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Ya-Ting Tsai, Chung-Tin Lai, Rong-Hong Chien, Jin-Long Hong and An-Chi Yeh Thermal and spectral stability of electroluminescent hyperbranched copolymers containing tetraphenylthiophene-quinoline-triphenylamine moieties Journal of Polymer Science Part A: Polymer Chemistry 50

Article first published online: 14 OCT 2011 | DOI: 10.1002/pola.25020

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Photos clearly showed that the bright green yellow light emitted from devices with the HB-1 and HB-four emitting layers remained essentially un-altered despite the whole assemblies had been annealed at the respective high temperatures of 200 and 300 °C for 4 h. Therefore, it is safe to conclude that the EL spectra of the PLEDs based on the HB-1 and HB-4 copolymers are highly stable.

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