Scientists of the Westfaelische-Wilhems University Muenster and Sensient developed dopants for Organic Light Emitting Diodes (OLED). The tri and bi-dental platinum (II) complexes with phosphite or dianionic NNC/NNN ligands are triplet emitters with excellent quantum efficiencies. OLEDs consist of electro-luminescent substances, embedded in a polymer matrix. To emit exzitones, an electric current, triggered energy transfer is needed. Useful electroluminescent dopants are metal complexes like platinum complexes. The quantum efficiencies depend on the electronic behavior of the ligands used. Therefore useful and efficient substances like P-Phos are required.
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