摘要:本文主要研究了荧光/磷光混合型白光有机发光二极管(White organic light-emitting diodes, WOLEDs)的器件结构及其对激子利用率的影响,并且进一步分析了其内在机制。在所制备的WOLEDs中,其发光层是由一种在薄膜状态下具有高荧光量子效率的聚集诱导发光(Aggregation-induced emission, AIE)材料TPB-PAC和在TPB-PAC层中引入的黄光磷光 Ir(tptpy)2(acac)超薄层组成。研究发现,插入的磷光超薄层位置对器件性能具有很大的影响,最后经磷光超薄层的优化,制备出高效率、低滚降双色荧光/磷光混合型WOLEDs,其最大外量子效率、功率效率和电流效率分别达到了25.31 %、85.80 lm W-1和81.34 cd A-1,在1000 cd m-2亮度下的外量子效率为23.19%,色度坐标(Commission Internationale de l'Eclairage, CIE)为(0.43,0.43),表现为标准的暖白光发射。
“In the field of organic light-emitting diodes (OLEDs), researchers have made significant progress. They designed and synthesized blue phosphorescent bipolar host materials based on different biphenyl linking sites, which effectively regulate the properties of host materials. This work provides an effective strategy for the development of high-efficiency blue phosphorescent hosts.”
“In the field of solar-blind ultraviolet photodetectors, researchers have made significant progress. They successfully deposited β-Ga2O3 nanopores on the double-pass ordered porous AAO template by PLD, forming a nanotube structure. By optimizing the preparation process, the relationship between the performance of gallium oxide nanopores and the growth time was studied in depth. The responsivity reached 4.63 mA / W, which was higher than 2.24 mA / W of the responsivity of silicon-based gallium oxide nanorods.”