胶体量子点多色LED的设计、制备和表征  

Design,Fabrication and Characterization for Multi-coloured Light Emitting Diode Based on Colloidal Quantum Dots

作　　者：张文君[1] 翟保才[1] 许键[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光电工程》2012年第11期138-143,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(61078007);曙光计划(10SG46;NFSC(61078007);上海市科委(1052nm07100和11530502200)

摘　　要：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30nm)。为了研究不同发光颜色的QD-LED器件特性,本文采用具有523nm和608nm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.

关 键 词：量子点LED 器件结构 制备 

分 类 号：TN383.1[电子电信—物理电子学]