| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | C. 에너지/환경 재료(Energy and Environmental Materials) |
| 제목 | 실리콘/탄소 코어-쉘 나노와이어 합성 및 염료감응태양전지에의 응용 |
| 초록 | While carbon nanomaterials such as graphene and single walled carbon nanotubes (SWCNTs) is low in electrocatalytic activity due to low or none of defect sites, it is well known that defective ones such as multi walled carbon nanotubes (MWCNTs) and N-doped graphene nanoplatelets show good electrocatalytic activity. Platinum is suitable for oxygen reduction reaction (ORR) in fuel cells and reduction of iodide/triodide in dye-sensitized solar cells (DSSCs) as catalysts. However, there is the need for replacement of Pt due to the high costs. Recently, many scientists and researchers have employed the defective carbon nanomaterials or a mixture of Pt and the defective carbon nanomaterials to above mentioned application to replace Pt or enhance the performance, respectively. In the present work, we fabricated silicon/carbon core-shell nanowires (SiNW/C) and applied them to DSSCs as counter electrodes. The carbon shell surrounding the core silicon nanowire protects the surface of the silicon nanowire from corrosion and simultaneously play a role as a catalyst. We proved that the electrocatalytic activity and internal resistance of the SiNW/C with cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The best power conversion efficiency of the device based on the SiNW/C counter electrode was ＞ 9 % under AM1.5G illumination and comparable to that of the Pt based device (9.75 %). |
| 저자 | 김준희1, 김민수1, 임정민2, 이해석1, 강윤묵1, 전용석2, 김동환1 |
| 소속 | 1고려대, 2건국대 |
| 키워드 | Silicon nanowires; Carbon materials; Core-shell; Dye-sensitized solar cells |
