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Proceedings Paper

Stabilization methods for small molecule dewetting on indium tin oxide substrates for organic photovoltaics
Author(s): Jonathan Heidkamp; Felix Maye; Ayse Z. Turak
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Paper Abstract

Heterojunctions are inherent in and essential to all molecular electronic devices. In organic solar cells, in particular, heterojunctions play a defining role in all of the major electrical processes and particularly in stability. The p-type organic molecule diindenoperylene (DIP) is an interesting photoactive organic molecule that forms inherently unstable interfaces within organic solar cell devices. Using scanning probe microscopies, supported by x-ray scattering, we examined the stability of inorganic/organic interfaces at both charge extraction electrodes. The DIP morphology can be stabilized by: 1. roughening the ITO surface, which disrupts the molecular packing, 2. using an interlayer such as PEDOT:PSS, which modifies the surface energy, or 3. depositing a dielectric layer, LiF, which pins the DIP grain boundaries. Any combination of the approaches would lead to significant improvements in solar cell lifetime.

Paper Details

Date Published: 11 October 2013
PDF: 9 pages
Proc. SPIE 8915, Photonics North 2013, 891508 (11 October 2013); doi: 10.1117/12.2036778
Show Author Affiliations
Jonathan Heidkamp, Max-Planck-Institut für Intelligente Systeme (Germany)
Felix Maye, Max-Planck-Institut für Intelligente Systeme (Germany)
Ayse Z. Turak, Max-Planck-Institut für Intelligente Systeme (Germany)
McMaster Univ. (Canada)

Published in SPIE Proceedings Vol. 8915:
Photonics North 2013
Pavel Cheben; Jens Schmid; Caroline Boudoux; Lawrence R. Chen; André Delâge; Siegfried Janz; Raman Kashyap; David J. Lockwood; Hans-Peter Loock; Zetian Mi, Editor(s)

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