UV Light

 

• UV-A is safer than UV-B and UV-C

Semiconductor Material in Generating the Wavelength

	Si	GaAs	4H-SiC	GaN	ZnO	β-Ga2O3	Diamond
Bandgap (eV)	1.12	1.4	3.2	3.39	3.4	4.8–4.9	5.6
Band structure	Indirect transition	Direct transition	Indirect transition	Direct transition	Direct transition	Direct or indirect transition5,6)
Electron mobility (cm2 V−1 s−1)	1,450	8,500	950	2,000	300	3007)	4,000
Hole mobility (cm2 V−1 s−1)	450	400	115	350			3,800
Breakdown electric field (MV/cm)	0.3	0.4	3	5		87)	10
Thermal conductivity (W/cmK)	1.3	0.54	5	1.3	~13)	~0.28)	20
Electron saturation velocity (cm/s)	1 × 107	2 × 107	2 × 107	2 × 107	3.0 × 107 4)		3 × 107
Relative permitivity	11.7	12.9	10	8.9	~83)	10	5.7

SPD Chart

Note on Mosquito Killer

• It is said that only 368 nm light works in attracting the mosquito
• However, generally all light might have tendency to attracts the mosquito however might depends on their species