Doping a Wide Bandgap Material Sr2SnO4 for Solar-driven Water Splitting
Louise Foltzer-De Cian a, Kevin Sivula a
a Laboratory for Molecular Engineering of Optoelectronic Nanomaterials (LIMNO), École Polytechnique Fédérale de Lausanne (EPFL), , Switzerland, Station 6, CH-1015 Lausanne, Lausanne, Switzerland
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
#ADINOS - Advances in inorganic thin film semiconductors for solar energy conversion
Lausanne, Switzerland, 2024 November 12th - 15th
Organizers: Mirjana Dimitrievska and Sudhanshu Shukla
Poster, Louise Foltzer-De Cian, 372
Publication date: 28th August 2024

Photoelectrochemical or heterogeneous photocatalytic water splitting are effective ways to store solar energy through the conversion of water into hydrogen and oxygen. Many semiconductor materials have been intensively used and investigated for these applications, but they typically suffer from poor photostability and low light harvesting efficiency. More recently, wide bandgap materials have attracted attention because of their exceptional activity and stability.[1,2] However, their ability to harvest the solar spectrum limits their performance. Using dopants, their optical properties can be tuned and allow absorption in the visible light for an improved activity. This presentation will show the effects of molybdenum doping on the optical and structural properties of Sr2SnO4, a wide bandgap material known for its luminescent properties[3,4] and high performance in optoelectronics,[5] but that has never been studied for photoelectrochemical applications before. The first photoanodic activity observed under visible light illumination will be presented, and potential routes for improvements and alternative oxidation reactions will be discussed.

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