| 초록 |
Low-temperature solution processable inorganic vanadium oxide (V2O5) hole injection layer (HIL) was synthesized for flexible quantum-dots light emitting diodes (QLEDs). Efficient hole injection characteristics were observed at the hole only devices, even the process temperature of V2O5 was as low as room-temperature. The origin of the efficient hole injection was investigated by measuring ultraviolet and x-ray photoelectron spectroscopy, and we found that the density of gap states was increased according to reduce the process temperature. Therefore, QLEDs with a low-temperature solution processable V2O5 HIL was fabricated on a glass substrate, and the device showed excellent characteristics. Due to the low-temperature process of V2O5 HIL, it was possible to fabricate QLEDs on a flexible plastic substrate without mechanical deformation of plastic substrates, as well. |
