Phase equilibria in the HgS–Ga2S3–GeS2 system

Mercury Thiogermanate Glasses HgS-GeS2: Vibrational, Macroscopic, and Electric Properties

“…In mercury thiogermanate glasses, HgS-GeS 2 , independent evidence is given by DSC (Figure ). The DSC traces of the x = 0.5 and 0.6 samples exhibit a distinct endothermal effect at ∼394 °C, corresponding to a polymorphic transition in Hg 4 GeS 6 , Section . This ternary crystalline compound is also detected in (HgS) 0.6 (GeS 2 ) 0.4 glassy/crystalline alloy (Figure ).…”

“…In fact, the annealing of the obtained crystalline compound (HgS) 0.8 ( GeS 2 ) 0.2 at 723 °C leads to the single-phase, low-temperature monoclinic polymorph Hg 4 GeS 6 as shown in Figure b . Crystalline Hg 4 GeS 6 is the only incongruently melting compound in the HgS-GeS 2 quasi-binary system, which forms at 723 °C and has a polymorphic transformation at 426 °C. The structure of the low-temperature modification is monoclinic (space group Cc )…”

Obtaining and optical properties of the glasses of the GeS2–HgS system

“…To elucidate the rules that govern the changes in the Raman spectra with x, we turn to the stable phase diagram of the HgS-GeS 2 which is the most objective way to determine interrelationship compositionstructure-properties. According to the phase diagram, the glass-formation region in this system (0 < x < 0.52) corresponds to two liquidus sections, the crystallization of HT-GeS 2 and Hg 4 GeS 6 , separated by the eutectic at x = 0.42 [8].…”

Formation of nanometer-sized Cu-Sn-Se particles in Cu2ZnSnSe4 thin-films and their effect on solar cell efficiency

“…The growth of CZTS(e) films is often hampered by the formation of secondary phases due to the narrow existence regions of CZTS(e) compounds as confirmed by theoretical [5,6] and experimental studies [7,8]. Secondary phases that were observed are predominantly ZnS(e) [9e12], Cu x S(e) [13,14], Cu 2 SnS(e) 3 [15,16], and SnS(e) x [9,14].…”