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    Solar Water Splitting: Over 17% Efficiency Stand-Alone Solar Water Splitting Enabled by Perovskite-Silicon Tandem Absorbers (Adv. Energy Mater. 28/2020)

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    Type
    Article
    Authors
    Karuturi, Siva Krishna
    Shen, Heping
    Sharma, Astha
    Beck, Fiona J.
    Varadhan, Purushothaman
    Duong, The
    Narangari, Parvathala Reddy
    Zhang, Doudou
    Wan, Yimao
    He, Jr-Hau cc
    Tan, Hark Hoe
    Jagadish, Chennupati
    Catchpole, Kylie
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Solar Center (KSC)
    Nano Energy Lab
    Physical Science and Engineering (PSE) Division
    Date
    2020-07-28
    Online Publication Date
    2020-07-28
    Print Publication Date
    2020-07
    Embargo End Date
    2021-07-28
    Submitted Date
    2020-02-28
    Permanent link to this record
    http://hdl.handle.net/10754/664534
    
    Metadata
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    Abstract
    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.202070122
    Publisher
    Wiley
    Journal
    Advanced Energy Materials
    DOI
    10.1002/aenm.202070122
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202070122
    ae974a485f413a2113503eed53cd6c53
    10.1002/aenm.202070122
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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