Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 91: Sustainable photovoltaics with earth-abundant materials I (organized by DS)

HL 91.5: Invited Talk

Thursday, April 3, 2014, 11:45–12:15, CHE 91

Core shell ZnO nanowire heterostructures for solar cells — •Vincent Consonni — Laboratoire des Matériaux et du Génie Physique, Grenoble INP - CNRS, Minatec, 3 parvis Louis Néel 38016 Grenoble, France

ZnO nanowires (NWs) have received increasing interest due to their potential applications for instance in photovoltaic devices via core shell heterostructures. The core can be composed of ZnO NWs as electron transporting layer and the shell can comprise an absorbing layer such as a direct band gap semiconductor or a chemical dye in order to form type II heterostructures [1,2]. In this work, the structural properties and electron scattering mechanisms are investigated for SnO2:F thin films acting as front electrodes in nanostructured solar cells made from ZnO NW heterostructures [3]. A special emphasis is made on the formation mechanisms of ZnO NWs in solution by specifically focusing on polarity and crystal orientation effects [4]. Also, the light absorption properties of core shell ZnO NW heterostructures are studied by rigorous coupled wave analysis in order to design nanostructured solar cells. Eventually, several types of solar cells made from core shell ZnO NW heterostructures are fabricated by using different types of absorbing layers and their photovoltaic performances are tested under dark and AM 1.5G standard illumination conditions [1,2].

[1] V. Consonni et al., Appl. Phys. Lett. 98, 111906 (2011). [2] E. Puyoo et al., J. Phys. Chem. C 116, 18117 (2012). [3] V. Consonni et al., Acta Mater. 61, 22 (2013). [4] S. Guillemin et al., J. Phys. Chem. C 117, 20738 (2013).