Functionalized Rosette Nanotubes as Novel Electron Donor Materials for Solution-Processed Organic Photovoltaics
2015
Two self-assembling twin guanine-cytosine (G∧C) hybrid molecules featuring porphyrin (TPPO-(G∧C) 2 ) and oligothiophene groups (6T-(G∧C) 2 ) were synthesized. In organic solution, these molecules self-assemble into one-dimensional rosette nanotubes (RNTs) featuring the porphyrin or oligiothiophene groups on the outer surface. Using a combination of imaging and spectroscopic techniques we established the structure of the TPPO-(G∧C) 2 and 6T-(G∧C) 2 RNTs and compared the HOMO and LUMO energy levels with PC 61 BM, a well-known electron acceptor material. These studies, in combination with solid-state photoluminescence data of PC 61 BM-TPPO-(G∧C) 2 RNT blended thin films, indicates that these self-assembled nanomaterials have great potential as electron donor materials for solution-processed organic photovoltaics.
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