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High carrier mobility along the [111] orientation in Cu2O photoelectrodes

Pan, Linfeng (författare)
Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.;Univ Cambridge, Cavendish Lab, Cambridge, England.;Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.;Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, Lausanne, Switzerland.
Dai, Linjie (författare)
Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.;Univ Cambridge, Cavendish Lab, Cambridge, England.
Burton, Oliver J. (författare)
Univ Cambridge, Dept Engn, Cambridge, England.
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Chen, Lu (författare)
Ecole Polytech Fed Lausanne, Lab Organometall & Med Chem, Inst Chem Sci & Engn, Lausanne, Switzerland.;Univ Cambridge, Yusuf Hamied Dept Chem, Cambridge, England.
Andrei, Virgil (författare)
Univ Cambridge, Cavendish Lab, Cambridge, England.;Univ Cambridge, Yusuf Hamied Dept Chem, Cambridge, England.
Zhang, Youcheng (författare)
Univ Cambridge, Cavendish Lab, Cambridge, England.
Ren, Dan (författare)
Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.
Cheng, Jinshui (författare)
Nankai Univ, Frontiers Sci Ctr New Organ Matter, Engn Res Ctr Thin Film Photoelect Technol, Renewable Energy Convers & Storage Ctr,Minist Educ, Tianjin, Peoples R China.
Wu, Linxiao (författare)
Nankai Univ, Frontiers Sci Ctr New Organ Matter, Engn Res Ctr Thin Film Photoelect Technol, Renewable Energy Convers & Storage Ctr,Minist Educ, Tianjin, Peoples R China.
Frohna, Kyle (författare)
Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.
Abfalterer, Anna (författare)
Univ Cambridge, Cavendish Lab, Cambridge, England.
Yang, Terry Chien-Jen (författare)
Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.;Univ Cambridge, Cavendish Lab, Cambridge, England.
Niu, Wenzhe (författare)
Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.
Xia, Meng (författare)
Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.
Hofmann, Stephan (författare)
Univ Cambridge, Dept Engn, Cambridge, England.
Dyson, Paul J. (författare)
Ecole Polytech Fed Lausanne, Lab Organometall & Med Chem, Inst Chem Sci & Engn, Lausanne, Switzerland.
Reisner, Erwin (författare)
Univ Cambridge, Yusuf Hamied Dept Chem, Cambridge, England.
Sirringhaus, Henning (författare)
Univ Cambridge, Cavendish Lab, Cambridge, England.
Luo, Jingshan (författare)
Nankai Univ, Frontiers Sci Ctr New Organ Matter, Engn Res Ctr Thin Film Photoelect Technol, Renewable Energy Convers & Storage Ctr,Minist Educ, Tianjin, Peoples R China.
Hagfeldt, Anders (författare)
Uppsala universitet,Fysikalisk kemi,Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, Lausanne, Switzerland.
Graetzel, Michael (författare)
Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.
Stranks, Samuel D. (författare)
Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.;Univ Cambridge, Cavendish Lab, Cambridge, England.
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Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England;Univ Cambridge, Cavendish Lab, Cambridge, England.;Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, Lausanne, Switzerland.;Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, Lausanne, Switzerland. Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge, England.;Univ Cambridge, Cavendish Lab, Cambridge, England. (creator_code:org_t)
Nature Publishing Group, 2024
2024
Engelska.
Ingår i: Nature. - : Nature Publishing Group. - 0028-0836 .- 1476-4687. ; 628:8009
Relaterad länk:
https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • Solar fuels offer a promising approach to provide sustainable fuels by harnessing sunlight(1,2). Following a decade of advancement, Cu2O photocathodes are capable of delivering a performance comparable to that of photoelectrodes with established photovoltaic materials(3,4,5). However, considerable bulk charge carrier recombination that is poorly understood still limits further advances in performance(6). Here we demonstrate performance of Cu2O photocathodes beyond the state-of-the-art by exploiting a new conceptual understanding of carrier recombination and transport in single-crystal Cu2O thin films. Using ambient liquid-phase epitaxy, we present a new method to grow single-crystal Cu2O samples with three crystal orientations. Broadband femtosecond transient reflection spectroscopy measurements were used to quantify anisotropic optoelectronic properties, through which the carrier mobility along the [111] direction was found to be an order of magnitude higher than those along other orientations. Driven by these findings, we developed a polycrystalline Cu2O photocathode with an extraordinarily pure (111) orientation and (111) terminating facets using a simple and low-cost method, which delivers 7 mA cm(-2) current density (more than 70% improvement compared to that of state-of-the-art electrodeposited devices) at 0.5 V versus a reversible hydrogen electrode under air mass 1.5 G illumination, and stable operation over at least 120 h.

Ämnesord

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)
NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

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