| 초록 |
We demonstrate the QDs AC EL display that were suitable for the emitting layer of the AC driven EL device and examine how efficiently these devices emit light in an AC field, QD-only field-induced EL devices were investigated. Approximately 100-nm-thick QD films were spin coated on 200-nm-thick SiO2 dielectric surfaces. All three QD-only AC devices in an AC field emitted the corresponding green, orange, or red light. The field-induced operation of a QD only device was confirmed by the luminance-frequency behavior of the green QD device in which the luminescence increased with frequency to a maximum at approximately 100 kHz. In addition, the luminance-voltage behavior of the QD-only device with almost linear increase in intensity was very similar to a fluorescent polymer device. The maximum brightness of the device was approximately 70 cd/m2 at an applied bias of 70 V and 100 kHz. |
