Solar Water Splitting: Over 17% Efficiency Stand-Alone Solar Water Splitting Enabled by Perovskite-Silicon Tandem Absorbers (Adv. Energy Mater. 28/2020)
Type
ArticleAuthors
Karuturi, Siva KrishnaShen, Heping
Sharma, Astha
Beck, Fiona J.
Varadhan, Purushothaman
Duong, The
Narangari, Parvathala Reddy
Zhang, Doudou
Wan, Yimao
He, Jr-Hau

Tan, Hark Hoe
Jagadish, Chennupati
Catchpole, Kylie
KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
KAUST Solar Center (KSC)
Nano Energy Lab
Physical Science and Engineering (PSE) Division
Date
2020-07-28Online Publication Date
2020-07-28Print Publication Date
2020-07Embargo End Date
2021-07-28Submitted Date
2020-02-28Permanent link to this record
http://hdl.handle.net/10754/664534
Metadata
Show full item recordAbstract
Realizing 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.Citation
Karuturi, 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.202070122Publisher
WileyJournal
Advanced Energy MaterialsAdditional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202070122ae974a485f413a2113503eed53cd6c53
10.1002/aenm.202070122