National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
Nano Lett. 2016 Feb 10;16(2):871-6. doi: 10.1021/acs.nanolett.5b03504. Epub 2016 Jan 26.
With significant progress in the past decade, semiconductor nanowires have demonstrated unique features compared to their thin film counterparts, such as enhanced light absorption, mechanical integrity and reduced therma conductivity, etc. However, technologies of semiconductor thin film still serve as foundations of several major industries, such as electronics, displays, energy, etc. A direct path to convert thin film to nanowires can build a bridge between these two and therefore facilitate the large-scale applications of nanowires. Here, we demonstrate that methylammonium lead iodide (CH3NH3PbI3) nanowires can be synthesized directly from perovskite film by a scalable conversion process. In addition, with fine kinetic control, morphologies, and diameters of these nanowires can be well-controlled. Based on these perovskite nanowires with excellent optical trapping and mechanical properties, flexible photodetectors with good sensitivity are demonstrated.
在过去十年中取得了重大进展，半导体纳米线相较于其薄膜对应物具有独特的特性，例如增强的光吸收、机械完整性和降低的热导率等。然而，半导体薄膜技术仍然是电子、显示、能源等几个主要行业的基础。将薄膜直接转化为纳米线的方法可以在这两者之间架起桥梁，从而促进纳米线的大规模应用。在这里，我们证明了可以通过可扩展的转化过程，直接从钙钛矿薄膜中合成碘化甲基铵铅（CH3NH3PbI3）纳米线。此外，通过精细的动力学控制，可以很好地控制这些纳米线的形貌和直径。基于这些具有优异光学俘获和机械性能的钙钛矿纳米线，展示了具有良好灵敏度的柔性光电探测器。
