太赫兹辐射
光谱学
载流子
材料科学
太赫兹光谱与技术
光电子学
分析化学(期刊)
纳米技术
化学
物理
量子力学
色谱法
作者
Enen Li,Jincheng Wei,Tianyu Zhang,Hujie Wan,Yan Cheng,Jiafeng Xie,J. Li,Kai Zhang,Jing‐Yin Xu,Jiangsheng Hu,Qiye Wen,Xu Xiao,Tao Zhao,Min Hu,Fuhai Su,Tianwu Wang,Guangyou Fang
出处
期刊:Small
[Wiley]
日期:2023-12-01
标识
DOI:10.1002/smll.202306200
摘要
The transport properties of charge carriers in MXene, a promising material, have been studied using terahertz time-domain spectroscopy (THz-TDS) to examine its potential applications in optical and electronic devices. However, previous studies have been limited by narrow frequency ranges, which have hindered the understanding of the intrinsic mechanisms of carrier transport in MXenes. To address this issue, ultrabroadband THz-TDS with frequencies of up to 15 THz to investigate the complex photoconductances of MXene (Ti3 C2 Tx ) films with different thicknesses are employed. The findings indicate that the electronic localization is substrate-dependent, and this effect decreases with an increase in the number of layers. This is attributed to the screening effect of the high carrier density in Ti3 C2 Tx . Additionally, the layer-independent photocarrier relaxations revealed by optical pump THz probe spectroscopy (OPTP) provide evidence of the carrier heating-induced screening effect. These results are significant for practical applications in both scientific research and various industries.
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