Which mechanism limits the efficiency of organic LED (OLED) displays composed of complex fluorescent molecules?

💡 Explanation

When excited, fluorescent molecules in OLEDs can form both singlet and triplet excitons, but only singlet excitons readily decay emitting light; triplet excitons undergo intersystem crossing, quenching the fluorescence. Therefore exciton quenching greatly reduces efficiency, rather than dielectric breakdown, corrosion or delamination which arise from unrelated mechanisms or degradation modes.

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