Campus Units
Mechanical Engineering, Electrical and Computer Engineering, Materials Science and Engineering
Document Type
Article
Publication Date
2012
Journal or Book Title
Journal of Applied Physics
Volume
112
Issue
6
First Page
064316-1
Last Page
064316-6
DOI
10.1063/1.4752864
Abstract
The bulk heterojunction (BHJ) nanomorphology in organic solar cells strongly affects the final efficiency of the device. Progress in experimental techniques now allows visualization of the complex 3D BHJ morphology. It is, therefore, important to characterize the topological properties of the morphology in order to quantify the link between morphology features and performance. Here, we introduce a suite of morphology descriptors which encode the complex nature of the multi-stage photovoltaic process in the BHJ. These morphology descriptors are easily determined using an approach based on converting the morphology into an equivalent weighted, labeled, undirected graph. We show how these descriptors can be used to interrogate BHJ morphologies, allow identification of bottlenecks in the photovoltaic process, and conduct quantitative comparison between morphologies with respect to each sub-process in the photovoltaic phenomena. This framework provides a simple and easy-to-use characterization tool that can be used to unravel the impact of morphology on complex transport phenomena.
Rights
Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Copyright Owner
American Institute of Physics
Copyright Date
2012
Language
en
File Format
application/pdf
Recommended Citation
Wodo, Olga; Tirthapura, Srikanta; Chaudhary, Sumit; and Ganapathysubramanian, Baskar, "Computational characterization of bulk heterojunction nanomorphology" (2012). Electrical and Computer Engineering Publications. 93.
https://lib.dr.iastate.edu/ece_pubs/93
Included in
Electrical and Computer Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons
Comments
The following article appeared in Journal of Applied Physics 112, 064316 (2012); and may be found at doi: 10.1063/1.4752864.