Research projects financed by Estonian Science Foundation (ETIS link)

Our team:

November 2021

Defect studies

Fundamental studies performed by the group leaded by Professor Jüri Krustok  were concentrated mainly on studies of chalcopyrite and kesterite solar cell absorber materials like CuInSe2, CuInS2, CdTe, Cu2ZnSnS4, Cu2ZnSnSe4. Photoluminescence, Raman spectroscopy, photoreflectance, admittance spectroscopy, XPS are the main tools for these studies. 

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Our optics laboratory

 

Raman spectrometer Horiba

XPS and UPS laboratory

Additionally we have high scientific competence in science and technology of different compound semiconductors, including Cu2ZnSnS4, SnS, Sb2Se3, CuInSe2, CuInS2, CuGaSe2, CdS, CdTe and other materials. The laboratory of the department is equipped to the European level: all main scientific and technological apparatus are not older than 4 years. Our activities are related to materials research and to solar cell design and research. Materials research is mainly related to defect studies in solar cell materials. We are using photoluminescence in these studies. Our optical system includes Raman spectrometer (Horiba Jobin Yvon LabRam HR800),closed-cycle He cryostat (T=8-320K), He-Cd and semiconductor lasers, computer controlled grating monochromator and several emission detectors. Our lab has also lot of technological equipment to build solar cells (electron beam evaporation system for metals, RF sputtering system for ZnO, chemical bath technology for buffer layers, high temperature furnaces) and equipment for chemical analysis, including EDX, FTIR.