Material Characterization

Perovskite photovoltaic characterization

Most conventional solar cells are made from a layer of silicon sandwiched between two electrodes. Silicon solar cells have a great lifetime and are very stable, but they also have their limitations. One limitation is that they are unable to absorb energy from all wavelengths in the solar spectrum. However, perovskites are promising solar cell candidates. Read more

NV centers in diamond

The nitrogen-vacancy center (N-V center) is one of numerous point defects in diamond. Its most explored and useful property is photoluminescence, which can be easily detected from an individual N-V center, especially those in the negative charge state (N-V−). Read more

Nano particles and quantum dots

Characterization of nanoparticles - particles between 1 and 100 nanometers in size. We are often linked to localization of light in nanosized particles or interfaces that typically show a huge field enhancement at their surfaces. Typical examples are tiny single photonic components such as complex nano-waveguides, nano-apertures and nano-resonators. Tight localization is of great practical importance, e.g. for high resolution inspection, local modification of materials, high field concentration, intensity enhancement, increase of efficiency of nonlinear processes such as Raman scattering and harmonic generation Read more

Graphene and carbon nanotubes

Graphene is the first two-dimensional (2D) atomic crystal available. It is the strongest and lightest material we know, yet exceptionally flexible. It possesses other unique material properties such as extreme mechanical stiffness, high elasticity, and superior electrical and thermal conductivity. Researchers use supercontinuum lasers to map and characterize graphene and carbon nanotubes. Read more