@article{Zhu2024, 
author = {Menglei Zhu and Kunxuan Liu and Di Wu and Yunrui Jiang and Xue Li and Pei Lin and Zhifeng Shi and Xinjian Li and Ran Ding and Yalun Tang and Xuechao Yu and Longhui Zeng},
title = {In-situ fabrication of on-chip 1T'-MoTe2/Ge Schottky junction photodetector for self-powered broadband infrared imaging and position sensing},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {6},
pages = {5587-5594},
keywords = {imaging, Schottky junction, MoTe2, broadband photodetection, position sensitive detector},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6510-z},
doi = {10.1007/s12274-024-6510-z},
abstract = {High-sensitivity room-temperature multi-dimensional infrared (IR) detection is crucial for military and civilian purposes. Recently, the gapless electronic structures and unique optoelectrical properties have made the two-dimensional (2D) topological semimetals promising candidates for the realization of multifunctional optoelectronic devices. Here, we demonstrated the in-situ construction of high-performance 1T’-MoTe2/Ge Schottky junction device by inserting an ultrathin AlOx passivation layer. The good detection performance with an ultra-broadband detection wavelength range of up to 10.6 micron, an ultrafast response time of ~ 160 ns, and a large specific detectivity of over 109 Jones in mid-infrared (MIR) range surpasses that of most 2D materials-based IR sensors, approaching the performance of commercial IR photodiodes. The on-chip integrated device arrays with 64 functional detectors feature high-resolution imaging capability at room temperature. All these outstanding detection features have enabled the demonstration of position-sensitive detection applications. It demonstrates an exceptional position sensitivity of 14.9 mV/mm, an outstanding nonlinearity of 6.44%, and commendable trajectory tracking and optoelectronic demodulation capabilities. This study not only offers a promising route towards room-temperature MIR optoelectronic applications, but also demonstrates a great potential for application in optical sensing systems.}
}