Hosokai, Takuya National Institute of Advanced Industrial Science and Technology
Matsuzaki, Hiroyuki National Institute of Advanced Industrial Science and Technology
Furube, Akihiro National Institute of Advanced Industrial Science and Technology|Tokushima University Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Nakamura, Ken National Institute of Advanced Industrial Science and Technology
An Nd3+:YAG pulsed laser was employed as a light source for two-photon photoemission from organic semiconducting thin films in low vacuum and air. Photoionization by the two-photon process was confirmed in both the environments by measuring photoemission current. By constructing a pump–probe system, photoemissions from transient species formed by the pump light irradiation were detected by probe light irradiation as a result of a linear increase in the photocurrent with the pump power via a one-photon process. Thus, we propose a novel method called two-photon photoelectron yield spectroscopy to determine the excited-state energy levels in ambient environments.
Applied Physics Express
The Japan Society of Applied Physics
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Science and Technology