Bottom-up approaches to creating molecular multilayer assemblies using layer-by-layer (LbL) techniques give one the ability to tailor the surface properties of an interface through molecular control. LbL assembly methods can provide molecular level control of structure in one dimension from simple solution deposition processes. We have developed a versatile LbL fabrication method using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) or “click” chemistry in the construction of multilayer assemblies on oxide surfaces.1,2 These reactions occur in minutes at room temperature allowing for the facile creation of complex, covalently attached multilayer assemblies. Multilayers containing synthetic porphyrins, perylenes, and mixtures of the two have been constructed in order to highlight the versatility of this method. The fabrication of this new type of molecular multilayer thin film will be discussed along with characterization of the photophysical, electrochemical, and structural properties. Initial results pertaining to the use of these films as light harvesting systems in p-type dye sensitized solar cells will be presented.

 

1. Palomaki, P.K.B. and Dinolfo, P.H. Langmuir 2010, 26 (12), 9677-9685.

2. Palomaki, P.K.B.; Krawicz, A.; Dinolfo, P.H. Langmuir 2011, 27 (8), 4613-4622.