Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 29: Poster: Organic semiconductors and hybrid organic-inorganic heterostructures / Organic photovoltaics

HL 29.10: Poster

Montag, 31. März 2014, 17:00–20:00, P2

Charge Carrier Mobility of a Quinquethiophene Derivative Deposited on Heated Substrates — •Julia Oelker, Johannes Widmer, Christian Koerner, and Karl Leo — Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden

The absorber material DCV5T-Me has been successfully used in small molecule organic solar cells. Fundamental properties of this material are of special interest to learn more about the mechanisms that lead to highly efficient solar cells. For organic solar cells with DCV5T-Me and C60 as donor-acceptor blend layer, the power conversion efficiency is strongly dependent on the substrate temperature during the deposition of the absorber layer. This parameter is known to change the morphology and the degree of disorder in the blend layer which affects the transport properties.

In this contribution, the carrier mobility as one of the key parameters to achieve highly efficient solar cells is investigated. Electric potential mapping by thickness variation (POEM) is applied to pip-hole-only-devices with DCV5T-Me:C60 as intrinsic layer to measure the hole mobility in the blend. The substrate temperature during the deposition of the intrinsic layer is varied to get particular insight into the influence of substrate heating.

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