P‐14.6: The multilayer PE‐CVD thin film encapsulation for enhanced light extraction performance of top emission OLED

Thin film encapsulation technology (TFE) is an indispensable part of Organic Light‐Emitting Diode (OLED) display, with strict requirements for preventing the penetration of moisture and oxygen. However, the encapsulation structure located on the upper layer of OLED has an adverse effect on light transmission due to the existence of absorption loss and waveguide modes. Here, we propose a multilayer TFE structure that enhances light extraction through refractive index match. The high light extraction is attributed to the presence of evanescent waves and electric fields in the low refractive index optical adjustment layer, providing a practical solution for high‐brightness applications of OLED displays.