| 초록 |
In this study, we investigate the enhancement of out-coupling efficiency of QD-LEDs by introducing a unique nano-pillars array to an electron transport layer (ETL). To prepare the ZnO nano-pillar structures, nanoporous templates are first fabricated on ITO glass substrates by selective RIE process of thin films of self-assembled block copolymers (BCPs). As ZnO precursors are spin-coated on the nanoporous templates and thermal treatment, the ETL with the unique ZnO nano-pillars array is formed. Then QDs monolayer as a emissive layer (EML) is spin-coated on the ZnO layer. The QD-LEDs are fabricated by using sequential vacuum evaporation. The QD-LEDs with ZnO nano-pillars array are successfully characterized by measuring external quantum efficiency, luminance, and current density of the devices. |
