4.8 Article

Transparent Stacked Photoanodes with Efficient Light Management for Solar-Driven Photoelectrochemical Cells

期刊

ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 8, 页码 10181-10190

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c21405

关键词

photovoltaic-assisted photoanode; transparent photovoltaic (TPV); photoelectrochemical (PEC) cell; transparent stacked PEC system; metal-oxide

资金

  1. Basic Science Research Program through the National Research Foundation by the Ministry of Education of Korea [NRF -2020R1A2C1009480, 2020R1I1A1A01068573]
  2. Brain Pool Program - Ministry of Science and ICT [NRF-2020H1D3A2A02085884]
  3. National Research Foundation of Korea [2020R1I1A1A01068573] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The implementation of transparent photoanodes using metal-oxide junctions has shown promising results in improving the efficiency of photoelectrochemical cells for solar-driven hydrogen generation. The study demonstrates the potential of stacked photoanodes with PTPE cells to enhance photocurrent, providing a pathway for the development of robust on-site energy generation systems.
Solar-driven hydrogen generation is one of the most promising approaches for building a sustainable energy system. Photovoltaic-assisted photoanodes can help to reduce the overpotential of water splitting in photoelectrochemical (PEC) cells. Transparent photoanodes can improve light-conversion efficiency by absorbing high-energy photons while transmitting lower energy photons to the photocathode for hydrogen production. In this work, transparent photoanodes were implemented by forming metal-oxide junctions of NiO/TiO2 heterostructures for creating the photovoltaic effect. The photovoltaic-induced transparent photoelectrode (PTPE) provides the photovoltage (0.7 V), which efficiently reduces the onset potential voltage by -0.38 V versus the reversible hydrogen electrode (RHE), as compared to 0.17 V versus RHE for a single-TiO2 photoanode. The PEC cell has a high photocurrent of 1.68 mA at 1.23 V with respect to the RHE. The chemical endurance of metal-oxides maintains the stability of the PTPE for over 100 h in an alkaline electrolyte of 0.1 M KOH. The results of this study reveal that combining multiple PTPE cells to create a stacked photoanode enhances the photocurrent roughly in proportion to the number of PTPE cells. This design scheme for optimizing the light-conversion efficiency in a PTPE-photoanode system is promising for creating robust systems for on-site energy producers.

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