The new, simple low-voltage cathodoluminescece set-up was designed and plotted. The set-up was designed on the base
of field emission light emitting device with carbon nanotube (CNT) cold cathode and anode covered by layer of
nancrystalline phosphor. The concept of set-up allowed for measuring of emissive properties of even 8 different samples
in a very short time. The samples are placed in the vacuum chamber and the luminescent spectra are recorded using
outside placed fiber spectrophotometer. The pressure in the set-up is controlled by vacuum sensor. The opportunities and
application of presented conception of set-up will be discussed.
The terbium-doped yttrium aluminum garnet nanoparticles were synthesized by the modified Pechini method. In order
to determination of the structure and the morphology of obtained nanocrystallites the XRD and TEM analysis were
carried out. Next, to the ITO nanocrystallites-based slurries Tb:YAG nanoparticles were added. On the base of prepared
colloidal suspension the layers were fabricated by the spin-coating method. The resistivity, an optical transmission and
the luminescent properties of obtained layers were registered and compared. The influence of fabrication conditions on
optical and electrical properties of obtained layers and their potential application will be discussed in this work.
The europium-doped tin dioxide nanopowders were synthesized using modified Pechini method. The samples with
different Eu3+ concentration were sintered at different temperatures. In order to determination of structure and
morphology of obtained powders X-ray diffraction (XRD) measurement and transmission electron microscopy (TEM)
investigation were carried out. Photoluminescence of obtained powders were measured. Intensity of emission was
compared using (blue ZnS:Ag) reference peak method. After that mixed powders were deposited on ITO-glass slide. The
cathodoluminescence of obtained layers was also measured and compared. The properties and the potential application
of obtained nanopowders will be discussed.
The Eu3+-doped Y2O3-particles of size 3.5 μm were coated with a layer of indium tin oxide precursor (ITO) and cured
at 120oC. The coating process was repeated four times. Finally, samples were annealed at 700 °C to form a cubic
structure of ITO. The morphology and structure of obtained ITO- Eu:Y2O3 core-shells materials were determined by the
X-ray diffraction (XRD), transmission electro-microscopy (TEM) and scanning electron-microscopy (SEM) analyses. In
order to comparison of emissive properties, obtained was mixed with micrograins of ZnS:Ag in the same mass ratio. The
photo- and cathodoluminescent spectra of obtained structures materials were determined and analyzed. The possible
applications are discussed.
The luminescence properties of the Nd3+:LaAlO3 nanocrystalline powders characterized by different sizes of grains in the range of 25-50 nm were investigated. The effect of the nanocrystallites sizes on the luminescence behavior of Nd3+ was observed. In particular decreasing the grain sizes was found to increase emission from the thermally populated 4F5/2 state. It's intensity increased with the increase of excitation power density. The spectroscopic parameters of Nd3+ doped LaAlO3 nanocrystallites were determined from luminescence spectra by using the Judd-Ofelt method and compared to those obtained for a single crystal of Nd3+:LaAlO3.