Abstract
We demonstrate the improvement of an indium tin oxide anode contact to an organic light emitting device via oxygen plasma treatment. Enhanced hole-injection efficiency improves dramatically the performance of single-layer doped-polymer devices: the drive voltage drops from >20 to <10 V, the external electroluminescence quantum efficiency (backside emission only) increases by a factor of 4 (from 0.28% to 1%), a much higher drive current can be applied to achieve a much higher brightness (maximum brightness ∼10,000 cd/m2 at 1000 mA/cm2), and the forward-to-reverse bias rectification ratio increases by orders of magnitude (from 102 to 106-107). The lifetime of the device is also enhanced by two orders of magnitude.
Original language | English (US) |
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Pages (from-to) | 1348-1350 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 70 |
Issue number | 11 |
DOIs | |
State | Published - Mar 17 1997 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)