Affiliation:
1. Instituto de Ciencia Molecular Universidad de Valencia Calle Catedrático J. Beltrán 2 Paterna 46980 Spain
2. CEA LITEN INES Univ Grenoble Alpes Grenoble F‐38000 France
Abstract
AbstractPerovskite solar cells have become promising candidates for thin‐film photovoltaics (PV), but many record cells suffer from losses in current (≈3–4 mA cm−2). This is due to the choice of superstrate configurations (i.e., glass‐side illumination) and thin absorber layers, typically on the order of ≈500 nm. Illumination through a top transparent conductive oxide electrode (substrate configuration) using LiF and Al2Ox as anti‐reflective coatings leads to reflectance losses below 1% is demonstrated. When combined with 1 µm thick absorber layers, substrate configurated bifacial devices have power conversion efficiencies >20%, with minimized reflection losses approaching 98% of their detailed‐balance limits and higher Jsc than their monofacial counterparts. Further analysis is conducted to show there is still a significant fraction of current lost due to poor charge‐carrier extraction (e.g., resistive or low mobility contacts). This is studied by a direct comparison of photoluminescence at short‐circuit versus open‐circuit estimating a 4.5% loss in charge‐carrier collection.
Funder
Spanish National Plan for Scientific and Technical Research and Innovation
European Climate, Infrastructure and Environment Executive Agency
H2020 European Research Council
Cited by
3 articles.
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