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[Analysis Case] Evaluation of the State of the Electrode/Organic Layer Interface in Organic EL Devices

C0094.jpg
C0094.jpg

[Analysis Case] Evaluation of the State of the Electrode/Organic Layer Interface in Organic EL Devices

The process will be carried out from pretreatment to XPS measurement under an inert gas atmosphere.

We physically peeled off the buffer layer/Alq3 interface and conducted XPS analysis on the peeled surface (buffer layer side). By peeling in an inert gas atmosphere, we were able to expose the interface without destroying the chemical structure, and by transporting it to the XPS device while maintaining the inert gas atmosphere, we minimized post-peeling alterations (such as oxidation and moisture absorption). The main component of the buffer layer is LiF, and it was suggested that some of it may have oxidized. By controlling the atmosphere, it is possible to evaluate the oxidation states of metal elements such as Al and Li due to differences in film formation methods, treatment methods, and organic layers.

Related Link - https://www.mst.or.jp/casestudy/tabid/1318/pdid/31…

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