Liu Yu, Hu Qianqian, Wang Pengfei, Wei Jinquan, Huang Feng, Sun Jia-Lin
Opt Lett. 2021 Oct 15;46(20):5228-5231. doi: 10.1364/OL.441709.
Hot carriers play a significant role in applications of photovoltaics, photodetection, and photocatalysis. However, effective methods for observing the ultrafast dynamic processes of hot carriers are concentrated on the time domain, on which it is difficult and complex to operate. We propose a novel, to the best of our knowledge, and creative strategy to convert the time-domain dynamic process into a spatially thermal redistribution in suspended carbon nanotube fibers. The large average free path of photoinduced hot holes ensures a prominent offset of temperature distribution. The experimental results confirm the theory about electrically driven transport of hot holes, which has rarely been reported.
热载流子在光伏、光电探测和光催化应用中发挥着重要作用。然而，观察热载流子超快动态过程的有效方法集中在时域，在该领域操作困难且复杂。据我们所知，我们提出了一种新颖且具有创造性的策略，将时域动态过程转化为悬浮碳纳米管纤维中的空间热再分布。光致热空穴的大平均自由程确保了温度分布的显著偏移。实验结果证实了关于热空穴电驱动传输的理论，而这一理论此前鲜有报道。
