Abstract
A moth-eye antireflective coating (M-ARC) on the surface of a glass substrate is reported for enhanced efficiency of an organic light-emitting diode (OLED). The M-ARC reflects the light trapped in the substrate modes of the device. Fresnel’s theory was applied to study the reflection and absorption of light on the M-ARC. The effect of the M-ARC on the OLED for light out-coupling efficiency was analyzed using the finite-difference time-domain method. The improvement in light extraction efficiency of the OLED was optimized by investigating the parameters of pitch, thickness, refractive indices, and height of the M-ARC. The enhancement in peak extraction efficiency of the moth-eye-based OLED as a function of wavelength is ∼3.0 compared to conventional OLEDs.
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