Kagome metals AV3Sb5 (A = K, Rb, Cs) have recently emerged as a promising platform for exploring correlated and topological quantum states, yet their potential for optoelectronic applications remains largely unexplored. Here, we report high-performance photodetectors based on van der Waals KV3Sb5/WSe2 heterojunctions. A high-quality Schottky interface readily forms between KV3Sb5 and WSe2, enabling efficient separation and transport of photoinduced carriers. Under 520 nm illumination, the device achieves an open-circuit voltage up to 0.6 V, a responsivity of 809 mA/W, and a fast response time of 18.3 us. This work demonstrates the promising optoelectronic applications of Kagome metals and highlights the potential of KV3Sb5-based van der Waals heterostructures for high-performance photodetection.
@article{arxiv.2512.24229,
title = {High-Performance KV$_3$Sb$_5$/WSe$_2$ van der Waals Photodetectors},
author = {Yang Yang and Shaofeng Rao and Yuxuan Hou and Jiabo Liu and Deng Hu and Yufei Guo and Jianzhou Zhao and Hechen Ren and Zhiwei Wang and Fan Yang},
journal= {arXiv preprint arXiv:2512.24229},
year = {2026}
}