Recombination zone in mixed-host organic light-emitting devices
- 16 October 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 89 (16) , 163511
- https://doi.org/10.1063/1.2361266
Abstract
In this letter, the authors had quantitatively investigated the recombination zone in the mixed-host (MH) emitting layer (EML) of an organic light-emitting device with different mixed ratios experimentally and theoretically. The MH-EML consisted of a hole-transport layer (HTL) and an electron-transport layer fabricated by coevaporation. When the mixed ratio of the HTL in the EML increases, the driving voltage increases then decreases; this can be well demonstrated by an electrical model with different carrier mobilities. A blueshift was also observed due to the solid state solvation effect combined with the exciton shift from the anode to the cathode side.Keywords
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