Abstract
Abstract Surface methylated and Pt nano-dotted single crystal n-Si (1 1 1) electrodes yielded efficient photocurrent density ( j ) vs. potential ( U ) characteristics for more than 6 h in a highly corrosive electrolyte of aqueous 8.6 M HBr+0.05 M Br 2 . On the other hand, H-terminated and Pt nano-dotted n-Si electrodes degraded seriously in about 15 min. Surface methylated but non-Pt-dotted n-Si electrodes yielded only poor j – U characteristics with low V oc . 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.
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