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.
With the rapid development of Internet of Things (IoT) technology in recent years, self-actuated sensor systems without an external power supply such as flexible triboelectric nanogenerator (TENG)-based strain sensors have received wide attention due to their simple structure and self-powered active sensing properties. However, to satisfy the practical applications of human wearable biointegration, flexible TENGs impose higher requirements for establishing a balance between material flexibility and good electrical properties. In this work, the strength of the MXene/substrate interface was greatly improved by utilizing leather with a unique surface structure as the substrate material, resulting in a mechanically strong and electrically conductive MXene film. Due to the natural fiber structure of the leather surface, the surface of the MXene film with a rough structure was obtained, which improved the electrical output performance of the TENG. The electrode output voltage of MXene film on leather based on single-electrode TENG can reach 199.56 V and the maximum output power density can reach 0.469 mW/cm 2 . Combined with laser-assisted technology, the efficient array preparation of MXene and graphene was achieved and applied to various human−machine interface (HMI) applications.
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