Title Electron rich N-heterotriangulenes as host materials for OLEDs
Authors Warrington, Stefan ; Cameron, Joseph ; Wilson, Claire ; Volyniuk, Dmytro ; Wilkinson, Dylan ; Grazulevicius, Juozas Vidas ; Skabara, Peter J ; Cooke, Graeme
DOI 10.1039/d5tc01004g
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Is Part of Journal of materials chemistry C.. Cambridge : Royal Society of Chemistry. 2025, vol. 13, iss. 31, p. 15988-15996.. ISSN 2050-7526. eISSN 2050-7534
Abstract [eng] Triphenylamine-based materials have been extensively studied as hole-transporting materials for organic semiconductor devices due to their high hole mobility and thermal stability. For example, they may be used as either hole-transporting layers in solar cells or p-type host materials in the emissive layer of OLEDs. Here, we present the development of a series of fused triarylamine derivatives in the form of N-heterotriangulene-based systems featuring electron-rich pendent groups and have investigated their structural properties using X-ray crystallography, and their optical and redox properties. Space-charge-limited current measurements were carried out to assess their potential to be used as p-type materials and the materials were applied as hosts in OLEDs with a solution-processed 4CzIPN-doped emissive layer. The best-performing devices exhibited a maximum external quantum efficiency of 6.9%. We have shown that the host can disperse the emitter molecules effectively and avoid dimer formation thereby enhancing OLED performance.
Published Cambridge : Royal Society of Chemistry
Type Journal article
Language English
Publication date 2025
CC license CC license description