PL spectra of the quantum-well structures with one, three, five, and ten periods, measured under an excitation of at room temperature.
An high-resolution XRD scan of the ten-period MQW structure. The experimental curve and the simulated curve based on the dynamic theory are given.
Temperature-dependent PL spectra of the SQW structure. The dots are guides for the eye.
Temperature-dependent PL spectra of the MQW structure. The dots are guides for the eye.
Variation of emission energy of the SQW and ten-period MQW structures as a function of temperature. Both show a clear temperature-induced blueshift between 70 and .
(a) the typical electroluminescence spectra of both LEDs under injection current and (b) the optical power of the SQW and MQW UV-LEDs as a function of injection current.
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