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Ce3+-Sensitized GdPO4:Tb3+ Nanorods: An Investigation on Energy Transfer, Luminescence Switching, and Quantum Yield

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Title Ce3+-Sensitized GdPO4:Tb3+ Nanorods: An Investigation on Energy Transfer, Luminescence Switching, and Quantum Yield
 
Creator SAHU, NK
SINGH, NS
NINGTHOUJAM, RS
BAHADUR, D
 
Subject photoluminescence
energy transfer
redispersion
polymer film
magnetic behavior
optical switching
CONTRAST AGENTS
NANOPARTICLES
EU3+
EMISSION
LN(3+)
CE3+
SIZE
MULTICOLOR
NANOWIRES
DY3+
 
Description Herein we report the enhanced green emission from Tb3+-doped GdPO4 nanorods sensitized with Ce3+. The increase in the rate of nonradiative transition processes in sensitizer due to efficient energy transfer to activator is realized from steady-state and dynamic luminescence studies. Luminescence quenching due to cross relaxation is least significant up to 20 at. % Ce3+ and 7 at. % Tb3+ concentration. The quantum yield of the sample with maximum luminescence, i.e., GdPO4:Tb3+ (5 at. %)/Ce3+ (7 at. %), is found to be 28%. Also, samples are readily redispersible in water and could be easily incorporated in polymer-based films that show strong green light emission under UV excitation. The luminescence switching (ON and OFF) behavior is examined using alternately an oxidizing agent (KMnO4) and then a reducing agent (ascorbic acid) through a redox reaction (Ce3+/Ce4+). Both GdPO4:Tb3+ and GdPO4:Tb3+/Ce3+ are observed to be paramagnetic.
 
Publisher AMER CHEMICAL SOC
 
Date 2014-12-29T05:58:12Z
2014-12-29T05:58:12Z
2014
 
Type Article
 
Identifier ACS PHOTONICS, 1(4)337-346
2330-4022
http://dx.doi.org/10.1021/ph4001718
http://dspace.library.iitb.ac.in/jspui/handle/100/17252
 
Language English