셀룰로스 하이드로겔 전극 기반 교류전계발광소자

Abstract

Stretchable alternating current electroluminescent (ACEL) devices are fabricated using flexible and stretchable transparent electrodes, which have the advantage of maintaining stable light emission even under mechanical deformation. In this work, we developed a LiClO₄-doped HEC hydrogel material with high light transmittance and conductivity that can be applied to stretchable ACELs. To realize the conductive HEC hydrogel, films were fabricated using HEC, glycerol, urea, and glutaraldehyde, and soaked in LiClO₄ solution to enhance the ionic conductivity. A separately fabricated ZnS:Cu+PDMS emissive layer was sandwiched between the two cellulose films to complete the ACELs. The performance of the device was evaluated through mechanical properties, photometric, transmittance, and spectroscopic characteristics. The developed ACELs can be stretched up to 250%, and the luminance remains stable even when stretched in 50% increments. The maximum luminance was recorded at 230.33 cd/m², and the device showed excellent durability to various mechanical deformations such as bending, stretching, twisting, and cutting. The LiClO₄-doped HEC based ACELs demonstrated excellent mechanical durability and electrical performance, maintaining stable luminescence and brightness under various mechanical deformations due to their high flexibility and elasticity. In particular, the HEC hydrogel has biocompatible and environmentally friendly properties, which make them promising for multiple applications such as flexible electronics and wearable devices. Due to these properties, the device is expected to make an important contribution to the development of next-generation flexible electronics.