For qualitative and quantitative analysis of the composition of the sample surface and work function evaluation.
UPS is a method that measures the kinetic energy distribution of electrons emitted by ultraviolet light irradiation, providing insights into the valence states of the sample's surface (on the order of a few nanometers). On the other hand, it is also used to evaluate the work function of various metal materials by utilizing high energy resolution. Since it can be measured alongside XPS analysis, it is possible to investigate the qualitative and quantitative surface composition of the sample and the correlation between bonding states and work function values.
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basic information
By irradiating the sample with ultraviolet light that has an energy higher than the work function value of the measured sample, electrons are emitted from the surface of the sample. (Ultraviolet light: He I line 21.22 eV) From the kinetic energy distribution of the emitted electrons (right figure), the valence electronic states of the sample are obtained, and the work function is further determined using the following formula based on the spectral width.
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Applications/Examples of results
- Evaluation of work function for metal films such as Au, Ag, and Cu - Evaluation of work function for nitride films such as TiN - Evaluation of ionization potential for oxide semiconductors - Evaluation of valence band for solar cell materials
Detailed information
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Please consult with us first. ★ We will start by proposing an analysis plan ★ We can, of course, meet with you at your company. We will carefully explain the analysis results and leave no questions unanswered. Please contact us at 03-3749-2525 or info@mst.or.jp!
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We will hold a visiting seminar. ★ We offer free seminars with engineers visiting tailored to customer needs ★ Depending on your requests, we will introduce analytical techniques and explain analytical data. ◆ Examples of seminar content - A broad explanation of MST analytical methods - A detailed explanation of specific analytical methods from the principles - An explanation of the analytical data requested by the customer Please contact us at 03-3749-2525 or info@mst.or.jp!
Company information
MST is a foundation that provides contract analysis services. We possess various analytical instruments such as TEM, SIMS, and XRD to meet your analysis needs. Our knowledgeable sales representatives will propose appropriate analysis plans. We are also available for consultations at your company, of course. We have obtained ISO 9001 and ISO 27001 certifications. Please feel free to consult us for product development, identifying causes of defects, and patent investigations! MST will guide you to solutions for your "troubles"!
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