Enhanced Stability and Brightness through Co‐Substitution: Promoting Plant Growth with Green‐Excited Deep Red Phosphor Ca1‐zSrzLi1‐xMg2xAl3‐xN4:yEu2+

(CLA-0.4M-0.8S) prepared light-converting film, which is mainly excited by green light, demonstrated a 20% increase in optical density of Chlorella compared to the PP film and a remarkable 97.5% increase compared to the control group without any film. These findings suggest that this film has significant potential for applications in outdoor agriculture and other fields.