Publikation

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Originalbeitrag (peer-reviewed)

Zeitschrift JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
Titel der Proceedings JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
DOI 10.1063/1.4812831

Abstract

A facile and low-cost dip-coating process for the deposition of silicon doped 15 hematite films (Si:a-Fe2O3) for hydrogen production by solar water splitting in 16 photo-electrochemical cells (PEC) is presented. The precursors include iron nitrate, 17 AQ1 oleic acid, tetraethoxysilane (TEOS) and tetrahydrofuran as dispersion agent. 18 Sequential dip coating on transparent conducting oxides glass substrates with 19 heat treatment steps at 500 C and 760 C yields mesoporous Si:a-Fe2O3 with 20 a roughness factor of 17 and photocurrent densities >1mA/cm 21 2 at 1.23V vs. reversible hydrogen electrode with SiOx underlayer and surface modification. A 22 PEC demonstrator with 80 cm 23 2 active area in 1M potassium hydroxide yields a photocurrent of 35mA at 1.5 AM irradiation with the corresponding hydrogen 24 evolution at a Pt wire counter electrode
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