Jump to main content
Jump to site search

Issue 5, 2013
Previous Article Next Article

Controlling morphology and molecular packing of alkane substituted phthalocyanine blend bulk heterojunction solar cells

Author affiliations

Abstract

Systematic changes in the exocyclic substitution of a core phthalocyanine platform tune the absorption properties to yield commercially viable dyes that function as the primary light absorbers in organic bulk heterojunction solar cells. Blends of these complementary phthalocyanines absorb a broader portion of the solar spectrum compared to a single dye, thereby improving solar cell performance. We correlate grazing incidence small angle X-ray scattering data with solar cell performance to elucidate the role of the nanomorphology of active layers composed of blends of phthalocyanines and a fullerene derivative. A highly reproducible device architecture is used to ensure accuracy and is relevant to films for solar windows in urban settings. We demonstrate that the number and structure of the exocyclic motifs dictate phase formation, hierarchical organization, and nanostructure, thus can be employed to tailor active layer morphology to enhance exciton dissociation and charge collection efficiencies in the photovoltaic devices. These studies reveal that disordered films make better solar cells, short alkanes increase the optical density of the active layer, and branched alkanes inhibit unproductive homogeneous molecular alignment.

Graphical abstract: Controlling morphology and molecular packing of alkane substituted phthalocyanine blend bulk heterojunction solar cells

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 24 Sep 2012, accepted on 23 Oct 2012 and first published on 08 Nov 2012


Article type: Paper
DOI: 10.1039/C2TA00415A
Citation: J. Mater. Chem. A, 2013,1, 1557-1565
  •   Request permissions

    Controlling morphology and molecular packing of alkane substituted phthalocyanine blend bulk heterojunction solar cells

    M. J. Jurow, B. A. Hageman, E. DiMasi, C. Nam, C. Pabon, C. T. Black and C. M. Drain, J. Mater. Chem. A, 2013, 1, 1557
    DOI: 10.1039/C2TA00415A

Search articles by author