Abstract
One-dimensional La(OH)3:Ln3+ (Ln = Yb/Er, Yb/Tm, Yb/Ho) microrods have been successfully synthesized using molten composite-hydroxide (NaOH/KOH) as a solvent. La2O3:Ln3+ nanostructures with retained striplike shape were achieved by a subsequent annealing process. The phase, structure, morphology, and fluorescent properties have been well investigated by various techniques. It is found that the reaction time plays a key role in confining the growth of the microrods. Both La(OH)3:Ln3+ and La2O3:Ln3+ nanostructures have rodlike shapes with a typical width of 50–400 nm. The up-conversion (UC) photoluminescence (PL) properties of the samples have been studied in detail. Under 980 nm laser excitation, both La(OH)3:Ln3+ and La2O3:Ln3+ microrods exhibit the characteristic emissions of Er3+, Tm3+, and Ho3+ and give green, blue, and blackish green emission colors, respectively. Additionally, the doping concentration of Yb3+ has been optimized by fixing the Er3+ concentration. It should be noted that the up-conversion emission of La2O3:Er3+ microrods can be significantly improved in comparison with that of their bulk counterpart under the same excitation conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
