摘要
Electroluminescent (EL) quantum dot light-emitting diode (QLED) array for pixel-on-demand display containing 75 emitting zones (5 × 15) is demonstrated by a single larger-area QD EL film (5 cm × 5 cm). To fabricate a passive-matrix (PM) QLED display, the 5 × 15 QLED emitting array without any pre-patterned bank is directly defined by the overlapping area of crossing ITO and Al finger electrodes. As-prepared emitting array has obvious electrical crosstalk, making the on-demand pixels emit together with some neighbors undriven, which is ascribed to a carrier leakage to the neighbor pixels. By applying the common electrode voltage to the unselected rows, the undesired electrical crosstalk has been thoroughly suppressed. This study first demonstrated that a PM-QLED display can be feasibly realized by a bank-free quantum dot film prepared from a coating process without any pixel defining layer or complex driving condition.