| 초록 |
In this study, Ru-N-doped template-free mesoporous carbons (Ru-N-TMCs) were prepared by direct stabilization and carbonization of poly(butyl acrylate)-b-polyacrylonitrile (PBA-b-PAN) block copolymer and Ru(acac)3, where PAN acts as semi-graphitic carbon source and PBA act as porous template. The resulting Ru-N-TMCs shows ultra-low charge transfer resistance (Rct = 0.034 Ω cm2) in cobalt(bpy)33+/2+ reduction reaction, indicating very high electrocatalytic ability. Even though a transparent CE, covering small fraction of FTO substrate with Ru-N-TMCs shows lower charge transfer resistance (Rct = 0.55 Ω cm2) compared to Pt (Rct = 1.00 Ω cm2). The Ru-N-TMCs CE exhibited superior power conversion efficiency (11.67%) to the Pt CE (11.49%), when employed in SGT-021/cobalt(bpy)33+/2+-based DSSC. Furthermore, a remarkable power conversion efficiency of 10.13 % and 9.64% from front and rear illumination, respectively, were obtained when Ru-N-TMCs CEs employed in a bifacial DSSC. |
