EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 6CO.13.1 Perovskite-Silicon Tandem Based Photoelectrochemical Systems for Efficient Solar Hydrogen Generation
Type: Oral
Date: Wednesday, 8th September 2021
08:30 - 10:00
Author(s): A. Sharma, S. Karuturi, D. Zhang, F. Beck, K.R. Catchpole
Presenter / Speaker: A. Sharma, ANU, Canberra, Australia
Event: Conference Conference
Session: 6CO.13 Solar Hydrogen
Topic: 6. 5 Energy System Integration
Summary / Abstract: Direct Solar hydrogen generation is a promising method for renewable hydrogen generation, where solar energy drives the generation of hydrogen and oxygen by molecular dissociation of water on a catalytic/semiconductor surface. Despite an enormous amount of work over the last few decades, direct solar hydrogen generation has not yet been implemented on large scale. Realizing solar-to-hydrogen (STH) efficiencies close to 20% using low cost systems is a critical step in ensuring the commercial viability of large scale solar hydrogen generation [1]. We have recently demonstrated high-efficiency, stand-alone solar hydrogen generation using perovskite- silicon tandem photo absorbers in a photoelectrochemical cell (Fig. 1(a)). We developed a p+nn+Si/Ti/Pt photocathode with an applied bias photon-to-current efficiency (ABPE) of 14.1%, with a stability of three days under continuous illumination. Solar to hydrogen conversion efficiency of 17.6% is achieved on combining with semitransparent perovskite solar cell of optimised bandgap and IrRu anode.