Investigation of electro-optical properties for electrochemical luminescence device with a new electrode structure

• Published in: Optical materials 2018-04, Vol.78, p.226-234
• Main Authors: Ok, Jung-Woo, Pooyodying, Pattarapon, Anuntahirunrat, Jirapat, Sung, Youl-Moon
• Format: Article
• Language: English
• Subjects: Efficiency; Electrochemical device; Luminescence; Microelectrodes
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2018.01.044

In this paper, we investigate electrochemical luminescent (ECL) device with a new structure and the ECL cell device with proposed electrode configuration works reliably at AC voltage. In particular, the conventional ECL cell has counter electrodes in which a cathode and an anode are opposed to each other, whereas the proposed structure has parallel electrodes in which a cathode and an anode are arranged on a single substrate. The proposed electrode configuration has a structural feature that electric short-circuiting is less likely to occur during bending than the conventional electrode configuration. The electro-optical characteristics of the new electrode configuration such as the current density, the light emission intensity, and the time evolution of the emission are investigated. The proposed ECL device exhibited higher light emitting efficiency than the conventional structure. Especially, at AC operation mode, the new structure showed the distinctive luminescence characteristic which is combined the first luminescence near the surface of electrode with the delayed second luminescence near the center of between electrodes. It was closely related to the behavior of luminescent particles. The proposed the ECL cell structure is expected to be utilized as a flexible display device by taking advantage of its characteristics and practicality. •An electrochemical luminescent (ECL) device with new electrode structure is proposed to improve performance.•The proposed parallel electrodes is located on a single substrate in ECL cell.•The performance of the proposed ECL cell structure showed enhanced luminous property than the conventional structure.•The proposed ECL cell with parallel electrode showed the distinctive luminescence property combined lagged light emission.