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Pouliquen, Julie Le
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- 2021High-Quality Factor Zinc-Blende III-V Microdisks on Silicon for Nonlinear Photonics
- 2020Loss assessment in random crystal polarity gallium phosphide microdisks grown on siliconcitations
- 2020Random crystal polarity of Gallium phosphide microdisks on silicon
- 2019GaPSb/Si photoelectrode for Solar Fuel Production
- 2018Excitons bounded around In-rich antiphase boundaries
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document
GaPSb/Si photoelectrode for Solar Fuel Production
Abstract
Solar water splitting consists in the production of hydrogen fuel by photoelectrochemical (PEC) reactions. It offers a clean, environmentally friendly solution to sustain the global energy supply and has driven many researches recently [1-2]. Efficient solar water splitting demands suitable photoelectrodes, which should enable high light absorption and feature a band gap with appropriate band alignment to realize charge transfer from the photoelectrode to water. In this work, we investigate the potential of a new photoelectrode material GaPSb/Si for solar water splitting. Relaxed GaPSb monocrystalline alloy was grown on cheap silicon substrate by molecular beam epitaxy (MBE) without any evidence of phase separation. The band structure of GaPSb/Si is determined by combining experimental optical measurements with tight binding (TB) theoretical calculations, confirming the appropriate band alignment for water splitting. Moreover, PEC characterizations were carried out on different GaPSb/Si samples, demonstrating good PEC performances. GaPSb/Si thus appears as a promising candidate for low-cost high-efficiency solar water splitting.[1] D. Kang, T. W. Kim, S. R. Kubota, A. C. Cardiel, H. G. Cha, K.-S. Choi, Chemical reviews 2015, 115, 12839. [2] I. Lucci, S. Charbonnier, M. Vallet, P. Turban, Y. Léger, T. Rohel, N. Bertru, A. Létoublon, J.-B. Rodriguez, L. Cerutti, E. Tournié, A. Ponchet, G. Patriarche, L. Pedesseau, C. Cornet, Advanced Functional Materials 2018, 28, 1801585.