Electroluminescence from Polyphenylene-Based Materials

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Abstract
Poly(phenylene) and its copolymers are a new family of electroluminescent materials with high thermal stability. Their photoluminescent and physical properties were modified in a controlled fashion by copolymerization of the cyclohexadiene-1,2-diacetate monomer (DAC) with both vinylbiphenyl (VBP) and vinyl-N-carbazole (VCZ). Polyphenylene thin films exhibited green photoluminescence centered around 520 nm. The incorporation of unaromatized comonomers into polyphenylene films blue-shifted wavelengths of maximum photoluminescence centered around 500 nm for the DAC/VBP copolymer (8:2). Similarly, polyphenylene thin films exhibited green electroluminescence centered around 505 nm for a device configuration of Al(-)/polyphenylene/ITO(+). The incorporation of unaromatized comonomers into polyphenylene films blue-shifted wavelengths of maximum electroluminescence centered around 495 nm for a device configuration of Al(-)/DAC-VBP copolymer (8:2)/ITO(+).