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  Low-dose (S)TEM elemental analysis of water and oxygen uptake in beam sensitive materials

Leijten, Z. J. W. A., Wirix, M. J. M., Strauss, M., Plitzko, J. M., de With, G., & Friedrich, H. (2020). Low-dose (S)TEM elemental analysis of water and oxygen uptake in beam sensitive materials. ULTRAMICROSCOPY, 208: UNSP 112855. doi:10.1016/j.ultramic.2019.112855.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9DEB-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C1E3-F
Genre: Journal Article

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 Creators:
Leijten, Z. J. W. A.1, Author
Wirix, M. J. M.1, Author
Strauss, M.2, Author              
Plitzko, J. M.3, Author              
de With, G.1, Author
Friedrich, H.1, Author
Affiliations:
1external, ou_persistent22              
2Scientific Service Groups, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565170              
3Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565142              

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Free keywords: RADIATION-DAMAGE; ELECTRON-MICROSCOPY; SOLAR-CELLS; CRYO-TEM; LIMITATIONS; TOMOGRAPHY; INTERFACES; FILMSLow-dose; cryo STEM-EELS; cryo EFTEM; Direct electron detector; Electron beam damage; Organic photovoltaics; Oxygen uptake; Water uptake;
 Abstract: The performance stability of organic photovoltaics (OPVs) is largely determined by their nanoscale morphology and composition and is highly dependent on the interaction with oxygen and water from air. Low-dose cryo(S)TEM techniques, in combination with OPV donor-acceptor model systems, can be used to assess oxygen- and water-uptake in the donor, acceptor and their interface. By determining a materials dependent critical electron dose from the decay of the oxygen K-edge intensity in Electron Energy Loss Spectra, we reliably measured oxygen- and water-uptake minimizing and correcting electron beam effects. With measurements below the dose limit the capability of STEM-EDX, EFTEM and STEM-EELS techniques are compared to qualitatively and quantitatively measure oxygen and water uptake in these OPV model systems. Here we demonstrate that oxygen and water is mainly taken up in acceptor-rich regions, and that specific oxygen uptake at the donor-acceptor interphase does not occur. STEM-EELS is shown to be the best suitable technique, enabling quantification of the local oxygen concentration in OPV model systems.

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Language(s): eng - English
 Dates: 20192020
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
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Title: ULTRAMICROSCOPY
Source Genre: Journal
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Publ. Info: RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS : ELSEVIER
Pages: - Volume / Issue: 208 Sequence Number: UNSP 112855 Start / End Page: - Identifier: ISSN: 0304-3991