Multifunctional Displays and Sensing Platforms for the Future: A Review on Flexible Alternating Current Electroluminescence Devices

Abstract

Alternating current electroluminescence (ACEL) as a unique display technology has been studied for decades. Due to the development of component materials (phosphor, dielectric, electrodes, and substrates), ACEL devices have obtained extreme deformability and high luminescence, as well as other unique properties, enabling ACEL to be suitable for multifunctional displays and sensing platforms. In this era of great demand for wearable electronics and flexible displays, flexible ACEL devices are facing unprecedented development opportunities, and some outstanding research has emerged. This Review first introduces the configurations and mechanisms of flexible ACEL devices and highlights the functions and development of each component material in flexible ACEL devices. In the second part, this Review focuses on the advances and potential of ACEL in the field of multifunctional displays and sensing platforms and shows the bright prospects of flexible ACEL devices.

Optimising the electroluminescence performance of ZnS: Cu/epoxy composites via exploring the relationship between electroluminescence intensity and filler intrinsic attributes

“…To enhance the performance of ZnS: Cu/ epoxy composites and expand the scope of practical engineering application, studies on how to improve the electroluminescence intensity of composites have been carried out. The dielectric constant of the matrix can be improved by introducing ceramic fillers, so that the electric field can be concentrated near the phosphor particles [8]. This contributes to the occurrence of collision excitation and ionization of electrons [50], and also the reduction of interface refractive index difference between the matrix and the phosphor particles, which makes it easier for the light to pass through the matrix, and consequently enhances the electroluminescence intensity.…”

“…The amplitude and frequency composition of an electric field becomes more complex accompanied by the introduction of a large number of power electronic devices [3]. Traditional sensors are prone to resonance and need a carrier light source [4,5], while the sensors based on the electroluminescence effect have the advantages of excellent electrical insulation performance and distributed measurement [6][7][8]. Electroluminescence refers to a solid luminescence phenomenon, in which composites convert the electric energy into optical energy [9,10].…”

Textile-based electrophoretic electronic paper displays with machine-washable, tailorable, and thermostatic functions for truly wearable displays

“…[1][2][3][4] Current display technologies are mainly divided into emissive and reflective modes. [5][6][7][8] Alternating current electroluminescence (ACEL) display, as one of the typical emissive modes composed of organic or inorganic materials, has been broadly integrated into diverse substrates with high deformability and stable performance and can serve as a patterned display, pixelated display, and display system. 9,10 However, the ACEL display requires a few hundred operating volts for enough light emission that exceed the body safety voltage of 36 V. 11,12 It also leads to high sustained power consumption, severely limiting its widespread popularization.…”

Highly Flexible Electroluminescent Devices Based on Super Durable AlN‐Dispersed Ag Ultrathin Films

“…With the rapid development of the wearable device market, the development of flexible electronic devices has become the dominant trend in the electronic industry. [ 1 ] Meanwhile, flexible alternating current electroluminescence (ACEL) devices widely used in dynamic graphic display, bionic electronic skin, visual health monitoring equipment, and large‐area display textiles have attracted people's attention. [ 2–4 ] Among them, the high‐performance flexible electrode is one of the critical components for developing a promising flexible ACEL device, which often affects the performance of the whole equipment in various working environments.…”