Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 61: Focus: Fundamental Physics of Perovskites II - organized by Lukas Schmidt-Mende and Vladimir Dyakonov
CPP 61.3: Vortrag
Donnerstag, 15. März 2018, 10:15–10:30, C 130
Visualizing and suppressing interfacial recombination in high efficiency large area pin-perovskite solar cells — •Martin Stolterfoht1, Christian M. Wolff1, Shanshan Zhang1,2, José A. Márquez Prieto3, Charles J. Hages3, Daniel Rothhardt1, Thomas Unold3, Steve Albrecht4, Paul L. Burn2, Paul Meredith5, and Dieter Neher1 — 1University of Potsdam, Potsdam-Golm, Germany — 2The University of Queensland, Brisbane, Australia — 3Helmholtz-Zentrum-Berlin, Berlin, Germany — 4Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin, Germany — 5Swansea University, Swansea, United Kingdom
The current generation of perovskite solar cells (PSCs) is predominantly limited by non-radiative recombination, either through trap-assisted recombination in the absorber layer, or via minority carrier recombination at the interface to the transport layers. Using transient and absolute photoluminescence imaging we are able to visualize all relevant non-radiative recombination pathways in planar pin-type PSCs. We find significant quasi-Fermi level splitting losses (135 meV) in the perovskite bulk, while interface recombination results in an additional energy loss of 80 meV at each individual interface. These losses define the open-circuit voltage of the complete cell. Inserting ultrathin interlayers between the perovskite and transport layers allows substantial reduction of these interfacial losses at both the p-and-n-contacts. Using this knowledge and approach, we demonstrate stable 1 cm2 PSCs surpassing 20% efficiency (19.83% certified) with record fill factor (> 81%), high V_OC (1.17V) and near unity manufacturing yield.