Tel: +40 230 216147
Fax: +40 230 520080
Email: rotaru [at] eed.usv.ro

Facilities

Last update: 18 Sep 2014 @ 09:06am

Our setup is suitable for charge transport and optical properties investigation, in a large range of temperatures (77 K – 870 K). The setup is composed of a Keithley 6340 connected with a Linkam HFS600-P Probe temperature cell mounted on a Fluorescence microscope Olympus BX51. The microscope is equipped with a 5 Mb CCD Camera (or optionally with a photodiode) and an Ocean Optics spectrometer (with a spectral range: 200 nm – 1100 nm).

Keithley 6340 - Sub-Femtoamp Remote SourceMeter combines the voltage and current sourcing and measurement functions with sensitivity, noise, and input resistance specifications superior to electrometers.
- Current measurement range: 1 fA to 100 mA;
- Voltage ranges from 200 mV to 200 V;
- Remote PreAmp can be located at the signal source to minimize cable noise;
- >1016Ω input resistance on voltage measurements;
- High speed - up to 2000 readings/second;
- Up to 6½-digit resolution;
- Fast characterization of components with programmable digital I/O and interfaces.

Linkam HFS600-P Probe temperature cell is equipped with 4 positional gold tipped, tungsten probes that can be connected to BNC electrical connectors within the sample chamber and enable the user to make electrical measurements on the sample, while accurately controlling the temperature inside a gas tight environment. The sample is simply placed on the heating element and the probes moved manually to make contact at the appropriate points. Probes have excellent positional resolution enabling precise contact points to be made easily. Measure 2 and 4 points probe resistivity at variable temperature (77 K – 870 K). The optical access is assured by an optical window situated on the top of the cell.

Poza Linkam   measurements...

This setup, fully automatized, is suitable for various investigations such as: Thermal stimulated currents (TSC) analysis, I-V characteristics, Photostimulated currents (PSC) analysis, Photostimulated luminescence (PSL) or Fluorescence analysis.

measurements... Temperature dependence of the Optical Density (OD) (Left), of the dc electrical conductivity (Center) and IV characteristics recorded, at different temperatures in heating mode, (Right) on [Fe(Htrz)2(trz)](BF4) spin crossover complex.

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