Print Email Facebook Twitter Application of metal, metal-oxide, and silicon-oxide based intermediate reflective layers for current matching in autonomous high-voltage multijunction photovoltaic devices Title Application of metal, metal-oxide, and silicon-oxide based intermediate reflective layers for current matching in autonomous high-voltage multijunction photovoltaic devices Author de Vrijer, T. (TU Delft Photovoltaic Materials and Devices) Miedema, Sander (Student TU Delft) Blackstone, Thijs (Student TU Delft) van Nijen, D.A. (TU Delft Photovoltaic Materials and Devices) Han, C. (TU Delft Photovoltaic Materials and Devices) Smets, A.H.M. (TU Delft Photovoltaic Materials and Devices) Date 2022 Abstract A logical next step for achieving a cost price reduction per Watt peak of photovoltaics (PV) is multijunction PV devices. In two-terminal multijunction PV devices, the photo-current generated in each subcell should be matched. Intermediate reflective layers (IRLs) are widely employed in multijunction devices to increase reflection at the interface between subcells to enhance current generation in the subcell(s) positioned before the IRL, in reference to the incident light. In this work, the results of over 65 multijunction devices are presented, in order to explore the effect of different current matching approaches. The influence of variations in absorber thickness as well as thickness variations of different IRLs based on silicon-oxide, various transparent conductive oxides (TCO), and metallic layers on all-silicon multijunction PV devices is studied. Specifically, hybrid, 2-terminal, monolithically integrated silicon heterojunction (SHJ) and thin film nanocrystalline silicon (nc-Si:H) and amorphous silicon (a-Si:H) tandem and triple junction devices are processed. Based on these experiments, certain design rules for optimal current matching operation in multijunction devices are formulated. Finally, taking these design rules into account, record all-silicon multijunction devices are processed. Conversion efficiencies close 15% and (Formula presented.) V are demonstrated for triple junction SHJ/nc-Si:H/a-Si:H devices. Such conversion efficiencies for a wireless, high-voltage wafer-based all-silicon 2-terminal multijunction PV device opens the way for efficient autonomous solar-to-fuel synthesis systems as well as other wireless innovative approaches in which the multijunction solar cell is used not only as a photovoltaic current-voltage generator, but also as an ion-exchange membrane, electrochemical catalysts, and/or optical transmittance filter. Subject amorphous siliconintermediate reflective layermultijunction PVnanocrystalline siliconsilicon oxidesolar to fuelthin film silicontransparent conductive oxidetunnel recombination junction To reference this document use: http://resolver.tudelft.nl/uuid:65656223-2574-4f19-b67d-717aac8fa6d9 DOI https://doi.org/10.1002/pip.3600 ISSN 1062-7995 Source Progress in Photovoltaics: research and applications, 30 (12), 1400-1409 Part of collection Institutional Repository Document type journal article Rights © 2022 T. de Vrijer, Sander Miedema, Thijs Blackstone, D.A. van Nijen, C. Han, A.H.M. Smets Files PDF Progress_in_Photovoltaics ... ediate.pdf 6.97 MB Close viewer /islandora/object/uuid:65656223-2574-4f19-b67d-717aac8fa6d9/datastream/OBJ/view