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(Color online) Schematic diagram of the ZnO homojunction light-emitting diode.
(Color online) XPS spectra of As core level for ZnO samples. Sample A, ZnO deposited at ; sample B, ZnO deposited at without annealing; sample C, ZnO deposited at then annealing in oxygen at .
(Color online) curve of the ZnO device. (a) curve of ZnO homojunction, the insert is curve of Au–Zn metal contacts on and Au–Zn on -type GaAs. (b) curve of structure.
(Color online) (a) Room temperature EL spectrum from the homojunction under forward injection current of . Inset is the corresponding EL photograph. (b) PL spectra at room temperature of undoped -type ZnO film and arsenic doped -type ZnO film.
Electrical properties of ZnO films deposited on semi-insulating GaAs substrates.
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