Mobility and photovoltaic performance studies on polymer blends: Effects of side chains volume fraction
Journal of Materials Chemistry
Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenbergerstrasse 69, Linz 4040, Austria; Addis Ababa University, Faculty of Science, Department of Chemistry, PO Box 1176, Addis Ababa, Ethiopia
A 1:1 mixture of two thiophene based poly(p-phenylene ethynylene)-alt- poly(p-phenylene vinylene)s denoted DO-PThE1-PPV2 (D1) and MEH-PThE1-PPV2 (D2), consisting of the same conjugated backbone but different types and volume fraction of alkoxy side chains on the phenylene ethynylene unit, has led to enhanced charge carrier mobility (measured using CELIV technique) as compared to the individual polymers. The resulting ternary blend with PC60BM showed better photovoltaic performance as compared to binary blends from the single polymers mixed with PCBM. This is due to the improved active layer nanomorphology in the ternary system as revealed by AFM studies. © 2011 The Royal Society of Chemistry.
Active Layer; AFM; Binary blends; Conjugated backbones; Nanomorphologies; P-phenylene; Photovoltaic performance; Poly(p-phenylene vinylene)s; Side chains; Single polymers; Ternary blends; Conjugated polymers; Organic polymers; Photovoltaic effects; Polymer blends; Ternary systems; Thiophene; Titration; Carrier mobility