摘要
电致发光器件在发射过程中不产生对人体有害的光线,并且可大面积发光,颜色鲜艳,是照明和显示领域的革命性创新,广泛应用于显示器、电子皮肤和软体机器人等领域。分析了硫化锌(ZnS)电致发光器件的结构和原理,简述了电致发光器件通过电化学反应在电极表面激发自由电子至激发态,与空穴结合,跃迁回基态,从而产生发光的现象;介绍了可通过优化介电层和改性电极来降低交流电致发光器损耗率;综述了基于基板改性和电极优化以提高器件透过率,从而增强ZnS电致发光器件发光强度的方法,认为ZnS电致发光器件的发光强度、可拉伸性以及效率的提升是未来亟待解决的问题。
Significance In recent years,with the increasing demand for convenience in everyday life,textiles are now expected to have additional functions,such as health monitoring,electronic communication,and optical displays,apart from just providing warmth.Among these ubiquitous features of e-textiles,the optical display of textiles is vital for extensive applications.Alternative current electroluminescence(ACEL)refers to a solid luminescence phenomenon,in which composites convert electric energy into optical energy.Electroluminescent devices have been the research hotspots of lighting sources and displays that are highly desired for multi-field such as displays,electronic skin,and soft robots.Owing to the designable ease for easily stretching,compressing,bending,twisting,folding,and knotting,the flexible electroluminescent devices have attracted much attention.However,the progress has been limited by the effective integration of stretching performance,input voltage,brightness,and transmittance under development in electronic devices.Progress In the rapid development of wearable light-emitting devices,electroluminescent devices hold a large share of the global lighting and display market in the soft electronics field,including wearable electronics,implantable devices,electronic skin,soft robots,and energy generation and storage systems.Flexible ACEL devices based on nanoscale zinc sulfide(ZnS)materials due to high efficiency conversion rate,long light-emitting life,abundant light-emitting colors and energy-saving and environmentally friendly advantage have been developed.The current strategies for optimizing ACEL devices include reducing the voltage,increasing the brightness and improving the stretchability.The stretched ACEL display is limited by the high drive voltage required to achieve high brightness.The high voltage of ACEL devices seriously threatens the safety of the human body,making it difficult to put into practical application.A series of designed ACEL devices with emitting brightness at low voltage has been extensively investigated,which are suitable for practical applications.For decades,attention has been focused on ACEL devices due to their huge market value in light sources and display fields.In particular,great progress has been made in developing cost-effective manufacturing methods for environmentally friendly lighting devices.For flexible ACEL devices,various tensile strains are directed to different regions,while maintaining structural integrity and high performance under severe stress.Conclusion and Prospect The global demand for optoelectronic devices maintains a continuing sustainable growth.Due to the excellent luminescence in the lighting materials,electroluminescence has continuous improvement in soft electronics and wearable electronic devices with light,flexibility,and practicability.But the following questions remain.Corresponding to the advantages of high brightness,high performance relying on high voltage,limiting the practical application,the attention of ACEL devices in the display should be attracted in reducing the voltage to satisfy availability and stability of satisfactory emit brightness.With the rapid development and great progress of science and technology,a large number of electronic devices based on the ZnS have emerged,lacking the suitable materials to assemble devices of flexible and excellent performance.Therefore,it is necessary to study the electroluminescence characteristics of ZnS attributing to develop the ACEL devices and to expand the miniaturization and visualization of devices.Electroluminescent devices provide prominent properties compared to other large-area luminescence technologies.Although many investigations have been focused on color tunability and white light emission,the limitations on multi-color display and brightness uniformity restrict the extension of the application.
作者
魏欣洁
周思婕
夏良君
WEI Xinjie;ZHOU Sijie;XIA Liangjun(State Key Laboratory of New Textile Materials and Advanced Processing,Wuhan Textile University,Wuhan,Hubei 430200,China;College of Textiles,Donghua University,Shanghai 201620,China)
出处
《纺织学报》
北大核心
2025年第10期255-264,共10页
Journal of Textile Research
基金
国家自然科学基金地区联合基金项目(52303064)
山东省重点研发计划项目(2023CXGC010612)。
关键词
硫化锌
电致发光材料
柔性发光器件
电致发光原理
性能优化
zinc sulfide
electroluminescent material
flexible electroluminescent device
electroluminescent principle
performance optimization
