Abstract
The photoelectron yield spectroscope (PYS) applies the photoelectric effect and detects the photocurrent emitted from a sample when light of a specific wavelength is irradiated to a sample. Work function or ionization potential of samples can be measured using PYS. X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy are usually employed as methods for measuring their electronic structures. However, their methods can only be measured in high vacuum. PYS can be used when measuring in the atmosphere. In this work, PYS was developed. Gold, aluminum, ITO, and MTO were used as samples and their work function or ionization potential were measured using PYS.
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