MRS Meetings and Events

 

EL02.02.04 2023 MRS Spring Meeting

Rational Design of Photoelectrochemical Perovskite-BiVO4 Tandem Devices for Scalable Solar Fuel Production

When and Where

Apr 10, 2023
4:00pm - 4:15pm

Moscone West, Level 3, Room 3002

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
Metal halide perovskites have emerged as promising alternatives to commonly employed light absorbers for solar fuel synthesis, enabling unassisted photoelectrochemical (PEC) water splitting<sup>[1,3]</sup> and CO<sub>2</sub> reduction to syngas.<sup>[2,4]</sup> While the bare perovskite light absorber is rapidly degraded by moisture, recent developments in the device structure have led to substantial advances in the device stability. Here, we give an overview of the latest progress in perovskite PEC devices, introducing design principles to improve their performance and reliability. For this purpose, we will discuss the role of charge selective layers in increasing the device photocurrent and photovoltage, by fine-tuning the band alignment and enabling efficient charge separation. A further beneficial effect of hydrophobicity is revealed by comparing devices with different hole transport layers (HTLs).<sup>[1,3]</sup> On the manufacturing side, we will provide new insights into how appropriate encapsulation techniques can extend the device lifetime to a few days under operation in aqueous media.<sup>[1,2]</sup> To this end, we replace low melting alloys with graphite epoxy paste as a conductive, hydrophobic and low-cost encapsulant.<sup>[3,5]</sup> The combined advantages of these approaches are demonstrated in a perovskite-BiVO<sub>4</sub> tandem device archiving selective unassisted CO<sub>2</sub> reduction to syngas.<sup>[4]</sup> These design principles are successfully applied to an underexplored BiOI light absorber, increasing the photocathode stability towards hydrogen evolution from minutes to months.<sup>[6]</sup> Finally, we take a glance at the next steps required for scalable solar fuels production, showcasing our latest progress in terms of device manufacturing. A suitable choice of materials can decrease the device cost tenfold and expand the device functionality.<sup>[7]</sup> Such materials are compatible with large-scale, automated fabrication processes, which present the most potential towards future real-world applications.<sup>[8]</sup><br/> <br/>[1] Andrei, V. et al. <i>Adv. Energy Mater.</i> 2018, 8, 1801403.<br/>[2] Andrei, V.; Reuillard, B.; Reisner, E. <i>Nat. Mater.</i> 2020, 19, 189–194.<br/>[3] Pornrungroj, C.; Andrei, V et al. <i>Adv. Funct. Mater.</i> 2021, 31, 2008182.<br/>[4] Rahaman, M.; Andrei, V. et al. <i>Energy Environ. Sci.</i> 2020, 13, 3536–3543.<br/>[5] Andrei, V.; Bethke, K.; Rademann, K. <i>Phys. Chem. Chem. Phys.</i> 2016, 18, 10700–10707.<br/>[6] Andrei, V.; Jagt, R. A. et al. <i>Nat. Mater.</i> 2022. DOI: 10.1038/s41563-022-01262-w.<br/>[7] 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. <i>Nature </i>2022, 608, 518–522.<br/>[8] Sokol, K. P.; Andrei, V. <i>Nat. Rev. Mater.</i> 2022, 7, 251–253.

Symposium Organizers

Robert Hoye, Imperial College London
Maria Antonietta Loi, University of Groningen
Xuedan Ma, Argonne National Laboratory
Wanyi Nie, Los Alamos National Laboratory

Publishing Alliance

MRS publishes with Springer Nature