Conjugated zwitterionic polyelectrolyte as the charge injection layer for high-performance polymer light-emitting diodes |
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| Authors: | Fang Junfeng Wallikewitz Bodo H Gao Feng Tu Guoli Müller Christian Pace Giuseppina Friend Richard H Huck Wilhelm T S |
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| Institution: | Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK. |
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| Abstract: | A new zwitterionic conjugated polyelectrolyte without free counterions has been used as an electron injection material in polymer light-emitting diodes. Both the efficiency and maximum brightness were considerably improved in comparison with standard Ca cathode devices. The devices showed very fast response times, indicating that the improved performance is, in addition to hole blocking, due to dipoles at the cathode interface, which facilitate electron injection. |
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