Experiments reveal optimal capping layer thickness of 40 nm improves white efficiency, reducing reflectance in OLEDs.
In this study, we conducted experiments to investigate the effects of varying thicknesses of capping layer (CPL) on OLED cathode with the aim of reducing power consumption by lowering reflectance and improving white efficiency. The optimal CPL thickness for improving white efficiency is found to be 40 nm, balancing both reflectance reduction and white efficiency improvement.
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Chung et al. (2025) studied this question.
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