Special Issue Information

Organic light emitting diodes (OLEDs) are a type of light emitting diode based on organic semiconductors. Due to their advantages such as self-emission, tunable wavelength molecular structure, wide viewing angle, fast response speed, soft light, low cost, large area, and flexibility, they are considered a new generation of display and lighting technology. Since C. W. Tang et.al reported on low-voltage and high-efficiency double-layer OLEDs in 1987, OLEDs have received extensive research in materials, devices, physics, theory, mechanism, and applications, greatly promoting the development of OLEDs industry and the establishment of discipline of organic optoelectronics. Currently, OLEDs have been well applied in fields such as smartphones, televisions, wearable electronic devices, and automotive lighting, etc. The further widespread applications of OLEDs have also put forward higher requirement for materials, devices, and processes, as well as an urgent need for semiconductor theory.

Obviously, the future applications of OLEDs need to develop towards high performance and long lifetime, especially in the aspect of blue light materials and devices, which has always been a pain point in the field. In recent years, significant progresses have been made in efficiency and stability of OLEDs, such as breakthroughs in stable Pt complex phosphorescent blue materials, high efficiency, stable narrow band TADF materials, hot exciton materials, and their corresponding device performances. Therefore, the journal of Smart Materials and Devices will launch a Special Issue title of "Towards to High-Performance and Long-Lifetime OLEDs", summarizing the key issues, latest developments, challenges, and future development trends related to OLEDs materials, devices, and applications. It is hoped that this will provide reference for further research and industrialization of OLEDs. The topics in this Special Issue will focus on the broad contents but are not limited as follows: (1) advanced organic materials for high performance and long lifetime OLEDs, such as blue materials, host materials and transport materials, and their photophysical properties; (2) Efficient device structures for high performance and long lifetime OLEDs, such as how to realize highly efficient utilization of excitons, how to establish exciton dynamics for the mechanism of exciton losses and efficiency roll-off, how to develop physics models for the device design and degradation mechanism; (3) emerging encapsulation technologies for high performance and long lifetime OLEDs; (4) Solution processable organic materials and devices for high performance and long lifetime OLEDs.

Keywords

Organic light emitting diodes, blue materials, long lifetime, high performance, excitons, devices

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