Lai, Lai Fan and Love, John A. and Sharenko, Alexander and Coughlin, Jessica E. and Gupta, Vinay and Tretiak, Sergei and Nguyen, Thuc-Quyen and Wong, Wai-Yeung and Bazan, Guillermo C. (2014) Topological Considerations for the Design of Molecular Donors with Multiple Absorbing Units. Journal of the American Chemical Society, 136 (15). pp. 5591-5594. ISSN 0002-7863

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The molecule AT1, with two weakly conjugated chromophores, was designed, synthesized, and examined within the context of its film forming tendencies. While the addition of the second chromophore to the central core enables broadening of the absorption spectrum, this change is mostly apparent in films that are grown slowly. Grazing incidence X-ray scattering (GI-WAXS) analysis indicates that these spectral characteristics correspond to an increase in solid state ordering. This information, in combination with differential scanning calorimetry, suggests that the overall molecular shape provides a kinetic barrier to crystallization. As a result, one finds the absence of molecular order when AT1 is combined with PC71BM in solution-cast blends. These findings highlight the importance of molecular topology when designing molecular components for solar cell devices.

Item Type: Article
Additional Information: Copyright for this article belongs to M/S American Chemical Society.
Subjects: Chemistry
Depositing User: Dr. Rajpal Walke
Date Deposited: 23 Nov 2015 10:36
Last Modified: 23 Nov 2015 10:36

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