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Schematic structure of AlGaN-based 245 nm UVLED.
Charge-coupled device microscope image of monolithic array 245 nm LED device.
(a) I-V and (b) L-I characteristics and EQE of 245 and 247 nm UV LEDs in cw operation. Inset shows I-V characteristics of individual pixels and all four parallel pixels connected in parallel.
(a) EQE vs current for 245 nm DUV LEDs and (b) EQE vs square root of current density and fit with Eq. (1) for 245 and 275 nm DUV LEDs.
Spectra of 245 nm UVLEDs as a function of pulse injection current density (500 ns pulses).
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