Surface methylated and Pt nano-dotted single crystal n-Si (111) electrodes yielded efficient photocurrent density (j) vs. potential (U) characteristics for more than 6h in a highly corrosive electrolyte of aqueous 8.6M HBr+0.05M Br2. On the other hand, H-terminated and Pt nano-dotted n-Si electrodes degraded seriously in about 15min. Surface methylated but non-Pt-dotted n-Si electrodes yielded only poor j-U characteristics with low Voc. The results clearly show that a combination of surface alkylation and metal nano-dot coating is an effective way to obtain efficient and stable Si photoelectrodes and hence photoelectrochemical solar cells.
- Liquid junction
- Surface modification
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films