宽禁带无重金属量子点用于蓝光发光二极管

Colloidal quantum dots(CQDs)are highly regarded for their outstanding photovoltaic characteristics,including excel-lent color purity,stability,high photoluminescence quantum yield(PLQY),narrow emission spectra,and ease of solution process-ing.Despite significant progress in quantum dot light-emitting diodes(QLEDs)technology since its inception in 1994,blue QLEDs still fall short in efficiency and lifespan compared to red and green versions.The toxicity concerns associated with Cd/Pb-based quantum dots(QDs)have spurred the development of heavy-metal-free alternatives,such as group Ⅱ-Ⅵ(e.g.,ZnSe-based QDs),group Ⅲ-Ⅴ(e.g.,InP,GaN QDs),and carbon dots(CDs).In this review,we discuss the key properties and development history of quantum dots(QDs),various synthesis approaches,the role of surface ligands,and important considera-tions in developing core/shell(C/S)structured QDs.Additionally,we provide an outlook on the challenges and future direc-tions for blue QLEDs.