Derivatives of Phenyl Pyrimidine and of the Different Donor Moieties as Emitters for OLEDs.

ABSTRACT: Two derivatives of phenyl pyrimidine as acceptor unit and triphenylamino or 4,4'-dimethoxytriphenylamino donor groups were designed and synthesized as emitters for organic light-emitting diodes (OLEDs) aiming to utilize triplet excitons in the electroluminescence. Thermogravimetric analysis revealed high thermal stability of the compounds with 5% weight loss temperatures of 397 and 438 °C. The theoretical estimations and photophysical data show the contributions of local excited and charge transfer states into emission. The addition of the methoxy groups led to the significant improvement of hole-transporting properties and the bathochromic shift of the emission from blue to green-blue spectral diapason. It is shown that mixing of the compounds with the organic host results in facilitation

SUBMITTER: Starykov H 

PROVIDER: S-EPMC10972299 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature