Photoinduced charge transfer and photovoltaic energy conversion in self-assembled N,N′-dioctyl-3,4,9,10-perylenedicarboximide nanoribbons

Karak, S.; Ray, S. K.; Dhar, A.
July 2010
Applied Physics Letters;7/26/2010, Vol. 97 Issue 4, p043306
Academic Journal
One-dimensional nanostructures like nanowires, nanoribbons, or nanobelts are attractive building blocks for optoelectronic device applications. Here we report the self-assembly of several micrometer long n-type organic nanoribbons with 100–200 nm of width from N,N′-dioctyl-3,4,9,10-perylenedicarboximide molecules. Significant change in absorption spectra above 550 nm indicates strong π-π stacking along the long axis of nanoribbons. Photovoltaic properties were investigated by mixing them with two well studied donor materials. Strong photoluminescence (PL) quenching and significant decrease in PL life time surmise efficient photoinduced charge transfer and exciton dissociation between nanostructures and donor materials, which leads to a power conversion efficiency of about 1%.


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