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Ambient Pressure Photoemission Spectroscopy with Nitrogen Environment

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APS04-N2-RH with ambient pressure photoemission spectroscopy, nitrogen environment and scanning capabilities

The APS04-N2-RH incorporates a tuneable deep ultra-violet (UV) source outputting 3.4 - 7.0 eV, for absolute work function and highest occupied molecular orbital (HOMO) measurements, a surface photovoltage spectroscopy (SPS) module outputting 400 - 1000 nm for Voc and Eg measurements, together with a 50 x 50 mm scanning area for planar relative work function measurements (Fermi level). This system allows absolute work function determination in the presence of a nitrogen atmosphere. Our dedicated software allows the user full control of the energy scan ranges, tip potential, signal gain and averaging. Cube or square root fitting of the emission data over user-selectable photon energy, normalised light intensity and baseline correction.

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Systems & specifications


Tip material / diameter 2 mm stainless steel tip
Absolute work function resolution ≤ 0.05 meV
Contact potential difference resolution ≤ 0.001 eV
Sample scanning 50 x 50 mm
Atmospheric control Nitrogen and RH control
Relative humidity range 20-85%
Height control 25 mm automatic
Kelvin probe mode and PE mode CPD and PE measurements
Work function measurement time PE measurements in < 5 minutes
Optical system Colour camera with zoom lens for monitoring and positioning
Oscilloscope Digital TFT oscilloscope for real time signal
Test sample Gold, aluminium, silver and silicon solar cell test samples
Breadboard footprint 900 x 600 mm
Control supplied PC control with dedicated software
Detection system Off-null with parasitic capacity rejection
Warranty Twelve months
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KP Technology
Burn Street, Wick, Caithness, KW1 5EH, Scotland

Telephone: +44 (0)1955 602 777
Fax: +44 (0)1955 602 555
Email: sales@kelvinprobe.com

(c) 2021 KP Technology Ltd

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