Time reservation of equipment

Licensed users can make time reservations for the Raman/SPM/X-ray equipment by following the above links.

In order to book one of the conference rooms in the physics building, follow the link below:

Glove boxes

Two interconnected glove boxes filled with nitrogen gas: The one to the left is a "dry box" (Mecalab, Mecabox 80-1) for testing and storage of samples and devices, and the one to the right is a "wet box" (VAC, OMNI-Lab 2) for solvent processing.

Operational instructions for the wet box

Thermal evaporator

The dry box is directly connected via its interior to a thermal evaporator (Leybold Vacuum, UNIVEX 350 G), which is equipped with a substrate heater and two thermal sources.

The interconnections between the glove boxes and the thermal evaporator allows for a complete device assembly line without exposure to the ambient atmosphere.

Operational instructions for the thermal evaporator

Semiconductor characterization system

The semiconductor characterization system (Keithley, 4200-SCS) allows for accurate current measurements, down to 10-14 A, with three independent source-measure units. The system can be connected via triax cables to either a probe station consisting of four microprobers (Signatone), positioned within a Faraday cage or to a vacuum cell with optical access. The latter setup allows for measurements under high vacuum (p < 10-6 mBar) or inert gas atmosphere in the temperature range of 100-700 K. The system is in addition compatible with a Raman spectrometer, and thus allows for simultaneous spectroscopic and electrical characterization.

Potentiostat-galvanostat

A computer-controlled potentiostat and galvanostat, with an integrated frequency analyser module (FRA2) for (electrochemical) impedance spectroscopy (PGSTAT302/FRA2; GPES software, compliance voltage = 30 V and bandwidth > 1 MHz). The FRA2 module allows for both potentiostatic and galvanostatic impedance measurements over a wide frequency range (10 µHz - 1MHz) and with very high resolution (0.003%). The wide range of numerical methods implemented in the GPES software allows for a high-quality data analysis.

The test system includes specifically designed electrodes for both aqueous and non-aqueous measurements (e.g., Pt, Au and Al working electrodes, Pt counter electrodes, Ag/Ag+ quasi-reference electrodes, and Ag/AgCl reference electrodes). The Autolab computer can be connected to the Ar-filled wet box, so that sample preparation and characterization can be done without exposure to ambient atmosphere. The system allows for a variety of measurements (e.g., cyclic voltammetry, chronocoulometry, linear sweep voltammetry, current and potential step measurements). The system also allows for I-R compensation.

Operational instructions for the Autolab system

Spin coaters

The wetbox is equipped with a spin-coating system (APT-Polos MCD200-NPP, APT Germany) and a hot plate a with magnetic stirrer. The spin-coater is normally operated from the front panel. (However, it can be operated with the LPT relay contact and pre-programmed for long-period work with a wide range of adjustable parameters).

Operational instructions for the spin-coating system

Optical-access vacuum cryostat

An optical-access vacuum cryostat (Advanced Research Systems, LC-1) with a temperature controller (Lake Shore, LS-321) and a turbo pump system (Leybold Vacuum, Turbovac 151C). The cryostat allows for a complete optoelectronic characterization over the temperature interval of 77-500K at a pressure < 10-5 mBar.

This is accomplished using a computer-controlled source-measure unit (Keithley 2400), a calibrated photo diode (Hamamatsu S9219-01) connected to a multimeter (HP34401A), a spectrometer (Ocean Optics, USB2000-FL), and a digital camera (Cannon EOS 300D, 6.3 mega pixels) equipped with a macro lens (EF 100mm f/2.8 Macro USM).

Operational instructions for the temperature controller

Mask aligner

english

Electron-beam evaporator

A water-cooled electron beam evaporator (Leybold-Heraeus ESV-6) connected to a TURBOVAC 450 vacuum pump (Leybold-Vacuum), which allows for deposition under a vaccuum of p < 10-4 mBar.

Operational voltage range: 6-12kV, maximum electron beam power: 6kW, maximum cathode current: 30A, free evaporation angle: 110 degrees, smallest beam size app.: 8x5 mm.

Operational instructions for the electron beam evaporator