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We have investigated the buffer layer effect in the auxiliary electrode on the lifetime and stable operation of large-area organic light-emitting diodes (OLEDs). A 2-nm-thick Al2O3 layer was introduced between the Mo and Al in a conventional Mo–Al–Mo metal auxiliary electrode structure. The structure of the buffer layer inserted auxiliary electrode is Mo–Al–Al2O3–Al–Al2O3–Al–Mo. By introducing the...
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