LaPO 4 :Re (Re=Er, Yb) Nanoparticles
Author
Oh, Jae-SukLee, Tack-HyuckSeok, Sang IlJung, Ha-Kyun
Issue Date
2004-04
Publisher
한국재료학회
Citation
한국재료학회지, v.14, no.4, pp.270 - 275
Abstract
Due to the luminescence by Er 3+ activator, Er-doped LaPO 4 powders can be applied for optical amplification materials. In this study, LaPO 4 :Er nanoparticles were synthesized in solution system using a high-boiling coordinating solvent and their properties were investigated through various spectroscopic techniques. The nanoparticles were to take a single phase of monazite structure by a X-ray diffraction analysis and to have the 5-6 nm of particles size with narrow size distribution by a TEM. And it was confirmed by the EA and FT-IR analyses that the surfaces of nanoparticles are coordinated with the solvent molecules, which will possibly keep from agglomerating between LaPO 4 :Er nanoparticles. In the emission spectrum of LaPO 4 :Er nanoparticle at NIR region, on the other hand, it was measured that the emission intensity is very weak, which is due to the transition from 4 I (13/2) to 4 I (15/2) of Er 3+ ion. It was interpreted that the weak luminescence of LaPO 4 :Er is originated from the hydroxyl groups adsorbed on the surfaces of the nanoparticles, because OH group acts as an efficient quencher for the 4 I (13/2) \longrightarrow 4 I (15/2) emission of Er 3+ activator. But the co-doping of Yb 3+ as a sensitizer in this nanoparticle results in the increase of the emission intensity at 1539 nm due to the effective energy transfer from Yb 3+ to Er 3+ . In addition, the synthesized nanoparticles exhibited good dispersibility with some polymers and effective luminescence at NIR region.n.
URI
https://scholarworks.unist.ac.kr/handle/201301/18696
URL
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=GJRHBQ_2004_v14n4_270
DOI
10.3740/MRSK.2004.14.4.270
ISSN
1225-0562
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