PVT Reactor for Growth of Organic Single Crystals
The growth of single crystals by physical vapor transport (PVT) occurs in a laminar flow of He (2-5 sccm) in a modest temperature gradient. The growth quartz tube (20 mm inner diameter) heated up to 250-330°C is placed in a copper heat-stabilizing tube (100°C). The reactor is equipped with flow and temperature controllers and a precision voltage source (Keithley 2200), which is controlled by a computer.
High vacuum sublimation purification system for organic semiconductors
A high-vacuum sublimation purification apparatus for organic semiconductors is based on the PVT reactor. The spatial separation of the original material into fractions occurs at low pressure along a smooth temperature gradient. High vacuum (up to 3×10-7mbar) is achieved using a turbomolecular pump, and a smooth temperature gradient – using two independent heating cords (in the sublimation area and in the deposition area), which provides fine tuning of suitable conditions for a wide range of materials (M<1000).
CVD Reactor for Parylene Deposition
It is exploited for chemical vapor deposition (CVD) of poly(para-xylylene) film (parylene) used as a dielectric in field-effect transistors. The reactor is equipped with two heaters (120 and 700°C), a nitrogen trap, a rotary pump and a control panel.
Scales Acculab ALC-80d4
The scales, equipped with a windproof chamber and level adjustment, has a value of graduation of 0.1 mg, enables weighing up to 80 g.
Photo Surface Processor PL16-110 (Sen Lights)
The UV-ozone cleaner is used to clean and modify solid surfaces.
Vacuum Drying Oven LT-VO/20 (Labtex)
The oven for vacuum drying materials has a volume of 25 litres with a temperature control up to 250°C, the degree of vacuum is ~100 P.
Light Microscope Axio Imager 2 (Zeiss)
The microscope works in the reflected and transmitted polarized light, epi-CDIC mode is available. The microscope is equipped with 5 Megapixel Color Camera AxioCam ICc 5.
Contact Angle Measuring and Contour Analysis System OCA 15EC (Dataphysics)
The instrument for contact angle measuring and drop shape analysis is equipped with a single direct dosing system SD-DM and a video measuring system.
GIX Microplotter Desktop (SonoPlot)
Microplotter has a 3D positioner with precision down to 20 µm for applying fluids on surfaces (droplets, lines, arcs). It is equipped with a piezoelectric dispenser (deposition volume >1.8 pl, viscosity <450 cP). The feature size is 30-200 um. A digital video capture camera visualizes the plotting process.
Integrating Sphere (Newport)
The sphere is used to collect luminescence and to measure the photoluminescence quantum yield of various solid samples. Photoluminescence is excited by a blue laser (405 nm).
Nano-Raman-spectrometer
The equipment combines a Raman microscope InVia (Renishaw) with a scanning probe microscope Integra-Spectra (NT-MDT). Three lasers for Raman excitation are available: 488, 633, and 780 nm. The system is also used for confocal photoluminescence microscopy with a 405-nm excitation. The sample temperature can be controlled by Linkam THMS600/720 (-196 – 300 °С). The scanning probe microscope supports the following modes: AFM, electron tunnelling, fork, Kelvin probe, TERS, etc.
Glovebox for Devices "Dry Box"
The glovebox is equipped by a gas purification system for water and oxygen (1 ppm). A solar simulator АМ1.5G (150 W, Newport 96000) installed nearby is used for study of organic solar cells in the glovebox. A stage for organic solar cell characterization is installed inside the glovebox. For electric characterization of solar cells a source-meter unit Keithley 2636A is used.
ProbeStation 100 (Printeltech)
Probestation 100 (Printeltech) is installed in the glovebox. The probe station is used for OFET characterization by using a source-meter unit (Keithley 2636A).
- up to 4 semi-automated probes
- fully automated sample holder
- multiple-sample loading for continuous testing
- digital microscope with LED lighting
- external LCD for probe positioning
- connected Keithley 26xx compatible
- installed into the glovebox
- 2D sample positioning with joystick
- software for measurement and processing
- OFET parameter extraction (mobility, threshold voltage, etc.)
Spectrometer for electroluminescence studies
The spectrometer is connected via an optical fiber to the probe station located in the glove box; it enables measuring electroluminescence spectra of organic light-emitting transistors in an inert atmosphere. The spectrometer contains a highly sensitive CCD camera (TRIUS PRO-694 CCD Camera, Strarlight Xpress). The spectrometer parameters: optical scheme – vertical Ebert scheme, relative aperture d/f=1/5, spectral range from 350 to 870 nm and resolution up to 1 nm.
Glovebox for Film Preparation from Solutions, "Wet Box"
The wet glovebox is equipped by gas purification system for water, oxygen, and organics. A spin coater TC100 AG (MTI) is installed in the glovebox.
Glovebox for vacuum deposition of thin films
The glovebox is equipped by gas purification system for water and oxygen (~1 ppm).
Evaporator Univex 300 (Leybold)
It is used for thin film deposition by thermoresistive technique. The evaporator is integrated in the glovebox.
Gas Purification System
Automatic systems for inert gas cleaning and pumping work with the three-glovebox and provides oxygen and water contamination at a level of ~1 ppm.
Spin-coater G3 (Spin Coating Systems)
Almost all the above equipment was installed in the framework of the M.V.Lomonosov Moscow State University Program of Development.