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Title: Enhanced absorption in tandem solar cells by applying hydrogenated In{sub 2}O{sub 3} as electrode

To realize the high efficiency potential of perovskite/chalcopyrite tandem solar cells in modules, hydrogenated In{sub 2}O{sub 3} (IO:H) as electrode is investigated. IO:H with an electron mobility of 100 cm{sup 2} V{sup −1} s{sup −1} is demonstrated. Compared to the conventional Sn doped In{sub 2}O{sub 3} (ITO), IO:H exhibits a decreased electron concentration and leads to almost no sub-bandgap absorption up to the wavelength of 1200 nm. Without a trade-off between transparency and lateral resistance in the IO:H electrode, the tandem cell keeps increasing in efficiency as the IO:H thickness increases and efficiencies above 22% are calculated. In contrast, the cells with ITO as electrode perform much worse due to the severe parasitic absorption in ITO. This indicates that IO:H has the potential to lead to high efficiencies, which is otherwise constrained by the parasitic absorption in conventional transparent conductive oxide electrode for tandem solar cells in modules.
Authors:
;  [1] ; ;  [2] ;  [1] ;  [3]
  1. Nanooptische Konzepte für die PV, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany)
  2. Institut für Heterogene Materialsysteme, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin (Germany)
  3. (Germany)
Publication Date:
OSTI Identifier:
22486119
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; CHALCOPYRITE; DOPED MATERIALS; EFFICIENCY; ELECTRODES; ELECTRON MOBILITY; HYDROGENATION; INDIUM OXIDES; OPACITY; PEROVSKITE; SOLAR CELLS; THICKNESS; WAVELENGTHS