Copolymers of carbazole- and indolocarbazole-containing phenylquinolines as new materials for electroluminescent devices

Molecular design of optoelectronic structures based on carbazole- and indolocarbazole-containing polyphenylquinolines

“…The photophysical (optical, photosensitive, and luminescent) properties of the PPQs were studied both in the stage of isolated macromolecules (in solution) and in that of interacting molecules (in a film) at their various intermolecular interactions (for PPQ molecules in different matrices). [34][35][36][37][38] The matrix isolation method we used 34 made it possible to minimize intermacromolecular interactions whose enhancement in coatings leads to an efficient luminescence quenching. To distinguish between the intramolecular and intermacromolecular energy transfer processes, we studied the photoluminescence (PL) from mixtures of PPQ homopolymers.…”

“…One recorded the spectrum in the range 380-700 nm with excitation wavelengths exc at 350-425 nm using the procedure reported in literature. [32][33][34][35][36][37][38][39] PPQs in a matrix were prepared by casting the solutions of PPQ and a suitable matrix polymer onto a glass substrate.…”

“…32 The PPQs under study, having various Ar moieties in their structural unit, possess a high carrier mobility 33 and exhibit an intense luminescence in the visible spectral range both in solution and in polymeric matrices (polymethylmethacrylate, poly-N-vinylcarbazole). [34][35][36][37][38][39] The characteristics obtained for some PPQs under investigation indicate that these compounds can be used as materials for optoelectronics and, in particular, for polymeric light-emitting diodes. Application of these materials in electroluminescent devices may require their emission in a wide spectral range (white luminescence).…”

“…It almost corresponds to the achromatic color with the CIE colorimetric standard (CIE 1931) chromaticity coordinates equal to (0.333, 0.333). [36][37][38] Our study aimed to synthesize some PPQs and copolymers with Cz and ICz fragments and to analyze the molecular structure and the ionization potentials of both the Ar moiety (I D Ar ) and the bridging group X (I D X ). Furthermore, their optical (absorption, photosensitivity, luminescence) and electrical characteristics are investigated as well.…”

Conductivity and Density of States of New Polyphenylquinoline

“…A nitrogen-containing donor fragment, for example, carbazole or indolo [3,2-b] carbazole, in the UV spectra, shifts the absorption edge of PPQ (PA, Ar) significantly (up to 70 nm) to the long-wavelength region and the photosensitive and transport properties are enhanced [8]. Synthesized PPQs, which have different aromatic Ar fragments in the structure of the elementary unit, have high values of carrier mobility [9] and exhibit intensive luminescence in the visible spectral region in solution and in composites [7,10,11,12,13]. The obtained characteristics for a number of studied PPQs indicate the possibility of their use as materials for optoelectronics, in particular, polymer light-emitting diodes.…”