Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 41, Pages 17501-17508Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp105883p
Keywords
-
Funding
- NRC
Ask authors/readers for more resources
The three-dimensional characterization of third generation photovoltaic device structures at the nanometer scale is essential to the development of efficient, reliable, and inexpensive solar cell technologies. Electron tomography is a powerful method for three-dimensional characterization; however, the application of this method to die organic materials systems that comprise typical high-efficiency devices is complicated by the difficulty in generating contrast from the compositionally similar materials. Herein we report the application of low-loss energy-filtered transmission electron microscopy as a method of generating spectroscopic contrast from a common organic bulk-heterojunction thin film consisting of a polymer donor and a fullerene-derivative acceptor. Spectral imaging methods combined with principal component analysis are used to characterize the contrast generation mechanism and to determine the optimum data acquisition parameters for this particular combination of organic phases. A proof of method for using the low-loss spectral signal as a basis for electron tomography is presented. and the advantages and drawbacks or the technique as applied to multiphase organic systems relative to the more commonly employed bright-field imaging approach are outlined.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available