http://dx.doi.org/10.1021/ja501711m">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Topological considerations for the design of molecular donors with multiple absorbing units

Language

English

Abstract

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 (GIWAXS) 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. © 2014 American Chemical Society.

Publication Date

2014

Source Publication Title

Journal of the American Chemical Society

Volume

136

Issue

15

Start Page

5591

End Page

5594

Publisher

American Chemical Society

ISSN (print)

00027863

ISSN (electronic)

15205126

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