Researchers demonstrate single organic crystal emitting red light from UV and green from near-IR simultaneously

https://phys.org/news/2026-02-crystal-emitting-red-uv-green.html

"precisely controlling molecular arrangement/ rigid crystal packing π-conjugated organic compound featuring 1,2,5-thiadiazole-substituted pyrazine unit... red fluorescence/ green 2nd harmonic generation operate independently without interference... organic crystals lightweight, chemically tunable, flexible, easier to process... future: advanced optical sensors, medical imaging systems, and next-generation photonic devices that can sense invisible wavelengths using simpler, more adaptable materials"