Si microstructures laminated with a nanolayer of TiO2 as long-term stable and effective photocathodes in PEC devices. Issue 17 (2nd April 2015)

• Record Type: Journal Article
• Authors: Das, Chittaranjan; Tallarida, Massimo; Schmeisser, Dieter
• Is Part Of: Nanoscale. Volume 7:Issue 17(2015)
• Page Start: 7726
• Page End: 7733
• Publication Date: 2015-04-02
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr00764j
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Photoelectrochemical (PEC) water splitting is one of the most emerging fields for green energy generation and storage. Abstract : Photoelectrochemical (PEC) water splitting is one of the most emerging fields for green energy generation and storage. Here we show a study of microstructured Si covered by a TiO2 nano-layer. The microstructures are prepared by galvanostatic selective etching of Si. The TiO2 nano-layer was deposited by atomic layer deposition (ALD) to protect the microstructured photocathode against corrosion. The obtained microstructured photocathode showed a shift in the onset potential of 400 mV towards the anodic direction compared to bare Si. The Si microstructures laminated with a nano-layer of TiO2 show stability over 60 hours of measurement.