Anisotropic High Carrier Mobility in Violet Phosphorus
Violet phosphorus (VP), with its high carrier mobility, is a promising candidate for next-generation optoelectronic devices. Its anisotropic structure, polarization sensitivity, high photoelectric efficiency, and tunable bandgap enable diverse optical responses, making it ideal for applications such as photodetectors, neural networks, and multimodal systems. However, the basic anisotropic transport properties have not been experimentally revealed. Here, we report the anisotropic transport behavior of VP nanosheets using polarized transient absorption microscopy. The ambipolar mobility along the <i>a</i>-axis reaches ∼2100 cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup>, significantly higher than the <i>b</i>-axis mobility of ∼380 cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup>, yielding a diffusion anisotropy ratio of 5.5:1. Steady-state optical techniques further indicate that anisotropy in the deformation potential plays a key role in this behavior. This study clarifies the intrinsic mechanism of anisotropic carrier transport in VP and offers theoretical insight for designing angle-sensitive optoelectronic devices.
Authors
- Yiyang Gong (ORCID: https://orcid.org/0000-0002-1855-930X)
- Chuanxiu Jiang
- Yubo Tian (ORCID: https://orcid.org/0000-0002-1077-9308)
- Jinyang Zheng (ORCID: https://orcid.org/0000-0001-9647-8110)
- Shuai Yue (ORCID: https://orcid.org/0000-0003-3613-7271)
- Cong Wang (ORCID: https://orcid.org/0000-0002-3073-8853)
- Yuyang Zhang (ORCID: https://orcid.org/0000-0002-9548-0021)
- Xinfeng Liu (ORCID: https://orcid.org/0000-0002-7662-7171)
- Shaoli Wang (ORCID: https://orcid.org/0000-0003-4094-130X)
- Yangguang Zhong (ORCID: https://orcid.org/0000-0002-0871-5321)
- Xinyu Wang (ORCID: https://orcid.org/0009-0001-3927-0548)
Institutions
- Center for NanoScience (DE)
- Chinese Academy of Forestry (CN)
- National Center for Nanoscience and Technology (CN)
- Experimental Center of Forestry in North China (CN)
- University of Chinese Academy of Sciences (CN)
- Beijing University of Chemical Technology (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-08-04
- DOI
- https://doi.org/10.1021/acs.nanolett.5c03034
- Citations
- 6
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 3.11
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Young Scientists Fund
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities
- National Science Fund for Distinguished Young Scholars