Zhu Wenqing, Ding Kuangyu, Yi Chen, Chen Ruilin, Wei Bin, Huang Lu, Li Jun
School of Materials Science and Engineering, Shanghai University, Shanghai, China.
School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai, China.
Front Chem. 2021 Apr 29;9:657557. doi: 10.3389/fchem.2021.657557. eCollection 2021.
In this study, we have synthesized the molybdenum sulfide quantum dots (MoS QDs) and zinc sulfide quantum dots (ZnS QDs) and demonstrated a highly efficient green phosphorescent organic light-emitting diode (OLED) with hybrid poly (3,4-ethylenedioxythiophene)/poly (styrenesulfonate) (PEDOT:PSS)/QDs hole injection layer (HIL). The electroluminescent properties of PEDOT:PSS and hybrid HIL based devices were explored. An optimized OLED based on the PEDOT:PSS/MoS QDs HIL exhibited maximum current efficiency (CE) of 72.7 cd A, which shows a 28.2% enhancement as compared to counterpart with single PEDOT:PSS HIL. The higher device performance of OLED with hybrid HIL can be attributed to the enhanced hole injection capacity and balanced charge carrier transportation in the OLED devices. The above analysis illustrates an alternative way to fabricate the high efficiency OLEDs with sulfide quantum dots as a HIL.
在本研究中，我们合成了硫化钼量子点（MoS QDs）和硫化锌量子点（ZnS QDs），并展示了一种具有混合聚（3,4-乙撑二氧噻吩）/聚（苯乙烯磺酸盐）（PEDOT:PSS）/量子点空穴注入层（HIL）的高效绿色磷光有机发光二极管（OLED）。研究了基于PEDOT:PSS和混合HIL的器件的电致发光特性。基于PEDOT:PSS/MoS QDs HIL的优化OLED表现出最大电流效率（CE）为72.7 cd/A，与具有单一PEDOT:PSS HIL的对应器件相比提高了28.2%。具有混合HIL的OLED更高的器件性能可归因于OLED器件中空穴注入能力的增强和电荷载流子传输的平衡。上述分析说明了一种以硫化物量子点作为HIL来制造高效OLED的替代方法。
