Dilute Magnetic Semiconductor Cu₂FeSnS₄ Nanocrystals with a Novel Zincblende Structure

Abstract

Diluted magnetic semiconductor Cu 2 FeSnS 4 nanocrystals with a novel zincblende structure have been successfully synthesized by a hot-injection approach. Cu + , Fe 2+ , and Sn 4+ ions occupy the same position in the zincblende unit cell, and their occupancy possibilities are 1/2, 1/4, and 1/4, respectively. The nanocrystals were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy-dispersive spectroscopy (EDS), and UV-vis-NIR absorption spectroscopy. The nanocrystals have an average size of 7.5 nm and a band gap of 1.1 eV and show a weak ferromagnetic behavior at low temperature.

Investigation on the effect of cation substitution in Cu2ZnSn(S,Se)4 thin film solar cell

“…The stannite structure has better symmetry in the structure which lead to less cationic disorder in comparison with kesterite CZTS [168]. Many reports on CFTS thin films fabrication based on different methods such as solvothermal [158], hot injection method [169], molecular method [170], spray pyrolysis [171]. CFTS has potential to be photovoltaic absorber based on its band gap (1-1.5 eV) and high absorption coefficient (10 4 cm −1 ) in the visible spectrum range [18].…”