Available materials:
Organic materials – standard n– and p-type small-molecule organic semiconductors (e.g. pentacene, fullerene, phthalocyanines, etc) as well as polymer organic semiconductors (e.g. P3HT, MEH-PPV). Conductive polymer PEDOT:PSS is applicable for thin, transparent, flexible and conductive layers (100 Ω/sq for 50 nm thick film).
Nanoparticles (NPs) – dielectric (high-k), semiconducting, or metal (plasmonic) NPs can be applied. We have experience with NP surface modification and depositions. Preparation of plasmonic NP monolayers from colloids as well as by vacuum methods with controlled optical properties also possible.
Substrates – Si wafers, sapphire, glass, or flexible plastic substrates.
Encapsulation – besides standard inorganic encapsulation methods we can provide flexible, transparent barrier coating based on parylene C.
Technologies:
Vacuum evaporation systems – for deposition of organic and inorganic materials in high vacuum through shadow masks. The deposition system (SPECTROS 100) comprising the in situ simultaneous evaporation of 8 organic materials and metals from 3 different sources is available. The system is connected with glove-box assembly suitable for fabrication of sensitive devices as well as measurement in a nitrogen atmosphere.
Wet deposition techniques – besides standard dip-coating or spin-coating the lab is also equipped the rare spin-coating system with the chuck heated up to 250°C, which enables deposition of low-soluble materials or high crystallinity layer. The organic inkjet printer (Dimatix) is also available for deposition by printing.
Patterning – Carl Suss aligner with 0.4μm resolution (deep UV) with both sides aligning and nanoimprint lithography module.
Characterisation methods:
Electrical – All standard methods such as I-V, C-V, impedance spectra, DLTS, or noise analysis
Optical – Electroluminescence, solar simulator for solar cells, microRaman, various modes of SEM.
Analytical – AFM, STM, SEM.
Theory, Modelling and Simulation:
Optical properties – Simulation of light transmission or scattering for thin films, nanostructured surfaces, plasmonics, LEDs (far-fields), photonic structures and waveguides.
Electrical properties – Analysis of charge transport, contact resistance, and defects (deep levels) in organic devices.