Controlling the three-dimensional distribution and the molecular assembly of organic semiconducting materials is a significant challenge for the advancement of organic electronics. Conjugated polymers (LCPs) exhibit very complex self-assembly behavior in both solution and solid state due to their structural flexibility, longer chain length, and wide molecular weight distribution. Such inherent properties lead to unorganized morphology during the traditional solvent-based thin film processes. To improve the utility of polymer-based devices, the nanoscale morphology has been investigated using the deposition of semiconducting nanoparticles (SNPs) that composite of both donor and acceptor conjugated polymers. This approach offers flexibility to control the distribution of both donor and acceptor components before the deposition process. Since the composition of the donor and acceptor is fixed, the microscale morphology can be achieved to optimize the optoelectronic response of a given nanoparticle formulation.<br/>Here, we describe a novel synthetic technique to make donor-acceptor core-shell nanoparticles derived from fused-arenes and conjugated polymers. The particle morphology, size, and shape were evaluated using TEM and AFM. The crystallinity and packing pattern of donor and acceptor within a single nanoparticle volme was analyzed using micro-area diffraction using TEM and SAXS. The photophysical and electronic properties will be studied. Their potential applicability for organic photovoltaics will also me assessed.

Donor-acceptor core-shell nanoparticles for organic photovoltaics

249th National Meeting (2015)

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