Electrical Properties

Acentric magnetic and optical properties of chalcopyrite (CuFeS2)

“…Therefore, a magnetic moment on the copper site and, in particular, ordering of the copper magnetic moments as an origin of the low-temperature phase transition is ruled out. In addition, we do not find observable intensities in resonant soft x-ray Bragg diffraction at Fe L-edges for the reflections (0, 0, 1 2 ) and (0, 0, 1). Bragg diffraction of x-rays enhanced by an atomic resonance has the potential to provide information on ground-state electronic properties that cannot be obtained by any other experimental technique in the science of materials; for reviews of early studies of non-magnetic materials see, for example, [6,7].…”

“…Between 10 and 65 K the copper ion remains monovalent (3d 10 ) and, in consequence, there is no associated magnetic moment. In addition, the diffraction intensity enhanced by the iron L 3 resonance at 710 eV shows no evidence of (0, 0, 1 2 ) and (0, 0, 1) Bragg reflections, which if present would overrule a magnetic motif indexed on the chemical structure, I 42d (#122) [2,4]. These new experimental findings boost confidence in our adopted magnetic motif, confidence which is necessary in order to achieve worthwhile predictions due to a lack of consensus in published findings.…”

“…The mineral chalcopyrite is our most important source of copper, and its structure is the parent structure-type for a family of compounds that exhibit several useful electrical and optical properties-photovoltaic conversion, luminescence, and piezoelectricity (for extensive bibliographies see, for example, [1,2]). Despite extensive investigations, there is no consensus view about the electrical and magnetic properties of chalcopyrite.…”

Crystal structure of the ternary semiconductor Cu2In14/3□4/3Se8determined by X-ray powder diffraction data

“…The compounds with ternary structures of the chalcopyrite family I-III-VI 2 form an extensive group of semiconductor materials with diverse optical and electrical properties (Shay and Wernik, 1974). From the structural point of view, they crystallize with tetragonal symmetry in the space group I 2 d (No 122) being isostructural with the CuFeS 2 mineral (chalcopyrite) from which they take their name (Pauling and Brockway, 1932).…”

Deep level transient spectroscopy and photoluminescence studies of hole and electron traps in ZnSnP2 bulk crystals

“…Z nSnP 2 (ZTP) has recently attracted much attention as a photo-absorber of thin-film solar cells because of the non-toxic constituents, the suitable bandgap (1.67 eV), and the high absorption coefficient of about 10 5 cm −1 in the visible light region. 1,2) Nakatsuka et al first demonstrated solar cells using ZTP bulk crystals with the device structure of Al-doped ZnO/CdS/ZTP/Mo referring to the typical structure of CuInSe 2 -based solar cells, and reported the conversion efficiency of 0.087%. 3) They also discussed the high series resistance of 100 Ω cm 2 in the above device and proposed the usage of Cu as a back electrode in order to reduce the resistance in the subsequent work.…”