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New promising materials for OLED displays have been created at MSU

Chemists from Lomonosov Moscow State University and various institutes of the Russian Academy of Sciences together with German colleagues for the first time obtained new organometallic compounds — promising materials for OLED type LEDs. They are capable of emitting all three primary colours necessary for functioning of displays. The corresponding article is published in the Journal of Luminescence.
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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.

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