Jakub Zdziebłowski
supervisor: Paweł Zabierowski
Cadmium indium sulfide (CdIn2S4) aroused interest among researchers when its contribution to performance improvement in CIGS solar cells was discovered. Various studies have shown inherence of persistent photoconductivity due to the presence of the metastable defect states in this material. The possibility of controlling metastability by defect engineering and resulting switching phenomena makes CdIn2S4 a very promising candidate for base material for neuromorphic devices.
Study focuses on spectral response photoconductance measurement of CdIn2S4 thin-films at various temperatures and pre-illumination. Hence, basic information about band structure was obtained.
Conducted experiments show significant growth of conductivity, dependent on pre-illumination, using incident photons with both sub-bandgap and above bandgap energy. Obtained data will throw light on the matter of CdIn2S4 metastability. Presented work is one of the first results of broad research covering many aspects and applications of the studied material.