| Autor: |
Lai, S. L., Chan, M. Y., Fung, M. K., Lee, C. S., Lee, S. T. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 1/1/2007, Vol. 101 Issue 1, p014509-N.PAG, 4p, 2 Diagrams, 3 Graphs |
| Abstrakt: |
A nondoped organic system of copper hexadecafluorophthalocyanine (F16CuPc)/copper phthalocyanine (CuPc) has been investigated as a connecting unit for deep-blue electrofluorescent tandem organic light-emitting devices (OLEDs) based on 2-methyl-9,10-di(2-naphthyl) anthracene emission. Such devices exhibited a doubling in current efficiency from 0.63 to 1.47 cd/A at J=100 mA/cm2 as compared to the single-unit device. The pure organic connecting unit showed superior optical transparency (∼100%), resulting in minimal microcavity effect in the devices. Interface dipole and band bending on both sides of the F16CuPc/CuPc interface suggested the formation of an intrinsic p-n junction, which is a prerequisite of an effective connecting unit leading to a dramatic performance improvement in the tandem OLEDs. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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