TY - JOUR
T1 - Over 17% Efficiency Stand-Alone Solar Water Splitting Enabled by Perovskite-Silicon Tandem Absorbers
AU - Karuturi, Siva Krishna
AU - Shen, Heping
AU - Sharma, Astha
AU - Beck, Fiona J.
AU - Varadhan, Purushothaman
AU - Duong, The
AU - Narangari, Parvathala Reddy
AU - Zhang, Doudou
AU - Wan, Yimao
AU - He, Jr-Hau
AU - Tan, Hark Hoe
AU - Jagadish, Chennupati
AU - Catchpole, Kylie
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: S.K.K. and H.S. contributed equally to this work. The financial support from the Australian government through the Australian Research Council (ARC) and Australian Renewable Energy Agency (ARENA) is gratefully acknowledged. Access to the facilities of the Australian National Fabrication Facility (ANFF) is also gratefully acknowledged.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/663719
UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202000772
U2 - 10.1002/aenm.202000772
DO - 10.1002/aenm.202000772
M3 - Article
SN - 1614-6832
SP - 2000772
JO - Advanced Energy Materials
JF - Advanced Energy Materials
ER -
