Bias-Free Solar-to-Hydrogen Conversion in a BiVO4/PM6:Y6 Compact Tandem with Optically Balanced Light Absorption

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外文摘要：The high voltage required to overcome the thermodynamic threshold and the complicated kinetics of the water splitting reaction limit the efficiency of single semiconductor-based photoelectrochemistry.A semiconductor/solar cell tandem structure has been theoretically demonstrated as a viable path to achieve an efficient direct transformation of sunlight into chemical energy.However,compact designs exhibiting the indispensable optimally balanced light absorption have not been demonstrated.In the current work,we design and implement a compact tandem providing the complementary absorption of a highly transparent BiVO4 photoanode and a PM6:Y6 solar cell.Such bandgap combination approaches the optimal to reach the solar-to-hydrogen(STH)conversion upper limit for tandem photoelectrochemical cells(PECs).We demonstrate that,by using a photonic multilayer structure to adequately balance sunlight absorption among both tandem materials,a 25％increase in the bias-free STH conversion can be achieved,setting a clear path to take compact tandem PECs to the theoretical limit performance.

外文关键词：

bismuth vanadatecompact tandemorganic solar cellsphotonic multilayerssolar-to-hydrogen conversion

作者：

Catarina G.Ferreira、Constanza Sansierra、Francisco Bernal-Texca、Mingyu Zhang、Carles Ros、Jordi Martorell

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作者单位：

ICFO-Institut de Ciències Fotòniques,The Barcelona Institute of Science and Technology,Castelldefels 08860,Barcelona,Spain

Departament de Física,Universitat Politècnica de Catalunya,Terrassa 08222,Spain

基金：

European Commission through the LICROX projectMinisterio de Ciencia e InnovaciónMinisterio de Ciencia e InnovaciónFundació Cel lex,Fundació Mir-Puig,and Generalitat de Catalunya through Centres de Recerca de CatalunyaAgencia Estatal de InvestigaciónMinisterio de Ciencia e Innovación/Agencia Estatal de InvestigaciónSevero Ochoa Excellence Postdoctoral Fellowship

项目编号：

951843CEX2019-000910-SPID2020-112650RB-I00PRE2018-084881FJC2020-043223-ICEX2019-000910-S

出版年：

2024

DOI：

10.1002/eem2.12679

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(4)