高效倒置非镉体系的白光量子点电致发光器件的制备与机理研究

Quantum dot light emitting diodes (QLEDs) have attracted much attention due to the narrow emission spectrum width, low-cost solution processing and stable quantum dot emission layers. In fact, white QLEDs are necessary for both the lighting and display. In this project, we will build white QLEDs based on yellow quantum dots (QDs) solved in alcohol solution (such as methanol and ethanol) and blue Cd-free QDs complementary emission layers. The effects of these two emission layers on the injection and distribution of the carriers in the QLEDs can be explored by changing the deposition sequence of yellow and blue emission layers. In addition, we will insert an interfacial layer between the yellow and blue layers to adjust the injection and distribution of the carriers in devices, hence fabricate highly efficient white QLEDs based on complementary colors. These investigations will provide guidelines to the design and fabrication to the white devices and lay the foundation for the commercialization of white QLEDs.

照明和显示是关系到国防需求和国计民生的重要行业。量子点电致发光器件（QLEDs）由于具有窄的发光线宽，低成本的溶液加工技术以及更加稳定的量子点发光层等优势，近年来在照明和显示领域引起了人们的广泛关注。而无论是对于照明还是显示，白光器件都是必不可少的。本项目拟利用油相非镉体系的蓝光量子点及醇相黄光量子点组成的双层结构的白光发光层制备白光QLEDs，通过改变膜层沉积顺序及厚度，研究其对器件载流子注入及分布的影响；另外我们将通过在双发光层中间引入间隔层，调节载流子在不同发光层中的分布，从而实现对白光器件发光性能的调控，最终制备高性能的基于互补色的白光发光器件。预计本项目的成功实施将对QLEDs器件尤其是白光QLEDs器件的工作机制及器件设计提供实验依据及参考，为白光QLEDs的商业化进程奠定一定的基础。

照明和显示领域引起了人们的广泛关注。而无论是对于照明还是显示，白光器件都是必不可少的。本项目利用醇相黄光量子点及油相蓝光量子点组成的双层结构的白光发光层制备白光QLEDs，通过改变膜层沉积顺序及厚度，研究了其对器件载流子注入及分布的影响；另外我们通过在双发光层中间引入间隔层，调节载流子在不同发光层中的分布，从而实现对白光器件发光性能的调控，最终制备高性能的基于互补色的白光发光器件，为白光QLEDs的商业化进程奠定一定的基础。.