Improving Light Outcoupling Efficiency for OLEDs with Microlens Array Fabricated on Transparent Substrate

Table 1

Microlens arrays with different geometrical parameters.

Device	Microlens types	Radius (µm)	Gap (µm)	Hight (µm)	Contact angle (°)
1	Type 1	50 μm	5 μm	50 μm	90
2	Type 2	50 μm	5 μm	25 μm	60
3	Type 3	50 μm	5 μm	13.4 μm	30
4	Type 4	30 μm	5 μm	30 μm	90
5*	Type 5	50 μm	5 μm	50 μm	90

 *In device 5, microlens arrangement was similar to honeycomb lattice; the other four types were orthorhombic pattern.