Solar Water Splitting: Over 17% Efficiency Stand-Alone Solar Water Splitting Enabled by Perovskite-Silicon Tandem Absorbers (Adv. Energy Mater. 28/2020)
AuthorsKaruturi, Siva Krishna
Beck, Fiona J.
Narangari, Parvathala Reddy
Tan, Hark Hoe
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Computer, Electrical, and Mathematical Sciences and Engineering (CEMSE) DivisionKing Abdullah University of Science & Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
Embargo End Date2021-07-28
Permanent link to this recordhttp://hdl.handle.net/10754/664534
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AbstractRealizing solar-to-hydrogen (STH) efficiencies close to 20% using low-cost semiconductors remains a major step toward accomplishing the practical viability of photoelectrochemical (PEC) hydrogen generation technologies. Dual-absorber tandem cells combining inexpensive semiconductors are a promising strategy to achieve high STH efficiencies at a reasonable cost. Here, a perovskite photovoltaic biased silicon (Si) photoelectrode is demonstrated for highly efficient stand-alone solar water splitting. A p+nn+ -Si/Ti/Pt photocathode is shown to present a remarkable photon-to-current efficiency of 14.1% under biased condition and stability over three days under continuous illumination. Upon pairing with a semitransparent mixed perovskite solar cell of an appropriate bandgap with state-of-the-art performance, an unprecedented 17.6% STH efficiency is achieved for self-driven solar water splitting. Modeling and analysis of the dual-absorber PEC system reveal that further work into replacing the noble-metal catalyst materials with earth-abundant elements and improvement of perovskite fill factor will pave the way for the realization of a low-cost high-efficiency PEC system.
CitationKaruturi, S. K., Shen, H., Sharma, A., Beck, F. J., Varadhan, P., Duong, T., … Catchpole, K. (2020). Solar Water Splitting: Over 17% Efficiency Stand-Alone Solar Water Splitting Enabled by Perovskite-Silicon Tandem Absorbers (Adv. Energy Mater. 28/2020). Advanced Energy Materials, 10(28), 2070122. doi:10.1002/aenm.202070122
JournalAdvanced Energy Materials