Ou Kai, Bai Liyuan, Huang Miaoling, Yi Lixin, Duan Xiaoxia, Wang Shenwei
School of Physical Science and Technology, Key Laboratory of Advanced Technology of Materials Ministry of Education of China, Southwest Jiaotong University, Chengdu 610031, China.
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
ACS Omega. 2020 Sep 19;5(38):24567-24573. doi: 10.1021/acsomega.0c03071. eCollection 2020 Sep 29.
Compared to colloidal quantum dots, nanostructured multilayer films may also be a promising emission layer in future light-emitting diodes, due to their excellent photoluminescence (PL), narrow full width at half-maximum (FWHM), and wide color gamut. In this paper, multilayer-structured deep-blue light-emitting diodes (LEDs) were prepared, where nanostructured ZnSe/ZnS multilayer films act as the light-emitting layer. The device showed good blue electroluminescence (EL) spectrum locating at 448 nm with an FWHM of 31 nm. To improve the performance of the device, the effect of preparation parameters of different layers was investigated in detail. The results demonstrated that the preparation parameters of each layer affected the performance in different ways, and choosing the most suitable preparation parameters can achieve optimal performance. Furthermore, this multilayer-structured device based on nanostructured films as emission layer can also be applied in green and red LEDs or all-inorganic QLEDs.
与胶体量子点相比，纳米结构多层膜由于其优异的光致发光（PL）、窄的半高宽（FWHM）和宽色域，在未来的发光二极管中也可能是一种有前景的发光层。本文制备了多层结构的深蓝色发光二极管（LED），其中纳米结构的ZnSe/ZnS多层膜作为发光层。该器件显示出良好的蓝色电致发光（EL）光谱，位于448nm，FWHM为31nm。为了提高器件性能，详细研究了不同层制备参数的影响。结果表明，各层的制备参数以不同方式影响性能，选择最合适的制备参数可实现最佳性能。此外，这种基于纳米结构薄膜作为发射层的多层结构器件也可应用于绿色和红色LED或全无机量子点发光二极管（QLED）。
