ABSTRACT
Due to the unique capabilities of organic components, such as ultrathin and simple structures, low-temperature manufacturing, and the ability to fabricate in mechanically flexible structures on a plastic substrate, organic light-emitting diodes (OLEDs) are incredibly promising display technologies. Despite the fact that flexible OLEDs have been successfully demonstrated, some technical problems with relatively thick transparent electrodes composed of ceramic materials and an unstable flexible encapsulation technique have prevented full commercialization. This chapter deals with recent advancements in structure designs for highly efficient and durable stretchable and flexible OLEDs, ranging from varieties of transparent electrodes to thin-encapsulation layers, in which the solution for the various existing critical issues of flexible OLEDs are discussed in detail. Emerging active emission layers, substrate materials, and challenges in the developments of blue flexible OLEDs are also covered in this chapter. The factors influencing current, power, and luminescence efficiencies of flexible OLEDs are also highlighted in this chapter. IQE, EQE, current density, power consumption, EL intensity, current efficiency, and power efficiency are the key parameters that are used to analyze the performance of flexible OLEDs.
