Thermally stable and tunable broadband near-infrared emission from NIR-I to NIR-II in Bi-doped germanate glass for smart light sources

Bi-doped germanate glasses are reported as all-inorganic tunable broadband NIR LED devices (gc-LEDs) operating in both NIR-I and NIR-II regions with potential applications in night vision, bio-imaging, and rapid analysis of food quality.