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New Article in Advanced Materials:

Highly Crystalline Films of PCPDTBT with Branched Side Chains by Solvent Vapor Crystallization: Influence on Opto-Electronic Properties
November 14, 2014;

Florian S. U. Fischer, Daniel Trefz, Justus Back, Navaphun Kayunkid, Benjamin Tornow, Steve Albrecht, Kevin G. Yager, Gurpreet Singh, Alamgir Karim, Dieter Neher, Martin Brinkmann, and Sabine Ludwigs

PCPDTBT, a marginally crystallizable polymer, is crystallized into a new crystal structure using solvent vapor annealing. Highly ordered areas with three different polymer chain orientations are identified using TEM/ED, GIWAXS and polarized Raman spectroscopy. Optical and structural properties differ significantly from films prepared by standard device preparation protocols. Bilayer solar cells however show similar performance. 

Adv. Mater. 2014, accepted