This surface photovoltage spectrometer allows precise measurement of work function of different semiconducting and conducting materials with high precision and accuracy. The Kelvin probe system can be used in various type of surface studies, including: corrosion, adsorption/desorption, surface charging, catalytic activity and others.
It is an essential tool in investigation of photocatalysts, organic and inorganic semiconductors, solar cells and other photoactive materials and devices. With the help of this Kelvin probe/surface photovoltage spectrometer monitoring of photocorrosion of semiconductors, photodesorption and photocatalytic reactions in real time is also possible.
The device consists of an oscillating gold probe mounted on a firm stand with Z-axis motorized stage, electronic control units and a Faraday cage.
• A sample is placed on manual or motorized XYstage with motion range of 1.5 cm in either direction.
• The probe is attached to a Z-stage that can place it at a desired distance from a sample.
• A red laser pointer shows place where the probe will oscillate over during measurement.
• A USB microscope and a white LED are helpful once the system is covered with a Faraday cage.
• Light is delivered to the sample with liquid waveguide or optic fiber, so the possible EM interference from a light source is eliminated.
• In idle run or during storage the fragile gold probe is homed into a protected space to prevent accidental damage.
• The system is also equipped with the automatic sample height sensor.
Visit Princeton Scientific Corp on booth 314.