White light-emitting diodes fabricated utilizing hybrid polymer-colloidal ZnO quantum dots.
White light-emitting diodes (WLEDs) with a hybrid poly N-vinylcarbazole (PVK) and poly(methyl methacrylate) (PMMA) polymer and ZnO quantum dots (QDs) were fabricated by a spin-coating technique. Transmission electron microscopy images showed that the ZnO QDs were predominantly distributed at the circumference of the surface of the PVK polymer. Electroluminescence spectra for hybrid polymer-QD WLEDs showed a broad peak around 600 nm. The Commission Internationale de I'Eclairage chromaticity coordinates of the WLEDs fabricated utilizing hybrid polymer-QD WLEDs at 10 V were (0.39, 0.41), indicative of a white emission. The luminescence mechanisms of the WLEDs are described.
Son
Dong Ick
DI
Department of Information Display Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
You
Chan Ho
CH
Kim
Won Tae
WT
Kim
Tae Whan
TW