Taeyoon Kim1,Joohoon Kim1,Sungeun Han1,Misol Hwang1
Department of Chemistry, Kyung Hee University1
Taeyoon Kim1,Joohoon Kim1,Sungeun Han1,Misol Hwang1
Department of Chemistry, Kyung Hee University1
We study intuitive observation of electrochemical reactions through images obtained from photoinduced electrochemiluminescence (PECL), which combines light-addressable electrochemistry (LAE) and electrochemiluminescence (ECL). LAE provides information about electrochemical reactions through photogenerated carriers. In this study, we used stable hematite (α-Fe2O3) as a photoanode in an aqueous solution. Hematite has the advantage of obtaining a high spatial resolution due to the short diffusion distance of the minority carrier. By comparing the images of ECL and PECL, it was confirmed that the onset potential in PECL was lower. Using this method, we were able to observe that photogenerated carrier induces additional ECL reactions. Additionally, we used a digital mirror device (DMD) that allows for the flexible controllability of the light illumination shape of and confirmed the matching of the illuminated area and the ECL emission area. Furthermore, we propose the potential application of PECL imaging for characterizing the properties of single nanorods.