Journal
ORGANIC AND HYBRID LIGHT EMITTING MATERIALS AND DEVICES XXIII
Volume 11093, Issue -, Pages -Publisher
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2528780
Keywords
OLED; bimolecular quenching; triplet-polaron quenching; operational lifetime; photoluminescence; phosphorescence
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Funding
- DuPont Electronics and Imaging
- National Science Foundation Graduate Research Fellowship [00039202]
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Efficiency roll-off and intrinsic luminance degradation are two of the primary limitations of organic light-emitting devices (OLEDs). While both phenomena have been studied separately in detail, they are rarely considered together. Previous analyses of OLED degradation have largely neglected changes in efficiency roll-off and bimolecular quenching, and the magnitude of these changes and their impact on device lifetime remains unclear. We present experimental and modeling results to quantify the magnitude of these changes, which we find range from similar to 2% to above 10% in magnitude and increase in importance at high brightness or in devices with significant exciton-exciton annihilation.
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