A novel use of magneto-electroluminescence (MEL) is reported to discern the delayed fluorescence coming from reverse intersystem crossing (RISC) or triplet–triplet annihilation (TTA). The results indicate MEL could be used as a “fingerprinting” technique to exploit the phenomena behind highly efficient fluorescent OLEDs with quantum efficiencies exceeding the 25% theoretical limit.
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Chen et al. (2014) studied this question.
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