MRS Meetings and Events


EN02.08.70 2022 MRS Fall Meeting

Lightweight, Floating Perovskite-BiVO4 Tandem Devices for Scalable Artificial Photosynthesis

When and Where

Nov 30, 2022
8:00pm - 10:00pm

Hynes, Level 1, Hall A



Virgil Andrei1,Geani Ucoski1,Chanon Pornrungroj1,Demetra Achilleos1,Katarzyna Sokol1,Judith Driscoll1,Robert Hoye2,Richard Friend1,Erwin Reisner1

University of Cambridge1,Imperial College London2


Virgil Andrei1,Geani Ucoski1,Chanon Pornrungroj1,Demetra Achilleos1,Katarzyna Sokol1,Judith Driscoll1,Robert Hoye2,Richard Friend1,Erwin Reisner1

University of Cambridge1,Imperial College London2
Photoelectrochemical (PEC) artificial leaves hold the potential to lower the costs of sustainable solar fuel production by integrating light harvesting and catalysis within one compact device. However, current deposition techniques limit their scalability, while fragile and heavy bulk materials can affect their transport and deployment. Here, we demonstrate the fabrication of lightweight artificial leaves by employing thin, flexible substrates and carbonaceous protection layers.<sup>[1]</sup> Lead halide perovskite photocathodes deposited onto indium tin oxide coated polyethylene terephthalate achieve an activity of 4266 µmol H<sub>2</sub> g<sup>-1</sup> h<sup>-1</sup> using a platinum catalyst, whereas photocathodes with a molecular Co catalyst for CO<sub>2</sub> reduction attain a high CO:H<sub>2</sub> selectivity of 7.2 under a lower 0.1 sun irradiation. The corresponding lightweight perovskite-BiVO<sub>4</sub> PEC devices display unassisted solar-to-fuel efficiencies of 0.58% (H<sub>2</sub>) and 0.053% (CO), respectively. Their potential for scalability is demonstrated by 100 cm<sup>2</sup> standalone artificial leaves, which sustain a comparable performance and stability of ≈24 h to their 1.7 cm<sup>2</sup> counterparts. Bubbles formed under operation further enable the 30-100 mg cm<sup>-2</sup> devices to float, while lightweight reactors facilitate gas collection during outdoor testing on a river. The leaf-like PEC device bridges the gulf in weight between traditional solar fuel approaches, showcasing activities per gram comparable to photocatalytic suspensions and plant leaves.<sup>[1]</sup> The presented lightweight, floating systems are compatible with modern fabrication techniques,<sup>[2]</sup> and may enable open water applications, while avoiding competition with land use.<br/><br/>[1] Andrei, V.; Ucoski, G. M.; Pornrungroj, C.; Uswachoke, C.; Wang, Q.; Achilleos, D. S.; Kasap, H.; Sokol, K. P.; Jagt, R. A.; Lu, H.; Lawson, T.; Wagner, A.; Pike, S. D.; Wright, D. S.; Hoye, R. L. Z.; MacManus-Driscoll, J. L.; Joyce, H. J.; Friend, R. H.; Reisner, E., Nature 2022, 608, 518–522.<br/>[2] Sokol, K. P.; Andrei, V. Nat. Rev. Mater. 2022, 7, 251–253.



Symposium Organizers

Jin-Wook Lee, Sungkyunkwan University
Carolin Sutter-Fella, Lawrence Berkeley National Laboratory
Wolfgang Tress, Zurich University of Applied Sciences
Kai Zhu, National Renewable Energy Laboratory

Symposium Support

ACS Energy Letters
SKKU Insitute of Energy Science & Technology

Session Chairs

Jin-Wook Lee
Carolin Sutter-Fella
Wolfgang Tress

In this Session

Utilisation of PEDOT as a Hole Selective Layer for Reproducible Efficient Tin-Based Perovskite Solar Cells with the DMSO-Free Solvent System

Tuning the Surface Potential of Hybrid Perovskite Active Layers Through Interfacial Engineering Using Fluorinated Compounds

Hole-Transporting Self-Assembled Monolayer Enables 23.1%-Efficient Single-Crystal Perovskite Solar Cells with Enhanced Stability

Solvent Engineering of NiOx Solutions for Rapid Depositions as Hole Transporting Layers for Flexible Perovskite Solar Cells

Potentiometry of Operating Perovskite-Based Devices with Kelvin Probe Force Microscopy

Low Temperature Synthesized Y:SnO2 as an Effective Electron Transport Layer for Inverted Perovskite Solar Cells on Flexible ITO-PET Substrate

Enabling Perovskite/Perovskite/Silicon Triple Tandem Based on Transparent Conductive Adhesive Lamination Process

Defect-Stabilized Tin-Based Perovskite Solar Cells Enabled by Multi-Functional Molecular Additives

Perovskite-Based Multijunction Solar Cells for Efficient Continuous Solar-Assisted Water Splitting

In Situ Metrology of Hybrid Halide Perovskite Single Crystals—Investigating Growth Dynamics of Inverse Temperature Crystallisation

View More »

Publishing Alliance

MRS publishes with Springer Nature