The increasing interest in block copolymers originates not only from their potential technological advantages but also from their ability to naturally self-assemble into periodic ordered nanostructures. In this article, we emphasize methods by which block copolymer self-assembly can be utilized to rationally design and control the shape and dimension of resulting nanostructures and therefore to develop idealized morphologies. Incorporating these self-organized materials into optoelectronic device fabrication processes or directly into devices will lead to new insights into structure-property relationships and perhaps, ultimately, increases in device efficiency.

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