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Determination of the valence band structure of an alkali phosphorus oxynitride glass: A synchrotron XPS study on LiPON

Schwöbel, André and Precht, Ruben and Motzko, Markus and Carrillo Solano, Mercedes A. and Calvet, Wolfram and Hausbrand, René and Jaegermann, Wolfram (2014):
Determination of the valence band structure of an alkali phosphorus oxynitride glass: A synchrotron XPS study on LiPON.
In: Applied Surface Science, Elsevier Science Publishing, pp. 55-60, 321, ISSN 01694332,
[Online-Edition: http://dx.doi.org/10.1016/j.apsusc.2014.09.174],
[Article]

Abstract

Lithium phosphorus oxynitride (LiPON) is a solid state electrolyte commonly used in thin film batteries (TFBs). Advanced TFBs face the issue of detrimental electrode–electrolyte interlayer formation, related to the electronic structure of the interface.

In this contribution, we study the valence band structure of LiPON using resonant photoemission and synchrotron photoemission with variable excitation energies. The identification of different valence band features is done according to the known valence band features of meta- and orthophosphates. Additionally we compare our results with partial density of states simulations from literature. We find that the valence band structure is similar to the known metaphosphates with an additional contribution of nitrogen states at the top of the valence band. From the results we conclude that synchrotron X-ray photoemission (XPS) is a useful tool to study the valence band structure of nitridated alkali phosphate glasses.

Item Type: Article
Erschienen: 2014
Creators: Schwöbel, André and Precht, Ruben and Motzko, Markus and Carrillo Solano, Mercedes A. and Calvet, Wolfram and Hausbrand, René and Jaegermann, Wolfram
Title: Determination of the valence band structure of an alkali phosphorus oxynitride glass: A synchrotron XPS study on LiPON
Language: English
Abstract:

Lithium phosphorus oxynitride (LiPON) is a solid state electrolyte commonly used in thin film batteries (TFBs). Advanced TFBs face the issue of detrimental electrode–electrolyte interlayer formation, related to the electronic structure of the interface.

In this contribution, we study the valence band structure of LiPON using resonant photoemission and synchrotron photoemission with variable excitation energies. The identification of different valence band features is done according to the known valence band features of meta- and orthophosphates. Additionally we compare our results with partial density of states simulations from literature. We find that the valence band structure is similar to the known metaphosphates with an additional contribution of nitrogen states at the top of the valence band. From the results we conclude that synchrotron X-ray photoemission (XPS) is a useful tool to study the valence band structure of nitridated alkali phosphate glasses.

Journal or Publication Title: Applied Surface Science
Volume: 321
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: LiPON, Solid electrolyte, Lithium phosphorus oxynitride, Resonant photoemission, Valence band
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 27 Feb 2015 10:11
Official URL: http://dx.doi.org/10.1016/j.apsusc.2014.09.174
Identification Number: doi:10.1016/j.apsusc.2014.09.174
Funders: The authors would like to thank the BMBF (13N11843) and Catrene (CT402) for funding in the 9D Sense project. , Additionally the authors would like to thank the BMBF (03KP801) for funding the UHV system DAISY-BAT.
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