| 초록 |
Here, we demonstrate directed patterning of colloidal quantum dots (QDs) using an imprinting method from chemically modified surface. The chemically modified patterns are initially fabricated by using a conventional photolithography technique and chemical reaction of surface-modifying molecules. Three different types of quantum dots are then spin-coated on the patterned surface. To transfer the QDs layer to a hole transfer layer, a flat elastomeric pad is placed as a stamp on the QDs layer and uniformly pressed for solid contact between the QDs layer and the stamp. As the stamp is lifted, the only designed QD patterns are selectively transferred to the bottom surface of the stamp due to surface energy difference. The top elastomeric pad is subsequently placed on the hole transfer layer for transferring the QDs patterns. Consequently, QD-LEDs are fabricated and characterized by measuring typical properties of the devices. |
