title: Characterization of surface modified ZnCuInS2 nanocrystals and its application to white light-emitting diodes.
abstract: Red-emitting ZnCuInS2 semiconductor nanocrystals (NCs) were synthesized and surface modification was performed on the NCs with oleylamine, trioctylphosphine, and 3-mercaptopropionic acid by the ligand exchange strategy. UV-visible spectroscopy, photoluminescence (PL) spectroscopy, time-resolved PL analysis, and attenuated total reflection Fourier transform infrared spectroscopy were used to verify the surface modification of NCs. Additionally, white light-emitting diodes (LEDs) were fabricated using surface modified red-emitting ZnCuInS2 NCs as red phosphor to compensate for the deficiency of red emission in white LEDs, consisting of blue LEDs as excitation sources and YAG:Ce as yellow phosphor.
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, Seoul, South Korea.
authors.forename: Hyunchul
authors.initials: H
authors.lastname: Jung
authors.forename: Wonkeun
authors.initials: W
authors.lastname: Chung
authors.forename: Chang Hun
authors.initials: CH
authors.lastname: Lee
authors.forename: Sung Hyun
authors.initials: SH
authors.lastname: Kim