Metal/fullerene bilayers have been studied as hole injection electrodes for use in organic light-emitting diodes (OLEDs). In the case of a simple emission zone structure, it is found that OLEDs with the anodes have much lower driving voltages and much higher current efficiencies (five times higher) than OLEDs with a simple Au anode. This anode structure was found to be applicable for all types of light-emitting structures including fluorescent and phosphorescent dye-doped systems. The formation of a primary bond at the interface is explained as the major cause for efficient hole injection from Au to . The hole transfer barrier between and the adjacent hole transport layer is also found critical in selecting suitable matching materials to achieve highly efficient OLEDs.
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Research Article| October 04 2006
Highly efficient organic light-emitting diodes with metal/fullerene anode
Sijin Han, Yanyan Yuan, Zheng-Hong Lu; Highly efficient organic light-emitting diodes with metal/fullerene anode. J. Appl. Phys. 1 October 2006; 100 (7): 074504. https://doi.org/10.1063/1.2354319
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