IMPROVEMENT OF ORGANIC-INORGANIC INTERFACE PROPERTIES OF ORGANIC SOLAR CELLS THROUGH CHEMICAL MONOLAYER PASSIVATION OF INDIUM-TIN-OXIDE ELECTRODE

摘要

In organic optoelectronic devices the charge transport properties at the interface between inorganictransparent conductive oxide (TCO) electrode and organic films are crucial for efficient performance. In order toimprove charge carrier injection the TCO surface has to be modified. In the case of indium-tin-oxide (ITO) and metalphthalocyanines we propose to apply a chemical surface treatment to the ITO electrode. Both aromatic and acidicpassivations by a molecular monolayer improve the performance of a phthalocyanine/C_(60) bi-layer bulkheterojunctionsolar cell significantly. Combining these two types of passivation in one molecule allows substitutingadditional buffer layers. Furthermore geometrically designing the molecule with combined properties allowsinfluencing the absorber layer crystal growth.