Light Guide Layer Thickness Optimization for Enhancement of the Light Extraction Efficiency of Ultraviolet Light–Emitting Diodes

Table 1 UV-C LED chip simulation set parameters

Item	Characteristics	Value
Input power	Radiant flux	1 W
Wavelength	Polished	275 nm
Light guide layer (LGL)	Polished	Thickness: H_LG = 150 µm–700 µm Refractive index: N_LGL = 1.782,
Light emitting layer(LEL)	Polished	Thickness: H_LE = 1.5 um Refractive index: N_LEL = 1.782
P/N electrode layer	Cr/Au/Sn	Thickness: Hpd = 1.5 um