작업전극과 상대전극에 탄소나노튜브를 이용한 염료감응 태양전지의 특성연구

Abstract

Abstract: The effect of electrochemical characteristics of dye-sensitized solar cells (DSSC) upon employingmulti-wall carbon nanotube (MWCNT) on both working electrode and counter electrode were examined withusing EIS, J-V curves and UV-Vis absorption spectrometry. When 0.1 wt% of MWCNT was employed in theTiO 2 -MWCNT composit on working electrode, the energy conversion efficiency increased about 12.5%compared to the TiO 2 only working electrode. The higher light conversion efficiency may attribut to the highelectrical conductivity of MWCNT in TiO 2 -MWCNT composite which improves the electron transport in theworking electrode. However, higher amount of MWCNT than 0.1 wt% in the TiO 2 -MWCNT compositedecreases the light conversion efficiency, which is mainly ascribed to the decreased transmittance of light byMWCNT and to the decreased adsorption of dye onto TiO 2 . The MWCNT employed counter electrode exhibitedmuch lower light conversion efficiency of DSSC than the Pt-counter electrode, while the MWCNT-Pt counterelectrode showed similar in light conversion efficiency to that of Pt-counter electrode. 요약: 염료감응형 태양전지의 광전극 및 상대전극에 탄소나노튜브를 도입하여 전지의 광전기적 특성 변화를 EIS, J-V 특성곡선 및 UV-Vis 분광기를 이용하여 분석하였다. TiO