How temperature changes light: New model could guide smarter LEDs, sensors and photonic devices

Researchers at the Technion – Israel Institute of Technology have published a groundbreaking physical model in the journal Optica, detailing for the first time how a material’s fundamental light-emitting properties—specifically absorption, emission, and quantum efficiency—are comprehensively altered by temperature. This model explains how the color, intensity, and randomness of emitted light fundamentally change based on both the radiating material inherent characteristics and its thermal state. This discovery is crucial because it provides the foundational understanding necessary to precisely control light at a micro-level, bridging a critical knowledge gap in materials science that previously relied heavily on empirical observation. Its implications extend to designing more efficient LEDs and advanced optical sensors, particularly in environments where temperature fluctuations are common, ultimately enabling the creation of smarter, more robust photonic devices for diverse applications from imaging to communications.