Table 4 Summary of optical properties of different substrates

From: Innovative stress-release method for low-stress flexible Al2O3 encapsulation films in OLED applications

Substrate

Equivalent refractive index

Transmission coefficient (%)

Critical angle (°)

50 °C wrinkle film

1.30

0.870

50.3

45 °C wrinkle film

1.33

0.858

48.8

40 °C wrinkle film

1.36

0.847

47.3

35 °C wrinkle film

1.38

0.840

46.4

RT wrinkle film

1.40

0.833

45.6

Glass

1.50

0.800

41.8

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