Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 23: POSTER Functional Organic Thin Films
CPP 23.46: Poster
Donnerstag, 30. März 2006, 17:00–19:00, P2
High Temperature Stable Solar Cells — •Rudolf Lessmann, Martin Pfeiffer, and Karl Leo — Institut für Angewandte Photophysik - Technische Universität Dresden
We present an efficient MIP solar cell with p-doped layer using organic dopants that shows only low degradation upon 100 hours irradiation with a full sun at 80 oC and even withstands heating to 105 oC for some hours. The active layer is formed by a blend of buckminsterfullerene (C60) and zinc-phthalocyanine (ZnPc); for the hole transport layer, a large triarylamine-based amorphous wide gap material with high glass transition temperature (NPD2)is used. The device structure is ITO / C60 (5 nm) / C60 : ZnPc [2:1] (30 nm) / NPD2 (5 nm) / p : NPD2 (40 nm) / p : ZnPc (10 nm) / Au (30 nm). The organic p-dopant was provided by NOVALED GmbH. It is used instead of the widely used F4TCNQ because of its better thermal stability. Devices with good performance and high fillfactors up to 53% are obtained when grown with substrate temperature of 110 oC for the active layer and 40 oC for the p-doped layer. The power efficiency of these cells, working at ambient temperature, is around 1.5%.