Introducing a New Potential Figure of Merit for Evaluating Microstructure Stability in Photovoltaic Polymer-Fullerene Blends

Journal article
(Original article)


Publication Details

Author(s): Perea JD, Langner S, Salvador MF, Sanchez-Lengeling B, Li N, Zhang C, Jarvas G, Kontos J, Dallos A, Aspuru-Guzik A, Brabec C
Journal: Journal of Physical Chemistry C
Publisher: American Chemical Society
Publication year: 2017
Volume: 121
Journal issue: 33
Pages range: 18153-18161
ISSN: 1932-7455
Language: English


Abstract


A theoretical understanding of the microstructure of organic semiconducting polymers and blends is vital to further advance the optoelectronic device performance of organic electronics. We outline the theoretical framework of a combined numerical approach based on polymeric solution theory to study the microstructure of polymer:small molecule blends. We feed the results of ab initio density functional theory quantum chemistry calculations into an artificial neural network for the determination of solubility parameters. These solubility parameters are used to calculate Flory-Huggings intermolecular parameters. We further show that the theoretical values are in line with experimentally determined data. On the basis of the Flory-Huggings parameters, we establish a figure of merit as a relative metric for assessing the phase diagrams of organic semiconducting blends in thin films. This is demonstrated for polymer:fullerene blend films on the basis of the prototypical polymers poly(3-hexylthiophene-2,5-diyl) (P3HT) and poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3-di(2-octyldodecyl)-2,2,5,2;5,2-quaterthiophen-5,5-diyl)] (PffBT4T-2OD). After confirming the applicability of our model with a broader range of materials and differences in molecular weight, we suggest that this combined model should be able to inform design criteria and processing guidelines for existing and new high performance semiconducting blends for organic electronics applications with ideal and stable solid state morphology. (Graph Presented). © 2017 American Chemical Society.



FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Langner, Stefan
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Salvador, Michael Filipe Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Zhang, Chaohong Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)


External institutions
Harvard University
University of Pannonia / Pannon Egyetem


How to cite

APA:
Perea, J.D., Langner, S., Salvador, M.F., Sanchez-Lengeling, B., Li, N., Zhang, C.,... Brabec, C. (2017). Introducing a New Potential Figure of Merit for Evaluating Microstructure Stability in Photovoltaic Polymer-Fullerene Blends. Journal of Physical Chemistry C, 121(33), 18153-18161. https://dx.doi.org/10.1021/acs.jpcc.7b03228

MLA:
Perea, Jose Dario, et al. "Introducing a New Potential Figure of Merit for Evaluating Microstructure Stability in Photovoltaic Polymer-Fullerene Blends." Journal of Physical Chemistry C 121.33 (2017): 18153-18161.

BibTeX: 

Last updated on 2018-10-11 at 20:50