Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 17: Focus Session: Thin Film Photovoltaic Materials and Solar Cells I

DS 17.1: Invited Talk

Wednesday, March 13, 2013, 09:30–10:00, H32

Meso-Superstructured Perovskite Solar Cells — •Henry J. Snaith — University of Oxford, Parks Road, Oxford, OX13PU, UK

Combining both ultimately low cost materials and production with a high efficiency solar technology has thus far been elusive. Low cost materials, such as organics and oxides, tend to suffer from fundamental energy losses required to separate excitons and collect free charge carriers in electronically disordered semiconductors. For organic and dye-sensitized solar cells this energy loss, defined as the difference between the optical band gap and the open-circuit voltage, is typically 0.65 to 0.8 eV, but for a "perfect" single junction solar cell the theoretical minimum losses, as determined by the Shockley Quasar limit are in the region of 0.25 eV. Here I will present a new hybrid solar cell concept based on a printable mesoporous superstructured perovskite absorber combined with an organic hole conductor, which we term a "meso-superstructured solar cell" (MSSC). The minimal fundamental losses are as small as 0.45 eV, and the full sun power conversion efficiency is in excess of 10% in a single junction device. I will describe the concept, operating principles, recent progress.