New promising materials for OLED displays have been created at MSU
The authors of the new work set as their goal to obtain OLED using cheap technologies of the deposition of phosphors from solutions. The scientists have introduced nitrogen atoms into the structure of the organic part of the compound. Because of that the heteroaromatic lanthanide carboxylates, which the scientists used, provided higher mobility of electrons and holes. The presence of nitrogen atoms also prevented rapid polymerisation, thereby increasing the solubility of the new organometallic compounds.
Analysis of the obtained materials conducted using the method of luminescence spectroscopy confirmed that the quantum yield of these materials reaches 100 percent. It means that all excited states formed in the phosphor when electrons pass through it lead to emission of photons of the desired wavelength.