Influence of a ternary donor material on the morphology of a P3HT:PCBM blend for organic photovoltaic devices

Machui F, Rathgeber S, Li N, Ameri T, Brabec C (2012)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Journal of Materials Chemistry Royal Society of Chemistry

Book Volume: 22

Pages Range: 15570-15577

Journal Issue: 31

DOI: 10.1039/c2jm31882b

Abstract

A comparison of grazing incidence wide-angle X-ray scattering (GiWAXS) and differential scanning calorimetric measurements (DSC) was used to identify the influence of a dominantly amorphous small band gap polymer material poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene) -alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) on the crystallinity of a semi-crystalline polymer/fullerene composite. In binary blends the low band gap polymer does not influence the crystalline part of P3HT, but does influence the crystallinity of the fullerene. In ternary blends, a significant drop of the PCBM crystallinity is observed with increasing PCPDTBT content. Adding more than 20 wt% PCPDTBT to a P3HT:PCBM blend leads to a dramatic reduction of device efficiency, mainly due to short circuit current density and fill factor losses. This deterioration is attributed to the fact that addition of more than 20 wt% PCPDTBT to the host system strongly reduces crystallinity of the fullerene phase and electron transport in the ternary system. © 2012 The Royal Society of Chemistry.

Authors with CRIS profile

Florian Machui Institute Materials for Electronics and Energy Technology (i-MEET) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Tayebeh Ameri Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Universität Koblenz-Landau DE Germany (DE)

How to cite

APA:

Machui, F., Rathgeber, S., Li, N., Ameri, T., & Brabec, C. (2012). Influence of a ternary donor material on the morphology of a P3HT:PCBM blend for organic photovoltaic devices. Journal of Materials Chemistry, 22(31), 15570-15577. https://doi.org/10.1039/c2jm31882b

MLA:

Machui, Florian, et al. "Influence of a ternary donor material on the morphology of a P3HT:PCBM blend for organic photovoltaic devices." Journal of Materials Chemistry 22.31 (2012): 15570-15577.

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