Improvement of Heterojunction Nanomaterials Photoelectrochemical Properties by Sol-Gel Synthesis and Hydrothermal Reaction
| Autor: | Yannan Mu, Qingfeng Zhang, YanQiang Cheng, Yan Wen, Lecheng Tian, Chuanmin Zhang, Dan Dan Han, Juan Ding |
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| Rok vydání: | 2018 |
| Předmět: |
Photocurrent
Materials science Nanostructure Biomedical Engineering Bioengineering Heterojunction 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation 0104 chemical sciences Nanomaterials Light intensity Delafossite Chemical engineering engineering General Materials Science Nanorod 0210 nano-technology |
| Zdroj: | Journal of nanoscience and nanotechnology. 18(10) |
| ISSN: | 1533-4880 |
| Popis: | The ZnO nanorod arrays (NRs)/CuAlO2 laminar crystal thin films (LFs)/Ni heterojunctions with delafossite structure were prepared by sol-gel synthesis for LFs and hydrothermal for NRs. X-ray diffraction analysis demonstrates the typical delafossite structure CuAlO2 and pure ZnO of R¯3m space group. Compared with a traditional CuAlO2/Ni laminar films (LFs) nanostructure, the photocurrent of this heterojunction nanostructure is significantly increased. Note that a significant blue-shift of the absorption edge and a favorable forward current to reverse current ratio at applied voltages of -0.75 to +2 V were observed in this heterojunction with the increase of Zn2+ ion concentration in the hydrothermal reaction. Moreover, the photoelectrochemical characteristics recorded under AM 1.5 illumination with 100 mW/cm2 light intensity at 0 V (vs. Ag/AgCl), while the highest photocurrent density arrive at 3.59 mA/cm2. This study demonstrates that heterojuction nanostructure, which is easily adapted to other chemical systems, is a promising technique for improving photoelectro-chemical properties of low-cost solar cells. |
| Databáze: | OpenAIRE |
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