Illuminating the Future: Luminescent Organic Materials and Perovskite Quantum Dots for Rare-Earth-Free Human-Centric Lighting

In pursuit of efficient lighting solutions, scientists and engineers have long relied on rare-earth elements to create the vibrant LED displays and bright LED lights that power our devices and illuminate our homes. However, the environmental impact and scarcity of these materials have prompted a search for alternatives. Against this backdrop, luminescent organic materials and perovskite quantum dots emerge as a groundbreaking development poised to revolutionize the world of white light-emitting diodes (WLEDs). This study introduces an innovative hybrid approach for the fabrication of high-quality, rare-earth-free WLEDs. By synergizing organic materials with perovskite quantum dots, we have developed WLEDs that not only bypass the need for rare-earth elements but also offer a customizable light spectrum and tunable correlated color temperature (CCT), making them ideal for human-centric lighting (HCL) applications. Moreover, they maintain high color rendering index (CRI) values. Specifically, our WLEDs achieve CCT values ranging from 3705 K to 8238 K, with CRI values exceeding 85 in optimal configurations. To our knowledge, this is the first demonstration of such a hybrid methodology's potential and advantages, marking a significant step forward in the development of sustainable, rare-earth-free human-centric lighting solutions.