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The influence of substrate and top electrode on the crystallization dynamics of P3HT: PCBM blends

Lilliu, Samuele, Agostinelli, Tiziano, Hampton, Mark, Pires, Ellis, Nelson, Jenny and Macdonald, J. Emyr 2012. The influence of substrate and top electrode on the crystallization dynamics of P3HT: PCBM blends. Energy Procedia 31 , pp. 60-68. 10.1016/j.egypro.2012.11.165

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Abstract

Substrate and top electrode effects on P3HT lamellar crystallization, were studied using the full device structure of a bulk-hetorojunction P3HT:PCBM organic solar cell, during thermal annealing. P3HT: PCBM chlorobenzene solutions (50 wt %) were spin coated on quartz, HMDS treated SiO2, SiO2/PEDOT: PSS, ITO/PEDOT: PSS. The structural evolution of these thick (∼100nm) films was probed during a realistic device-processing annealing cycle at 140°C for ∼53 minutes by time-resolved synchrotron Grazing Incidence X-Ray Diffraction (GI-XRD). The 20 nm- thick coated Aluminium layer on top of ITO/PEDOT: PSS/P3HT: PCBM acts as a nucleation site for the P3HT crystalline growth during annealing, increasing the number of the edge-on lamellae, and preferentially increasing the domain size of face on and edge-on lamellae, with minor growth of the randomly oriented lamellae.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Elsevier
ISSN: 1876-6102
Last Modified: 30 Nov 2018 22:07
URI: http://orca.cf.ac.uk/id/eprint/115376

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