The AC-2S Series (AC-2S / AC-2S Pro α / AC-2S Pro β) use principles of Photoemission Yield Spectroscopy in Air (PYSA). The principle is used for quick & easy measurements of work function and ionization potential. It eliminates the need for measurements in a vacuum.
The AC-2 open counter counts the individual low intensity photoelectrons emitted, when the sample surface is irradiated with weak low-energy UV light in air. Compared to conventional surface analysis, in which high-energy X-rays are passed through the sample in a vacuum, this analysis technique causes minimal damage to the sample.
The AC Series is widely used around the world in Universities and Research Facilities, with over 2,000 related articles published in scientific journals.
Smaller & lower priced than previous models.
Includes often-requested multipoint measurement & repeated measurement functions.
Allows analysis after importing AC-2/3/5 data.
Incorporates flat-plate open counter enabling photoelectron count rates of up to 4,000 cps.
・Ionisation potential measurement of organic light-emitting diodes and photoreceptors for photocopiers.
・Tribology research on hard disks and magnetic tape.
・Semiconductor and lead frame surface oxididation state measurement.
・Detection of molecular level film contamination of precision electronic materials.
・Ionisation potential measurement of the following functional materials.
Organic light-emitting diodes, organic solar cells, organic field-effect transistors, photoreceptor materials for photocopiers, perovskite solar cells, quantum dots, carbon nanomaterials, catalyst materials, storage batteries, fuel cells, semiconductor materials (e.g., Si, GaN, GaAs), transparent conductive film (e.g., ITO, FTO).
| Product category |
Photoemission Yield Spectroscopy in Air |
| Model | AC-2S |
| Detection principle | Photoemission Yield Spectroscopy in Air (detector: low-energy photoelectron counting) |
| Photoelectron detector | Flat-plate open counter |
| UV energy range | 3.4 - 6.2 eV (364 - 200 nm) |
| Minimum UV intensity | 1.0 nW or less (at 5.9 eV) |
| Maximum UV intensity | 500.0 nW or greater (at 5.9 eV) |
| Repeatability (standard deviation) | Work function 0.02 eV (sample: Au plate) |
| UV light source | D2 lamp |
| UV spot size | Up to 4 mm × 4 mm (varies according to energy due to chromatic aberration of converging lens) |
| Maximum photoelectron count rate | 4,000 cps |
| Spectrometer | Grating monochromator |
| Maximum sample size | Area up to 50 mm × 50 mm, thickness up to 10 mm |
| Temperature/humidity range | Temperature 15 °C - 35 °C (no sudden changes), up to 60 %RH (no condensation), dew point -30 °C or higher |
| Power source | 100 V - 240 V AC 50/60 Hz 5A (max.) * Excluding control PC |
| External dimensions | LC light source: approx. 480 mm (W) × 450 mm (D) × 317 mm (H) DC measurement unit: approx. 465 mm (W) × 450 mm (D) × 360 mm (H) |
| Weight | LC light source: approx. 25 kg DC measurement unit: approx. 31 kg *Excluding control PC |
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