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(a) Schematic diagram of heterostructure LED. (b) Current-voltage characteristic of the diode. The inset shows the current-voltage characteristics of In and Ag Ohmic contacts to and , respectively.
The RT EL spectra of and heterojunction LEDs. (a) EL spectra under different bias for heterojunction LED. (b) EL spectra of both heterojunction LEDs under the same bias voltage of 3.5 V. The inset shows the intensity of UV emission peaks for and heterojunction LEDs as a function of bias voltage.
The energy band diagrams of heterojunctions. (a) The equilibrium condition of heterojunction. (b) The energy band diagram of the heterojunction LED under positive bias at side.
The curves of output power vs input power for and heterojunction LEDs.
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