Rubrene and other acenes are common luminescent materials used in light-emitting devices; however, the performance of devices based on these materials decreases as the materials decompose. This hot paper describes a new class of sterically crowded tetracene derivatives that have both phenyl and ethynyl substituents. The steric crowding above and below the tetracene core prevents overlap between the extended π-systems of the acenes. The arenes reported have spectra similar to diarylpentacenes, but with higher quantum yields of fluorescence and greater photostability. Read this article for free until 23rd May.
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