Inserting buffer layers enhances carrier balance in OLEDs, indicating recovery of device performance.
OLEDs, containing non‐doped emissive layers as buffer layers, restored their device characteristics of red, green hyperfluorescence, and blue triplet‐triplet fusion. These features degraded owing to carriers accumulated at the heterostructures. We considered the built‐in voltage and nonradiative recombination processes as the effects of disturbing carrier balance.
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Managaki et al. (2025) studied this question.
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