무기형광체 재료의 응용 사례
분야
docxHost lattice & Activator ion
▣ Crystal Field Splitting
▣ Three color-LEDs
▣ Plasma Display
▣ PET(Positron Emission Tomography)
▣ Scintillators
▣ quantum cutters
▣ Solar Cells -To make use of low-energy photons, upconversion phosphors are needed.
▣ Upconversion Phosphors
○ A phosphor, most generally, is a substance that exhibits the phenomenon of luminescence.
○ Phosphors are often transition metal compounds or rare earth compounds of various types.
○“Classical” inorganic phosphors usually consist of a host lattice with activator ions doped into it in small concentrations, typically a few mole percent or less.
Host lattice & Activator ion
1st type : weak interaction (Ln3+)
2nd type: strong interaction ( Mn2+, Eu2+, Ce3+, Pb2+,Sb3+, Ce3+, MoO42-, NbO43-
