Project Org_Halb_Si_Zelle – Passivierung von Silizium-Solarzellen mit organischen Halbleitermolekülen mit neuem Prozess…

Basic data

Acronym:
Org_Halb_Si_Zelle
Title:
Passivierung von Silizium-Solarzellen mit organischen Halbleitermolekülen mit neuem Prozess zur gezielten Layer-Orientierung zur Wirkungsgradsteigerung
Duration:
01/01/2020 to 30/06/2022
Abstract / short description:
Single-crystalline Silicon wafers are used as substrates, which are the basic components of nowadays high- efficiency solar cells and are provided to us by the Fraunhofer-ISE. First, the surface of the wafer working as back-electrode is coated with an organic film of semiconducting molecules by means of vacuum- deposition: in this way, the surface is passivated from defects. Such coating step is repeated for 10-12 organic semiconducting materials. For each material, the Fraunhofer-ISE evaluates the quality of the surface passivation by means of charge-carrier lifetime measurements. The 2 materials exhibiting the best passivation ability are subsequently employed in passivation layers between back-electrode and basis of the solar cell, at the same time enhancing the absorption of the solar spectrum in the near-infrared range.
Investigation of the optical, morphological, structural, electronic and charge-transport properties of these semiconducting layers is carried out. The parameters for vacuum-deposition of the organic molecules are adjusted in close dependence of the results from these characterizations of functional properties, in order to optimize the efficiency of the solar cells.
Keywords:
organic semiconductor
organische Halbleiter
photovoltaics
Photovoltaik
surfaces
Oberflächen

Involved staff

Managers

Institute of Applied Physics (IAP)
Department of Physics, Faculty of Science

Local organizational units

Institute of Applied Physics (IAP)
Department of Physics
Faculty of Science
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