Sung Hun Kim Ji-Yeon Kim Son, Dong Ick Hong Seok Lee 2024-05-10T07:30:04Z 2024-05-10T07:30:04Z 2024-05-10 2024-05 1944-8244 https://pubs.kist.re.kr/handle/201004/149812 Colloidal quantum dots (QDs) are promising candidates for next-generation display technology because of their unique optical properties and have already appeared in the market as a high-end product. On the basis of their extraordinary properties, QD emissions with a given chemical composition can be tailored in a wide spectral window due to quantum size effects, which constitutes a key advantage of QDs in the display field. Specifically, investigations of structure-dependent and composition-dependent characterizations outside the quantum confinement effect have become an important part of practical applications. Therefore, from the perspective of designing nanostructures with well-defined heterointerfaces, strong quantum confinement effects with effective carrier confinement are desirable. Our results show that the photoluminescence (PL) intensity of CdSe/CdZnS core？shell QDs was enhanced 5.7 times compared with that of the CdSe core QDs. Supplementary analytical techniques involving transmission electron microscopy revealed the heterointerface configuration and composition distribution of the core and shell materials. The effects of the heterointerface on carrier dynamics in core？shell QDs were revealed by monitoring wavelength-dependent time-resolved PL. To further develop the QD light-emitting diodes (QD-LEDs), we produced an all-solution processed inverted QD-LEDs using CdSe/CdZnS core？shell QDs as the emitter. The electroluminescence spectrum of deep-red emissive QD-LEDs with CIE chromaticity coordinates of (0.68, 0.32) exhibited a peak at 638 nm. English American Chemical Society Heterointerface Effects on Carrier Dynamics in Colloidal Quantum Dots and Their Application to Light-Emitting Diodes Article 10.1021/acsami.4c01325 1 ACS Applied Materials & Interfaces, v.16, no.19, pp.25511 - 25518 ACS Applied Materials & Interfaces 16 19 25511 25518 N scie scopus 001225063200001 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article heterointerface effects wavelength dependent time-resolvedphotoluminescence quantum dot light-emitting diodes colloidal quantum dots core-shell heterostructures