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Updated: Apr 11, 2026

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
Solution-Processable n-Type Organic Semiconductors Based on Angular-Shaped
Debin Xia1, Tomasz Marszalek1, Mengmeng Li1
1†Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
None:
The angular-shaped n-type semiconductors 2-(12H-dibenzofluoren-12-ylidene)malononitrilediimide 2a and 2b were successfully designed, synthesized, and fully characterized by optical absorption and fluorescence, cyclic voltammetry, X-ray crystal structure analysis, XRD, and OFET device performance. The varying alkyl chain lengths of 2a and 2b caused different molecular orientations with respect to the substrate. Thus, 2a presents an electron mobility of 0.01 cm(2) V(-1) s(-1), whereas 2b resulted in poor device performance with a much lower electron mobility of 5 × 10(-4) cm(2) V(-1) s(-1).
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