Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Organic Electronics and Photovoltaics III (DS jointly with CPP, HL, O)
O 23.7: Vortrag
Montag, 31. März 2014, 19:30–19:45, CHE 91
Solution-based planarization layers for organic solar cells on flexible silver nanowire transparent electrodes — •Jan Ludwig Bormann1, Franz Selzer1, Nelli Weiß2, Lars Müller-Meskamp1, and Karl Leo1 — 1Institut für Angewandte Photophysik, TU Dresden — 2Physikalische Chemie, TU Dresden
Flexible transparent electrodes made of silver nanowires (AgNWs) are an emerging research field for different optoelectronic devices such as organic transistors, organic light emitting diodes (OLED) and organic photovoltaics (OPV). They exhibit excellent electrical and optical properties (sheet resistance of 11 Ohm/sq at 85% transmittance) and are suitable for the application on flexible substrates. These transparent electrodes show high roughness and therefore require a planarization layer for fabricating efficient small molecule devices.
In this work, solution-based organic materials are processed with spin coating to planarize the AgNW electrode. A solution processed small molecule layer acts as planarizing layer and as hole transport layer in organic solar cells with a bulkheterojunction comprising the fullerene C60 as acceptor and different small molecule donor layers (oligothiophenes and phtalocyanines) . The efficiency of these devices is comparable or even better to reference devices with indium tin oxide (ITO) as transparent electrode.