Nanoparticle-Doped Polydimethylsiloxane Fluid Enhances the Optical Performance of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes

Table 1 Materials and characteristics of DUV-LED

Component	Characteristics	Material
DUV-LED	Peak wavelength = 275 nm	AlGaN
Nanoparticles	Average primary particle size = 14 nm Refractive index (n) = 1.45 Energy gap (Eg) = 9 eV	SiO₂
Tilt angle reflector sidewall cavity	Tilt angle = 60° Diameter = 2 mm	Aluminum
Hemispherical Quartz glass	Diameter = 4 mm High = 1.3 mm	Quartz
Encapsulation structure	Polished	Al₂O₃ ceramics
Encapsulation material	Refractive index (n) = 1.45	Polydimethylsiloxane fluid