@article{Shang2026, 
author = {Xingbo Shang and Maohua Chen and Yiye Yu and Tiange Zhao and Yuzhuo Bai and Shikun Duan and Haonan Ge and Zhen Wang and Longhui Zeng and Di Wu},
title = {In-situ grown 1D Te/2D Bi2O2Se van der Waals heterostructure for high-performance self-powered polarization-sensitive photodetection},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {9},
pages = {94908666},
keywords = {tellurium, bismuth selenide, chemical vapor deposition, heterojunction, polarization-sensitive photodetector, self-power},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908666},
doi = {10.26599/NR.2026.94908666},
abstract = {In recent years, low-dimensional semiconductors have attracted widespread attention in the field of next-generation broadband infrared photodetectors due to their tunable band structures, strong light-matter interactions, and compatibility with mixed-dimensional integration. Among them, tellurium (Te) and bismuth selenide (Bi2O2Se) have become ideal candidate materials for high-performance detection due to their inherent anisotropy, high carrier mobility, and broad spectral response. Constructing heterojunction photodetectors based on these materials can achieve self-powered operation and suppress dark current. Heterojunction interface engineering and band structure design capabilities are crucial for constructing high-performance Te/Bi2O2Se heterojunction photodetectors. Therefore, we in-situ construct a one-dimensional (1D) Te/two-dimensional (2D) Bi2O2Se heterojunction by a two-step chemical vapor deposition method, which shown a clear interface and type-II band alignment structure. Therefore, the photodetector based on Te/Bi2O2Se heterojunction working in self-driven mode exhibits high performance, showing a high responsivity of ~ 0.89 A·W−1 and a fast response time of ~ 29/41 μs under 1550 nm light irradiation. Further, owing to the optical absorption anisotropy of tellurium, the device exhibited a high polarization ratio of 2.8 and successfully demonstrated polarization optical communication and polarization imaging applications. This work provides new ideas for the in-situ construction strategy of high-quality mixed-dimensional van der Waals heterojunctions and the research on high-performance photodetectors and their applications.}
}