Jump to main content
Jump to site search

Issue 4, 2013
Previous Article Next Article

Organic solar cells featuring nanobowl structures

Author affiliations

Abstract

Although organic solar cells having a bilayer configuration provide continuous conducting pathways for carrier transport to the requisite electrodes, their efficiencies have remained low because of the short exciton diffusion lengths of organic semiconductors. In this paper, we describe unique spatial organic solar cells featuring nanobowl array structures that capture more light and generate more power than planar organic solar cells. To construct bilayer solar cells, we used electrochemical deposition (with polystyrene beads as the template) to fabricate poly(3,4-ethylenedioxythiophene) nanobowl arrays, functioning as the hole extraction layer, on indium tin oxide substrates and then deposited copper phthalocyanine and a fullerene (C60 or C70) to function as the active layer, onto the nanobowl arrays. By implementing this spatial structure, we could control the active layer's thickness, such that it would be suitable for exciton dissociation, while maintaining a high absorption of incident light (by increasing the absorber volume without decreasing the area of the donor–acceptor interface, such that the light path in the active layer was increased) and ensuring high exciton dissociation efficiency (by enlarging the donor–acceptor interface). Relative to an equally thick planar control active layer the photocurrent generated by such bilayer solar cells increased by approximately 90%.

Graphical abstract: Organic solar cells featuring nanobowl structures

Back to tab navigation

Publication details

The article was received on 19 Nov 2012, accepted on 30 Jan 2013 and first published on 30 Jan 2013


Article type: Paper
DOI: 10.1039/C3EE24128A
Energy Environ. Sci., 2013,6, 1192-1198

  •   Request permissions

    Organic solar cells featuring nanobowl structures

    H. Wei, J. Huang, C. Hsu, F. Chang, K. Ho and C. Chu, Energy Environ. Sci., 2013, 6, 1192
    DOI: 10.1039/C3EE24128A

Search articles by author

Spotlight

Advertisements