量子点 LED 采用胶体量子点为 LED发光层, 通过调节量子点的尺寸可以制作出覆盖可见以及近红外光谱的量子点 LED(QD-LED), 而且量子点 LED器件发出的光谱范围很窄 (光谱半高宽可达 30 nm)。为了研究不同发光颜色的QD-LED器件特性, 本文采用具有 523 nm和608 nm发光波长的 CdSe/ZnS核壳型量子点为发光层、 poly-TPD为空穴传输层、 ZnO为电子传输层, 制备了量子点红光和绿光 LED并讨论了器件的相关特性。这些结果对量子点 LED在飞机驾驶舱以及医疗器械照明方面的应用提供了参考, 但要满足商业化的需求其寿命、亮度以及效率还需要进一步的提高。

Colloidal Quantum Dots (QDs) acted as luminescent layer in light emitting device can be tuned across from visible to near-infrared spectrum by changing the size of QD, and QD-LED has a narrow bandwidth (Full-width at Half-maximum (FWHM) of the Electroluminescence (EL) peak of ～30 nm). Core–shell quantum dots (wavelength at 523nm and 608nm) with a CdSe core and a ZnS shell were used as emissive layers in the devices. Poly-TPD as Hole-transport Layer (HTL) and ZnO as Electron-transport Layer (ETL) were used in device. By fabrication of red and green emitting device based on quantum dots, we researched the feature of device which provides reference for quantum-dot-based LEDs used in the cockpit and medical apparatus. However, the brightness, efficiency and lifetime of QD-LED need to be improved to meet the requirements of commercialization in the near future.