MRS Meetings and Events

 

EL04.06.02 2023 MRS Spring Meeting

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

When and Where

Apr 13, 2023
11:00am - 11:15am

Moscone West, Level 3, Room 3004

Presenter

Co-Author(s)

Virgil Andrei1,Geani Ucoski1,Robert Jagt1,Chanon Pornrungroj1,Demetra Achilleos1,Katarzyna Sokol1,Judith MacManus-Driscoll1,Robert Hoye2,Richard Friend1,Erwin Reisner1

University of Cambridge1,Imperial College London2

Abstract

Virgil Andrei1,Geani Ucoski1,Robert Jagt1,Chanon Pornrungroj1,Demetra Achilleos1,Katarzyna Sokol1,Judith MacManus-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

Felix Deschler, University of Heidelberg
Linn Leppert, University of Twente
Sebastian Reyes-Lillo, Universidad Andres Bello
Carolin Sutter-Fella, Lawrence Berkeley National Laboratory

Publishing Alliance

MRS publishes with Springer Nature