Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors
Zinc oxide nanoparticles (ZnO NPs), copper oxide nanoparticles (CuO NPs) and CuO@ZnO NPs as a colloidal core-shell solution were synthesized by laser ablation. A Nd:YAG laser with an energy of 700 mJ, a wavelength of 1064 nm and 200 pulses was used for the ablation process. The colloidal solution wa...
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University of Technology, Baghdad
2024-12-01
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| Series: | Journal of Applied Sciences and Nanotechnology |
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| Online Access: | https://jasn.uotechnology.edu.iq/article_24386_bc525d9cfbc441061c3abe7846001ae9.pdf |
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| author | Salah Abdul Aziz Uday Nayef Mohammed Rasheed |
| author_facet | Salah Abdul Aziz Uday Nayef Mohammed Rasheed |
| author_sort | Salah Abdul Aziz |
| collection | DOAJ |
| description | Zinc oxide nanoparticles (ZnO NPs), copper oxide nanoparticles (CuO NPs) and CuO@ZnO NPs as a colloidal core-shell solution were synthesized by laser ablation. A Nd:YAG laser with an energy of 700 mJ, a wavelength of 1064 nm and 200 pulses was used for the ablation process. The colloidal solution was deposited on porous silicon (PSi) using the drop-casting method. The PSi substrates were prepared by photoelectrochemical etching (PECE) on n-type (111) silicon wafers. The study investigated the influence on the electrical, optical, morphological and structural properties of the CuO NPs and ZnO NPs samples when they were converted into a core-shell, specifically for their use in photodetector applications. XRD analysis revealed the presence of CuO, ZnO and CuO@ZnO by diffraction peaks at different angles. According to the SEM images, the nanoparticles show randomly distributed spherical grains, while PSi exhibits a sponge-like structure. The core-shell shape is confirmed by TEM images, which show a dark inner region consisting of CuO NPs and a much lighter outer region consisting of the ZnO nanoshell. The optical properties of the CuO@ZnO NPs were investigated and a minimum energy gap of 2.8 eV was found. The CuO@ZnO NPs/PSi/n-Si photodetector showed improved current-voltage (J-V) characteristics, rectifying properties and remarkable sensitivity in the visible to near-infrared region compared to other photodetector samples. The fabricated photodetector confirmed improved quantum performance, especially in the visible spectrum. The work aims to synthesize CuO@ZnO core-shell nanoparticles by a laser ablation technique to improve the electrical properties and spectral response of photodetectors. |
| format | Article |
| id | doaj-art-8071bcd08a8d4cdaa3e4120913df97b4 |
| institution | Kabale University |
| issn | 2788-6867 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | University of Technology, Baghdad |
| record_format | Article |
| series | Journal of Applied Sciences and Nanotechnology |
| spelling | doaj-art-8071bcd08a8d4cdaa3e4120913df97b42024-12-10T07:31:53ZengUniversity of Technology, BaghdadJournal of Applied Sciences and Nanotechnology2788-68672024-12-0144627610.53293/jasn.2024.7496.132024386Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of PhotodetectorsSalah Abdul Aziz0Uday Nayef1Mohammed Rasheed2Sumer University-Department of Science, Dhi Qar, IraqDepartment of Applied Sciences, University of Technology - Iraq, IraqDepartment of Applied Sciences, University of Technology - Iraq, IraqZinc oxide nanoparticles (ZnO NPs), copper oxide nanoparticles (CuO NPs) and CuO@ZnO NPs as a colloidal core-shell solution were synthesized by laser ablation. A Nd:YAG laser with an energy of 700 mJ, a wavelength of 1064 nm and 200 pulses was used for the ablation process. The colloidal solution was deposited on porous silicon (PSi) using the drop-casting method. The PSi substrates were prepared by photoelectrochemical etching (PECE) on n-type (111) silicon wafers. The study investigated the influence on the electrical, optical, morphological and structural properties of the CuO NPs and ZnO NPs samples when they were converted into a core-shell, specifically for their use in photodetector applications. XRD analysis revealed the presence of CuO, ZnO and CuO@ZnO by diffraction peaks at different angles. According to the SEM images, the nanoparticles show randomly distributed spherical grains, while PSi exhibits a sponge-like structure. The core-shell shape is confirmed by TEM images, which show a dark inner region consisting of CuO NPs and a much lighter outer region consisting of the ZnO nanoshell. The optical properties of the CuO@ZnO NPs were investigated and a minimum energy gap of 2.8 eV was found. The CuO@ZnO NPs/PSi/n-Si photodetector showed improved current-voltage (J-V) characteristics, rectifying properties and remarkable sensitivity in the visible to near-infrared region compared to other photodetector samples. The fabricated photodetector confirmed improved quantum performance, especially in the visible spectrum. The work aims to synthesize CuO@ZnO core-shell nanoparticles by a laser ablation technique to improve the electrical properties and spectral response of photodetectors.https://jasn.uotechnology.edu.iq/article_24386_bc525d9cfbc441061c3abe7846001ae9.pdfcuo@zno core-shelllaser ablationporous siliconcolloidal solutionphotodetectors |
| spellingShingle | Salah Abdul Aziz Uday Nayef Mohammed Rasheed Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors Journal of Applied Sciences and Nanotechnology cuo@zno core-shell laser ablation porous silicon colloidal solution photodetectors |
| title | Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors |
| title_full | Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors |
| title_fullStr | Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors |
| title_full_unstemmed | Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors |
| title_short | Manufacturing of CuO@ZnO Nanoparticles Core-Shell for Enhancing Electrical Properties and Spectral Responsivity of Photodetectors |
| title_sort | manufacturing of cuo zno nanoparticles core shell for enhancing electrical properties and spectral responsivity of photodetectors |
| topic | cuo@zno core-shell laser ablation porous silicon colloidal solution photodetectors |
| url | https://jasn.uotechnology.edu.iq/article_24386_bc525d9cfbc441061c3abe7846001ae9.pdf |
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