Ultrathin wide-bandgap niobate for high-performance photodetection and information encryption.

Authors

Xiaoqiang Feng, Xiaolin Zhang, Ran Liu, Xiaolong Guo, Yuchan Hu, Lizhikun Gong, Yiling Yu, Lei Yin, Yao Wen, Yuchen Cai, Ruiqing Cheng, Jun He

Published in

Science bulletin. Aug 24, 2026. Epub Aug 24, 2026.

Abstract

The remarkable progress in two-dimensional (2D) layered materials has spurred growing interest in extending controlled synthesis to non-layered systems. In particular, ultrathin non‑layered wide‑bandgap oxides have garnered considerable interest owing to their high ultraviolet absorption coefficient and effective spectral selectivity. However, the absence of intrinsic van der Waals gaps and the tendency toward three-dimensional nucleation make the controlled growth of ultrathin non-layered single crystals challenging. To circumvent this limitation, we report a molecular-sieve-assisted molten-salt strategy that enables the controlled fabrication of ultrathin wide-bandgap niobates. The resulting devices exhibit superior performance metrics, featuring an external quantum efficiency of 2.79 × 10³%, a specific detectivity of 1.09 × 10¹³ Jones, fast response, good operational stability, and the capability for solar‑blind imaging. Furthermore, capitalizing on the dual-wavelength photoresponse, we implement a proof-of-concept dual-wavelength physical-layer information-encoding system, demonstrating the feasibility of wavelength-multiplexed UV information transmission.

PMID:
42697824
Bibliographic data and abstract were imported from PubMed on 05 Sep 2026.

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