Preparation and characterization of Cu:Co 3 O 4 /Si heterojunction prepared by spray pyrolysis
| Autor: | Azhar I. Hassan, Sahar I. Maki |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Spinel Analytical chemistry chemistry.chemical_element Heterojunction 02 engineering and technology Substrate (electronics) engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Copper Grain size chemistry Phase (matter) 0103 physical sciences engineering Thin film 0210 nano-technology Cobalt oxide |
| Zdroj: | Energy Procedia. 119:961-971 |
| ISSN: | 1876-6102 |
| DOI: | 10.1016/j.egypro.2017.07.129 |
| Popis: | Undoped and Cu doped cobalt oxide thin films with (x= 1, 3, 5, 7, and 9)% were prepared by spray pyrolysis at substrate temperature (350)°C. Structural and optoelectronic properties of thin films were studied by X-ray diffraction XRD, Atomic Force Microscope AFM, current- voltage (I-V) and capacitance- voltage (C-V) measurement. X-ray diffraction results revealed that all films consist of single Co 3 O 4 phase with preferred orientation (111) and cubic spinel structure. AFM micrographs indicated that the grain size decrease with increasing Cu doping. Current transport properties of the p-Cu:Co 3 O 4 /n-Si heterojunctions are investigated by current–voltage measurements in dark and illumination with different incident power. The ideality factor were found to be strongly depending on Cu doping, there is an increase in the ideality factor with increasing Cu doping. In part of C-V measurements, built-in potential value were found to decrease with increasing of Cu. The higher spectral responsivity of the junction was 54 A/W at (600-700) nm wavelength for copper ratio 9%. |
| Databáze: | OpenAIRE |
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