摘要
Motivated by the color tunability and narrow-band emission peak of colloidal quantum dots(QDs),the concepts of quantum dot light-emitting diodes(QD-LEDs),based on either the photoluminescence(PL)or electroluminescence(EL)mechanism,have been proposed for a few years[1].Using QD-LEDs in the backlighting system of liquid crystal display(LCD)can significantly expand the
Motivated by the color tunability and narrow-band emis- sion peak of colloidal quantum dots （QDs）, the concepts of quantum dot light-emitting diodes （QD-LEDs）, based on either the photoluminescence （PL） or electroluminescence （EL） mechanism, have been proposed for a few years [1]. Using QD-LEDs in the backlighting system of liquid crystal display （LCD） can significantly expand the color gamut of display and present vibrant colored images. However, even though CdSe-based QDs have been com- mercially used in backlighting system, this innovative technique is still suffering from the complicated preparation process, the lack of surface control during process, and unacceptable price of high-quality CdSe-based QDs. Moreover, the developing of high-performance （bright, efficient, and stable） EL devices strongly relies on the precise band engineering of the core and shell as well as surface ligands [2]. To solve these problems, alternative materials with simple process have been much aspired.
