Sharma Dipanshu, Gull Sanna, Ramakrishnan Anbalagan, Lenka Sushanta, Kumar Anil, Kumar Krishan, Lin Pin-Kuan, Wang Ching-Wu, Chen Sinn-Wen, Grigalevicius Saulius, Jou Jwo-Huei
Department of Materials Science and Engineering, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan.
Department of Chemical Engineering, National Tsing Hua University, 101, Sec. 2, Guang-Fu Road, Hsinchu 30013, Taiwan.
Molecules. 2024 Dec 25;30(1):27. doi: 10.3390/molecules30010027.
Low-color-temperature candlelight organic light-emitting diodes (OLEDs) offer a healthier lighting alternative by minimizing blue light exposure, which is known to disrupt circadian rhythms, suppress melatonin, and potentially harm the retina with prolonged use. In this study, we explore the integration of transition metal dichalcogenides (TMDs), specifically molybdenum disulfide (MoS) and tungsten disulfide (WS), into the hole injection layers (HILs) of OLEDs to enhance their performance. The TMDs, which are known for their superior carrier mobility, optical properties, and 2D layered structure, were doped at levels of 0%, 5%, 10%, and 15% in PEDOT:PSS-based HILs. Our findings reveal that OLEDs doped with 10% MoS exhibit notable enhancements in power efficacy (PE), current efficacy (CE), and external quantum efficiency (EQE) of approximately 39%, 21%, and 40%, respectively. In comparison, OLEDs incorporating 10% of WS achieve a PE of 28%, a CE of 20%, and an EQE of 35%. The enhanced performance of the MoS-doped devices is attributed to their superior hole injection and balanced carrier transport properties, resulting in more efficient operation. These results highlight the potential of incorporating 2D TMDs, especially MoS, into OLED technology as a promising strategy to enhance energy efficiency. This approach aligns with environmental, social, and governance (ESG) goals by emphasizing reduced environmental impact and promoting ethical practices in technology development. The improved performance metrics of these TMD-doped OLEDs suggest a viable path towards creating more energy-efficient and health-conscious lighting solutions.
低色温烛光有机发光二极管（OLED）通过将蓝光暴露降至最低，提供了一种更健康的照明选择。众所周知，蓝光会扰乱昼夜节律、抑制褪黑素分泌，长期使用还可能损害视网膜。在本研究中，我们探索将过渡金属二硫属化物（TMD），特别是二硫化钼（MoS）和二硫化钨（WS），集成到OLED的空穴注入层（HIL）中，以提高其性能。TMD以其卓越的载流子迁移率、光学特性和二维层状结构而闻名，在基于PEDOT:PSS的HIL中分别以0%、5%、10%和15%的水平进行掺杂。我们的研究结果表明，掺杂10%MoS的OLED在功率效率（PE）、电流效率（CE）和外量子效率（EQE）方面分别有显著提高，约为39%、21%和40%。相比之下，掺入10%WS的OLED的PE为28%，CE为20%，EQE为35%。掺MoS器件性能的提高归因于其卓越的空穴注入和平衡的载流子传输特性，从而实现了更高效的运行。这些结果突出了将二维TMD，特别是MoS，纳入OLED技术作为提高能源效率的一种有前景策略的潜力。这种方法通过强调减少环境影响和促进技术开发中的道德实践，符合环境、社会和治理（ESG）目标。这些掺TMD的OLED改进的性能指标表明，朝着创造更节能和注重健康的照明解决方案迈出了一条可行的道路。
