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首页> 外文会议>Asian Thermal Spray Conference >Synergistic effects of high temperature and impact compaction on the electron transport property of vacuum cold-sprayed nano-TiO_2 film
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Synergistic effects of high temperature and impact compaction on the electron transport property of vacuum cold-sprayed nano-TiO_2 film

机译：高温和冲击压实对真空冷喷涂纳米TiO_2薄膜电子传输性能的协同作用

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The nano-particle connection and electron transport property of the nano-porous TiO_2 film in photoanode determine the photovoltaic performance of dye-sensitized solar cells. It was reported that either annealing or mechanical pressing can improve the nano-particle connection and electron transport property. However, it was unexpectedly found that the electron transport property was decreased, rather than increased, by using both annealing and pressing in sequence. In this study, nano-TiO_2 films were deposited using in-situ substrate heating and in-situ particle heating approaches through vacuum cold spray, which accelerates the powder to impact on substrate surface and forms a film. The effects of high temperature and impact compaction on electron transport property was investigated to understand the significant improvement of nano-particle connection. Results show that the electron transport property in TiO_2 film was improved more significantly by in-situ particle and substrate heating than by conventional post-sintering of TiO_2 film. This suggests the existence of synergistic effects of high temperature and impact compaction on the nano-TiO_2 film during vacuum cold spray. Furthermore, due to the ability of retaining substrate at a low temperature, in-situ particle heating approach can be applied to deposit TiO_2 film for plastic-based flexible solar cells, presenting a high efficiency of 4.4%.
机译：光电码中纳米多孔TiO_2薄膜的纳米颗粒连接和电子传输性确定染料敏化太阳能电池的光伏性能。据报道，退火或机械压制可以改善纳米颗粒连接和电子传输性能。然而，意外地发现，通过使用退火和按顺序按压，电子传输性能降低而不是增加。在该研究中，使用原位衬底加热和原位颗粒加热方法沉积纳米TiO_2薄膜，通过真空冷喷雾，其加速粉末对基板表面的影响并形成薄膜。研究了高温和冲击压实对电子传输性的影响，了解纳米粒子连接的显着改善。结果表明，原位颗粒和基材加热比通过常规的TiO_2膜的烧结更显着地提高了TiO_2膜中的电子传输性能。这表明在真空冷雾期间纳米TiO_2膜上的高温和冲击压实的协同作用存在。此外，由于在低温下保持基材的能力，可以施加原位颗粒加热方法以沉积基于塑料的柔性太阳能电池的TiO_2膜，呈现为4.4％的高效率。

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