@article{Liu2026, 
author = {Gaochao Liu and Shuai Zhang and Yuzhen Wang and Zhiguo Xia},
title = {Integrated NIR-Ⅱ light sources via Cr4+-doped wafer-scale composite ceramics for enhanced image sensing},
year = {2026},
journal = {Journal of Materiomics},
volume = {12},
number = {3},
keywords = {Near-infrared, Photoelectric detection, Laser-driven light sources, Phosphor wheel},
url = {https://www.sciopen.com/article/10.1016/j.jmat.2026.101199},
doi = {10.1016/j.jmat.2026.101199},
abstract = {Near-infrared-Ⅱ (NIR-Ⅱ) photons hold great potential in assisting non-invasive imaging and optical signal sensing. However, the integration of broadband NIR-Ⅱ light sources with photodetectors to improve the imaging sensitivity and spatial resolution is highly demanded. Herein, we have developed MgO–Li2SrGeO4:Cr4+ composite ceramics, which demonstrate a broad NIR-Ⅱ emission band centered at 1160 nm originating from spin-allowed 3T2 → 3A2 (3F) transition of Cr4+. The incorporated nano-MgO particles serve as light-guiding channels while filling the pores and prevents the reduction of Cr4+, enhancing the external quantum efficiency and thermal conductivity of the composite ceramics to 53% and 17.8 W·m−1·K−1, respectively. The dynamic wafer-scale luminescent ceramic wheel delivers a record broadband NIR-Ⅱ emission output power of 1.9 W under 20 W·mm−2 red laser excitation, which facilitates imaging sensing of commercial PbS photodetectors by enhancing their photocurrents and signal-to-noise ratios. These results establish the feasibility of high-power broadband NIR-Ⅱ light sources integrated with photodetectors, and further demonstrate the combination of intelligent algorithms toward high-resolution optical imaging.}
}