Cryolite (Na3AlF6) was assumed to be a promising luminescent host for near-infrared photon emission with transition metal (TM)/rare earth (RE) ions as dopants. Micron cryolite samples were obtained through hydrothermal reaction, while nanocrystals were synthesized via solvothermal reaction. It is demonstrated that RE3+ ions having large radii cannot be doped into Na3AlF6 host lattice by replacing Al3+ sites that with smaller radius. TM ions(TM=Mn2+, Ni2+,Cr3+, Fe3+) are successfully doped into Na3AlF6 with substitution of Al3+ sites,while the Cr3+ doped Na3AlF6 exhibited broad efficient deep-red emission at ~720 nm. A systematic study of luminescence intensity versus Cr3+ concentration was explored to obtained the optimized cryolite phosphor. Energy decay dynamics was systematically analyzed on the basis of theoretical model and experimental data. Heat-treated micron phosphor and Na3AlF6:60mol%Cr3+@Na3AlF6 nanoparticles were proved to have efficient luminescence, which create big chance for advanced red/far-red light-emitting diodes (LEDs) and specific application like bioimaging in vivo.
Subject (authority = RUETD)
Topic
Chemical and Biochemical Engineering
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_8654
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (viii, 59 p. : ill.)
Note (type = degree)
M.S.T.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Cryolite
Note (type = statement of responsibility)
by Yuanshu Zhou
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.