Cu₂ZnSnS₄, Cu₂ZnSnSe₄ Nanocrystals As Absorbers In 3rd Generation Solar Cells

Abstract

Cu2ZnSnS4 and Cu2ZnSnSe4 semiconductor nanocrystals were synthesized by polyol method. The morphological and structural properties were investigated by transmission electron microscopy and X-ray diffraction methods. The nanocrystals growth behavior for both compounds were compared. Showed that the synthesized nanocrystals of the four-component compounds have a single phase structure of tetragonal modification of the kesterite type. It has been found that secondary phases are not detected in the materials with the method precision. It is established that the lattice period closest to the bulk materials of stoichiometric composition has CZTS nanocrystals synthesized at a time of 60 min and CZTSe particles obtained at a synthesis time of 30-45 min. The obtained nanocrystals were used to develop nanoinks to print absorbers of solar cells by 2d and 3d printers.

Effect of Different Selenium Precursors on Structural Characteristics and Chemical Composition of Cu2ZnSnSe4 Nanocrystals

“…Then, a mixture of salts CuCl 2 ⋅2H 2 O, Zn(CH 3 COO) 2 ⋅2H 2 O, SnCl 2 ⋅2H 2 O in the different molar ratios Cu : Zn was added to the resulting solution and stirred with magnetic stirrer heated to 65°C for 1 h. The synthesis of the NCs at the temperature of the reaction medium was carried out separately with the exposure interval of τ = 0, 15, 30, 60 min. The synthesis procedure more detail described in [57].…”

“…The methodology for studying the structural, microstructural, chemical properties of the nanoparticulate products is described in detail in our previous works [57,59,[66][67][68].…”

“…Previously, we optimized the conditions to synthesize Cu 2 ZnSnS 4 and ZnO NCs using the polyol method [56][57][58][59][60]. As a result, we obtained single-phase nanocrystals of the kesterite (CZTS) and wurtzite (ZnO) phases with a controlled sizes.…”