Free-standing ZnO nanorod arrays modified with single-walled carbon nanotubes for betavoltaics and photovoltaics
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第19期
论文作者：Changsong Chen Jiang Chen Zhen Wang Jian Zhang Haisheng San Shichao Liu Chunyu Wu Werner Hofmann
文章页码：48 - 57
摘 要：A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor microsystem. Here,we report a novel beta/photovoltaic cell based on free-standing Zn O nanorod arrays（ZNRAs） modified with metallic single-walled carbon nanotubes（m-SWCNTs）, using radioisotope63 Ni as beta-emitting source. The ZNRAs were grown on Al-doped Zn O（AZO） conductive glass using hydrothermal method.The optimum length and diameter of Zn O nanorods were determined by Monte Carlo simulation for beta energy deposition in ZNRAs. The m-SWCNTs were anchored into the ZNRAs to form a three-dimensional（3-D） Schottky junction structure for effectively separating the beta/photo-excited electron-hole pairs.Experimentally, the betavoltaic and photovoltaic effects were confirmed through the I–V measurements of beta/photovoltaic cells under beta/UV/Vis irradiations, respectively. It is suggested that the m-SWCNTs play key role for the enhancement of beta/photovoltaic performance through the formation of extensive3-D Schottky junction, the conductive network for hole transport, and the surface plasmon resonance exciton absorption for visible light.
Changsong Chen1,2,3，Jiang Chen1,2，Zhen Wang1,2，Jian Zhang4，Haisheng San1,2，Shichao Liu5，Chunyu Wu5，Werner Hofmann1,3
1. Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University2. Shenzhen Research Institute of Xiamen University3. Institute of Solid State Physics, Technical University of Berlin4. College of Energy, Xiamen University5. Shanghai Institute of Space Power-Sources
摘 要：A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor microsystem. Here,we report a novel beta/photovoltaic cell based on free-standing Zn O nanorod arrays（ZNRAs） modified with metallic single-walled carbon nanotubes（m-SWCNTs）, using radioisotope63 Ni as beta-emitting source. The ZNRAs were grown on Al-doped Zn O（AZO） conductive glass using hydrothermal method.The optimum length and diameter of Zn O nanorods were determined by Monte Carlo simulation for beta energy deposition in ZNRAs. The m-SWCNTs were anchored into the ZNRAs to form a three-dimensional（3-D） Schottky junction structure for effectively separating the beta/photo-excited electron-hole pairs.Experimentally, the betavoltaic and photovoltaic effects were confirmed through the I–V measurements of beta/photovoltaic cells under beta/UV/Vis irradiations, respectively. It is suggested that the m-SWCNTs play key role for the enhancement of beta/photovoltaic performance through the formation of extensive3-D Schottky junction, the conductive network for hole transport, and the surface plasmon resonance exciton absorption for visible light.
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