@article{Liu2025, 
author = {Xiaoyan Liu and Changyi Pan and Sheng Ni and Shian Mi and Xuhao Fan and Changlong Liu and Tianning Zhang and Yufeng Shan and Jiaqi Zhu and Shaowen Xu and Wanli Yang and Chixian Liu and Tianye Chen and Huiyong Deng and Ning Dai},
title = {Controllable polarity photoresponse and imaging based on MoS₂/MLG/MoTe₂ heterostructure},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {8},
pages = {94907489},
keywords = {controllable, graphene-intercalated, spatially resolved photocurrent, polarity photoresponse, MoS2/MLG/MoTe2 heterostructure},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907489},
doi = {10.26599/NR.2025.94907489},
abstract = {The realization of controllable polarity photoresponse within a single device is a crucial advancement for simulating biological bipolar vision cells to drive the development of next-generation optoelectronic technologies. Nevertheless, current polarity photodetectors face significant challenges in fully suppressing symmetric photocurrent cancellation and optimizing carrier transport efficiency. Here, we propose a graphene-intercalated MoS2/MoTe2 heterojunction, featuring a tailorable built-in electric field and a high efficiency transport channel. Spatially resolved photocurrent reveals that the controllable polarity photoresponse originates from the bias-dependent equivalent built-in electric field of MoS2/MLG/MoTe2 heterojunction. The controllable polarity photoresponse realizes a large-area uniform “heart-shaped” photocurrent region. In enhanced polarity photoresponse mode, the photodetector exhibits broadband detection capabilities from visible (638 nm) to infrared (1550 nm) light, achieving a high responsivity of 18.1 A/W and an excellent detectivity of 2.8 × 1012 Jones, as well as fast response times of 94/119 µs. Furthermore, precise imaging with a resolution better than 0.5 mm was successfully demonstrated, highlighting its polarity photoresponse for practical imaging applications. This work provides a new paradigm for controllable polarity photoresponse programmed by intercalated low-dimensional material structures, paving the way for next-generation intelligent sensing chips.}
}