Yan Yafei, Xia Kai, Gan Wei, Yang Kemeng, Li Gang, Tang Xi, Li Liang, Zhang Changjin, Fei Guang Tao, Li Hui
Institute of Physical Science and Information Technology and Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China.
University of Science and Technology of China, Hefei 230026, P. R. China.
Nanoscale. 2022 Sep 22;14(36):13187-13191. doi: 10.1039/d2nr02822k.
Two-dimensional (2D) elementary tellurium (Te) has attracted intensive attention due to its potential applications in short-wave infrared photodetector devices. Here, we report hydrothermally synthesized 2D Te nanoflakes for short-wave infrared photodetectors with high performance. A Te-based photodetector exhibits a peak responsivity of 51.85 A W at a 1550 nm wavelength, attributed to the efficient absorption of the phonons of 2D Te nanoflakes. Besides, the rising and decay time of the Te photodetector is calculated to be ∼19 μs and ∼21 μs, respectively, due to the rapid diffusion of charge carriers. In addition, Te-photodetectors exhibit a high specific detectivity (*) of 1.88 × 10 Jones and a superior external quantum efficiency (EQE) of 4148%. Our findings have demonstrated the development of high-performance short-wave infrared photodetectors with fast responses based on 2D Te nanoflakes.
二维（2D）单质碲（Te）因其在短波红外光电探测器器件中的潜在应用而备受关注。在此，我们报道了通过水热法合成的用于高性能短波红外光电探测器的二维碲纳米片。基于碲的光电探测器在1550 nm波长处表现出51.85 A/W的峰值响应率，这归因于二维碲纳米片对声子的有效吸收。此外，由于载流子的快速扩散，碲光电探测器的上升时间和衰减时间分别计算为19 μs和21 μs。此外，碲光电探测器表现出1.88×10琼斯的高比探测率（*）和4148%的优异外量子效率（EQE）。我们的研究结果证明了基于二维碲纳米片的具有快速响应的高性能短波红外光电探测器的发展。
