Improvement of n-ZnO/p-Si photodiodes by embedding of silver nanoparticles
| Autor: | Zhan Shuo Hu, Bohr-Ran Huang, Wei Yang Chou, Kuan Jen Chen, Fei Yi Hung, Shoou-Jinn Chang, Bo Cheng Lin, Yi Wei Tseng, Jay Chang |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Silicon business.industry Photodetector chemistry.chemical_element Bioengineering Heterojunction General Chemistry Thermal treatment Condensed Matter Physics Atomic and Molecular Physics and Optics Light scattering Silver nanoparticle Photodiode law.invention chemistry law Modeling and Simulation Optoelectronics General Materials Science business Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Nanoparticle Research. 13:4757-4763 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-011-0446-4 |
| Popis: | The photo-current of n-ZnO/p-Si heterojunction photodiodes was improved by embedding Ag nanoparticles in the interface (ZnO/nano-PAg/p-Si), and the ratio between photo- and dark-current increased by about three orders more than that of a n-ZnO/p-Si specimen. The improvement in the photo-current resulted from the light scattering of embedded Ag nanoparticles. The I–V curve of n-ZnO/p-Si degraded after thermal treatment (A-ZnO/p-Si) because the silicon robbed the oxygen from ZnO to form amorphous silicon dioxide and left an oxygen vacancy. Notably, the properties of ZnO/nano-PAg/p-Si were better in the time-dependent photoresponse under 10 V bias. Ag nanoparticles (15–20 nm) scattered the UV light randomly and increased the probability for the absorption of ZnO to enhance the properties of the photodiode. |
| Databáze: | OpenAIRE |
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