Preparation and Application Research of Inorganic Flexible Substrate Alternating Current Electroluminescent Devices

In recent years, alternating current electroluminescence (ACEL) devices have demonstrated broad application prospects in intelligent lighting displays and flexible electronic devices. This research focuses on developing bottom-emitting electroluminescent devices (BES-ACEL) on inorganic substrates, achieving the preparation of luminescent layers on flexible ITO substrates through all-printing technology, resulting in electroluminescence-excited photoluminescence display devices. By adjusting the ratio of electroluminescent to photoluminescent phosphors, we optimized the luminescent layer ink composition, achieving both high illumination intensity and near-white light emission performance. Additionally, the correlation between the composition and luminescent properties was systematically analyzed. By adjusting the ink composition and device structure a white-emitting device with maximum brightness of 4 cd/m2 and CIE coordinates of (0.33, 0.34) was fabricated. This research provides both theoretical reference and practical value for the advancement of fully printed ACEL technology.