Optimized annealing regime of CuGaSe₂nanoparticles prepared by solvothermal method

Abstract

The single phase CGS nanoparticles were synthesized by solvothermal method. The optimal annealing regime of synthesis stage was determined as 180 °C for 12 h followed by an extra annealing at 230 °C for 12 h. The phase improvements were studied using X‐ray diffraction (XRD) patterns. Grain size ranging from 20–50 nm was obtained by SEM and TEM images and confirmed by Scherrer's formula. Band gap of 2.48 eV and a broad PL spectrum peaking at 3.16 eV were resulted respectively from studies on UV‐Visible absorption and photoluminescence (PL) patterns of the synthesized nanoparticles.

2D hexagonal CuGaSe2 nanosheets by a microwave assisted synthesis method: photoresponse and optical study for optoelectronic applications

“…[7][8][9] The synthesis approach of nanomaterials always plays an important role in tuning their electronic and optical characteristics. Various synthesis approaches have been adopted for the synthesis of CGS semiconductor nanoparticles, such as the hydro/solvothermal method, 5,10 colloidal synthesis, 11 hot injection method, 12 microwave synthesis, 13 etc. Recently, a lot of attention has been focused on the synthesis and properties of CGS nanoparticles (NPs).…”

“…4 These complexes are important semiconductors as light-absorbing layers in solar cells due to their high absorption coefficient, good photostability, and low-cost production. 5 CGS is an attractive material for the top cell in tandem photovoltaic systems because of its wide bandgap (1.7 eV). 6 Apart from photovoltaic applications, this material is also promising for photocathode and thermoelectric applications.…”