"Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility i" by Levi M. Moore, Mithun Bhattacharya et al.

Faculty Publications

Title

Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering

Authors

Levi M. Moore, School of Polymers and High Performance Materials, The University of Southern Mississippi , 118 College Drive, #5050, Hattiesburg, Mississippi 39406, United States.
Mithun Bhattacharya, School of Polymers and High Performance Materials, The University of Southern Mississippi , 118 College Drive, #5050, Hattiesburg, Mississippi 39406, United States.
Qi Wu, School of Polymers and High Performance Materials, The University of Southern Mississippi , 118 College Drive, #5050, Hattiesburg, Mississippi 39406, United States.
Sang Gil Youm, Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States.
Evgueni E. Nesterov, Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States.
Sarah E. Morgan, School of Polymers and High Performance Materials, The University of Southern Mississippi , 118 College Drive, #5050, Hattiesburg, Mississippi 39406, United States.

Document Type

Article

Publication Date

7-12-2017

Abstract

Polymer organic photovoltaic (OPV) device performance is defined by the three-dimensional morphology of the phase-separated domains in the active layer. Here, we determine the evolution of morphology through different stages of tailored solvent vapor and thermal annealing techniques in air-processed poly(3-hexylthiophene-2,5-diyl)/phenyl-C-butyric acid methyl ester-based OPV blends. A comparative evaluation of the effect of solvent type used for vapor annealing was performed using grazing-incidence wide-angle X-ray scattering, atomic force microscopy, and UV-vis spectroscopy to probe the active-layer morphology. A nonhalogenated orthogonal solvent was found to impart controlled morphological features within the exciton diffusion length scales, enhanced absorbance, greater crystallinity, increased paracrystalline disorder, and improved charge-carrier mobility. Low-boiling, fast-diffusing isopropanol allowed the greatest control over the nanoscale structure of the solvents evaluated and yielded a cocontinuous morphology with narrowed domains and enhanced paths for the charge carrier to reach the anode.

Publication Source (Journal or Book title)

ACS applied materials & interfaces

First Page

22764

Last Page

22772

Recommended Citation

Moore, L. M., Bhattacharya, M., Wu, Q., Youm, S. G., Nesterov, E. E., & Morgan, S. E. (2017). Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering. ACS applied materials & interfaces, 9 (27), 22764-22772. https://doi.org/10.1021/acsami.7b04218

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