TY  - JOUR
AU  - Liu, Gaochao
AU  - Zhang, Shuai
AU  - Wang, Yuzhen
AU  - Xia, Zhiguo
PY  - 2026
TI  - Integrated NIR-Ⅱ light sources via Cr4+-doped wafer-scale composite ceramics for enhanced image sensing
JO  - Journal of Materiomics
SN  - 2352-8478
VL  - 12
IS  - 3
AB  - 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.
UR  - https://doi.org/10.1016/j.jmat.2026.101199
DO  - 10.1016/j.jmat.2026.101199