title: Deep blue polymer light emitting diodes based on easy to synthesize, non-aggregating polypyrene.
abstract: Thorough analyses of the photo- and devicephysics of poly-7-tert-butyl-1,3-pyrenylene (PPyr) by the means of absorption and photoluminescence emission, time resolved photoluminescence and photoinduced absorption spectroscopy as well as organic light emitting devices (OLEDs) are presented in this contribution. Thereby we find that this novel class of polymers shows deep blue light emission as required for OLEDs and does not exhibit excimer or aggregate emission when processed from solvents with low polarity. Moreover the decay dynamics of the compound is found to be comparable to that of well blue emitting conjugated polymers such as polyfluorene. OLEDs built in an improved device assembly show stable bright blue emission for the PPyr homopolymer and further a considerable efficiency enhancement can be demonstrated using a triphenylamine(TPA)/pyrene copolymer.
authors: Christian Doppler Laboratory for Nanocomposite Solarcells, NanoTecCenter Weiz Forschungsgesellschaft m.b.H., Franz-Pichler- Straße 32, A-8160 Weiz, Austria.
authors: Roman
authors: R
authors: Trattnig
authors: Teresa M
authors: TM
authors: Figueira-Duarte
authors: Dominik
authors: D
authors: Lorbach
authors: Wolfgang
authors: W
authors: Wiedemair
authors: Stefan
authors: S
authors: Sax
authors: Stefanie
authors: S
authors: Winkler
authors: Antje
authors: A
authors: Vollmer
authors: Norbert
authors: N
authors: Koch
authors: Marianna
authors: M
authors: Manca
authors: Maria Antonietta
authors: MA
authors: Loi
authors: Martin
authors: M
authors: Baumgarten
authors: Emil J W
authors: EJ
authors: List
authors: Klaus
authors: K
authors: Müllen