| AVS 63rd International Symposium & Exhibition | |
| In-Situ and Operando Spectroscopy and Microscopy for Catalysts, Surfaces, & Materials Focus Topic | Thursday Sessions |
| Session IS-ThP |
| Session: | In-Situ and Operando Spectroscopy and Microscopy for Catalysts, Surfaces, & Materials Poster Session |
| Presenter: | John Åhlund, Scienta Omicron, Sweden |
| Correspondent: | Click to Email |
Ambient pressure photoelectron spectroscopy (APPES) is a rapidly developing technique, suitable for studies in the field of energy harvesting, e.g. solar cells and energy storage, e.g. batteries. We have developed two analysers, capable of measuring samples with a surrounding gas pressure in the mbar range.
Here we present the design and performance of these two new hemispherical electron energy analyzers, the Scienta Omicron HiPP-2 analyser, designed for energies ranging from x-ray photoelectron spectroscopy (XPS) to hard x-ray photoelectron spectroscopy (HAXPES) and the Scienta Omicron HiPP-3 analyser, designed for XPS energies. Where the latter also having imaging capabilities.
For laboratories both analyzers can be equipped with an Al Kα X-ray anode, as demonstrated in Eriksson et al RSI 85(2014)075119 and Edwards et al, NIMA, 785(2015)191. Firstly the performance of the analysers in combination with Al Kα X-rays is demonstrated using standard test samples and procedures, including a demonstration of the HiPP-3 spatial performance under ambient pressure conditions. Secondly the performance is linked to a general discussion about sample to first aperture distance (Kahk et al, JEPEC, 205(2015)57).
Finally we will demonstrate the performance of the HiPP-2 analyzer with applications examples from a dye-sensitized solar cell interacting with water (Eriksson et al Top. Cal. 59(2016)583) and a method to study the battery solid/liquid interface. For the first time the presence of a liquid electrolyte was realized during photoemission measurements (Maibach et al RSI 86(2015)044101).