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

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-C61-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.

Authors:
 [1];  [1];  [1];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. School of Polymers and High Performance Materials, The University of Southern Mississippi, 118 College Drive, #5050, Hattiesburg, Mississippi 39406, United States
  2. Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
1372248
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Applied Materials and Interfaces; Journal Volume: 9; Journal Issue: 27
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; AFM; GIWAXS; Kelvin probe force microscopy; morphology; organic photovoltaics; solvent vapor annealing

Citation Formats

Moore, Levi M. J., Bhattacharya, Mithun, Wu, Qi, Youm, Sang Gil, Nesterov, Evgueni E., and Morgan, Sarah E. Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering. United States: N. p., 2017. Web. doi:10.1021/acsami.7b04218.
Moore, Levi M. J., Bhattacharya, Mithun, Wu, Qi, Youm, Sang Gil, Nesterov, Evgueni E., & Morgan, Sarah E. Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering. United States. doi:10.1021/acsami.7b04218.
Moore, Levi M. J., Bhattacharya, Mithun, Wu, Qi, Youm, Sang Gil, Nesterov, Evgueni E., and Morgan, Sarah E. Wed . "Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering". United States. doi:10.1021/acsami.7b04218.
@article{osti_1372248,
title = {Three-Dimensional Morphology Control Yielding Enhanced Hole Mobility in Air-Processed Organic Photovoltaics: Demonstration with Grazing-Incidence Wide-Angle X-ray Scattering},
author = {Moore, Levi M. J. and Bhattacharya, Mithun and Wu, Qi and Youm, Sang Gil and Nesterov, Evgueni E. and Morgan, Sarah E.},
abstractNote = {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-C61-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.},
doi = {10.1021/acsami.7b04218},
journal = {ACS Applied Materials and Interfaces},
number = 27,
volume = 9,
place = {United States},
year = {Wed Jun 28 00:00:00 EDT 2017},
month = {Wed Jun 28 00:00:00 EDT 2017}
}