QLED having optical microcavity structure and preparation method thereof

Abstract

The invention is suitable for the field of a quantum dot light-emitting diode and provides a QLED having an optical microcavity structure and a preparation method thereof. The QLED having the optical microcavity structure comprises a first electrode, a quantum dot light-emitting layer and a second electrode, which are in stack arrangement in sequence, wherein the first electrode and the second electrode are positive pole and negative pole respectively, or the first electrode and the second electrode are negative pole and positive pole respectively. The QLED further comprises the optical microcavity structure which is arranged at the side, away from the quantum dot light-emitting layer, of the first electrode. The optical microcavity structure is formed by one interference unit or a plurality of interference units in stack arrangement. Each interference unit comprises a first refractive index layer and a second refractive index layer stacked on the first refractive index layer, wherein refractive index of the first refractive index layer is larger than that of the second refractive index layer, and the first electrode is stacked on the second refractive index layer.

Description

technical field [0001] The invention belongs to the field of quantum dot light-emitting diodes, in particular to a QLED with an optical microcavity structure and a preparation method thereof. Background technique [0002] With the continuous development of economy and technology, people have higher and higher requirements on the display quality of electronic products. After years of development, quantum dot light-emitting diode (QLED), a new display technology, has gradually come into people's sight. QLED uses thin-layer quantum dots as the light-emitting layer, and has a series of advantages such as active light emission, high brightness, high color purity, long life, low power consumption, simple processing technology, and low production cost. It is the next generation of high-performance display and lighting technology. Direction of development. Such as figure 1 As shown, a common QLED usually includes the following functional layers: anode 1', hole injection layer 2',...

AI Technical Summary

Problems solved by technology

It is generally believed that the performance of QLEDs is jointly determined by the above-mentioned functional layers and their manufacturing processes. Once the materials and processes are determined, it is difficult to greatly improve the performance of QLED devices.

Images