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(Color online) characteristics of heterojunctions formed by -type ZnO films grown on GaAs substrates. (a) -type GaAs and (b) -type GaAs.
(Color online) XPS spectra of of ZnO films grown on GaAs substrate.
(Color online) Room temperature EL spectra of visible light range from heterojunction under forward current of . The inset shows PL spectra of the deep-level emission in film.
(Color online) Room temperature EL spectra of infrared range from heterojunction under different forward currents of 40, 60, and . The inset shows PL spectra of different GaAs substrates (, semi-insulating GaAs, ) at room temperature.
(Color online) characteristic of the heterojunction LED. The inset shows the energy band diagram of the heterojunction at equilibrium.
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