Stabilization methods for small molecule dewetting on indium tin oxide substrates for organic photovoltaics

Jonathan Heidkamp; Felix Maye; Ayse Z. Turak

doi:10.1117/12.2036778

11 October 2013 Stabilization methods for small molecule dewetting on indium tin oxide substrates for organic photovoltaics

Jonathan Heidkamp, Felix Maye, Ayse Z. Turak

Author Affiliations +

Proceedings Volume 8915, Photonics North 2013; 891508 (2013) https://doi.org/10.1117/12.2036778
Event: Photonics North 2013, 2013, Ottawa, Canada

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.

Citation Download Citation

Jonathan Heidkamp, Felix Maye, and Ayse Z. Turak "Stabilization methods for small molecule dewetting on indium tin oxide substrates for organic photovoltaics", Proc. SPIE 8915, Photonics North 2013, 891508 (11 October 2013); https://doi.org/10.1117/12.2036778

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