Enhancing Optical and Structural Properties of Lead-Free Cesium Europium Halide Perovskite Nanocrystals via Carbon Quantum Dots

Despite the exceptional optoelectronic properties of lead-based perovskites, their toxicity remains a critical barrier for commercial applications.This study addresses this challenge by developing non-toxic CsEuCl3 nanocrystals doped with carbon quantum dots (CQDs) to enhance light absorption and stability.Our objectives focus on synthesizing phasepure CsEuCl3 via hot-injection, optimizing CQD incorporation to reduce bandgap, and characterizing structure-property relationships for photovoltaic use.The results revealed that 3 wt% CQDs incorporation into CsEuCl3 significantly improved light absorption efficiency and reduced the optical bandgap compared to pristine CsEuCl3 and other CQDs concentrations.