N-Type Conjugated Materials Based on 2-Vinyl-4,5-dicyanoimidazoles and Their Use in Solar Cells
Chemistry of Materials2007Vol. 19(8), pp. 1892–1894
Citations Over TimeTop 10% of 2007 papers
Abstract
The high-yield syntheses of a new class of n-type conjugated materials based on the Heck coupling of 2-vinyl-4,5-dicyanoimidazole with selected dibromoaromatics is reported. The resultant materials have tunable HOMO−LUMO levels and photoluminescence ranging from deep blue to red. Solution-processed organic solar cells with external quantum efficiencies exceeding 14% could be prepared by blending selected novel materials with poly-(3-hexylthiophene) (P3HT).
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