Low-voltage inverted transparent vacuum deposited organic light-emitting diodes using electrical doping
- 29 July 2002
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 81 (5) , 922-924
- https://doi.org/10.1063/1.1496502
Abstract
We demonstrate low-voltage inverted transparent vacuum deposited organic light-emitting diodes employing an indium-tin-oxide coated glass substrate directly as cathode and a semitransparent top Au thin film as anode. The devices comprise an intrinsic 8-tris-hydroxyquinoline aluminum (Alq3) emitting layer sandwiched in between n- and p-doped charge transport layer with appropriate blocking layers. They exhibit low driving voltages (∼4 V for a luminance of ∼100 cd/m2). The devices are about 50% transparent in the Alq3 emission region and emit green light from both sides with a total external current efficiency of about 2.5 cd/A.Keywords
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