@article{Wei2026, 
author = {Yuehua Wei and Xiangyuan Li and Jun Zhou and Feng Hu and Dongkai Dai and Jiaxing Zheng and Wenfeng Tan and Yingwei Zhao and Wei Luo and Gang Peng and Shiqiao Qin and Bei Zhao},
title = {Ultraclean CrOCl/bilayer graphene heterointerfaces enable enhanced electrical modulation},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {8},
pages = {94908726},
keywords = {polyvinyl butyral, ultraclean CrOCl/BLG heterointerfaces, one-step transfer, switching ratio},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908726},
doi = {10.26599/NR.2026.94908726},
abstract = {Layer-by-layer assembly is widely used for constructing two-dimensional van der Waals heterostructures, yet polymer-induced interfacial contamination in conventional transfer processes often limits device performance. Here, we show that ultraclean chromium oxychloride (CrOCl)/bilayer graphene (BLG) heterinterfaces, realized via a one-step transfer process, enable significantly enhanced electrical modulation. Precise control of the adhesion and release behavior of a polyvinyl butyral support effectively suppresses crack formation and minimizes interfacial residues, yielding uniform and contamination-free heterointerfaces. As a result, directly laminated CrOCl/BLG/boron nitride (BN) devices exhibit an exceptional switching ratio exceeding 108 without post-annealing, outperforming layer-by-layer assembled counterparts by nearly seven orders of magnitude. These results highlight the critical role of interface cleanliness in governing the electrical performance of bilayer graphene heterostructures and provide a robust strategy for high-performance two-dimensional hetero-integration.}
}