Effect of MgO Surface Modification on the TiO2 Nanowires Electrode for Self-Powered UV Photodetectors
| Autor: | Liancheng Zhao, Lingping Kong, Dongbo Wang, Shiming Ni, ChengCheng Zhang, Yong Zhang, Z. Li, Gang Liu, Zhikun Xu, Qingjiang Yu, Jinzhong Wang, Fengyun Guo, Jiawei Luo, Shujie Jiao, Bao Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Photocurrent
Nanostructure Materials science Renewable Energy Sustainability and the Environment business.industry General Chemical Engineering Nanowire Photodetector 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Responsivity Coating Electrode engineering Environmental Chemistry Optoelectronics Surface modification 0210 nano-technology business |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:7265-7272 |
| ISSN: | 2168-0485 |
| Popis: | TiO2-based core–shell structure has gained enormous significance and has developed as a promising candidate in photoelectrochemical (PEC) devices due to its excellent properties. Despite studies, the surface/interface chemistry in these nanostructures has not been fully understood and there is still much room to further improve the performance of related PEC devices. Here, using a closely integrated experimental investigation and mechanism analysis, we scrutinized the intrinsic role of the MgO coating in the photocurrent enhancement of TiO2@MgO core–shell structured UVPDs. We evidenced that after coating with MgO, the photocurrent of UVPDs has been significantly enhanced and the optimal coating time was found to be 45 min. A large responsivity of 365 mA W–1 at 360 nm and a simultaneously excellent on/off ratio of 16 739 are achieved, which have rarely reported previously. In addition, the structure–property relationships are well established in all studied UVPDs through comparing investigations. The super... |
| Databáze: | OpenAIRE |
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