Ba₃HgGa₂S₇: A Zero-Dimensional Quaternary Sulfide Featuring a Unique [Hg₂Ga₄S₁₄]^12– String and Exhibiting a High Photocurrent Response

Abstract

The discovery of new types of metal sulfides is attractive because of their rich structures and diverse physical properties. Here, a novel quaternary sulfide, Ba3HgGa2S7 (BHGS), is obtained by a solid-state reaction at 1123 K. It crystallizes in the monoclinic space group P21/c, and its zero-dimensional structure features two seesaw-like HgS2 units and four GaS4 tetrahedra, constructing a unique [Hg2Ga4S14]12– string. BHGS has a wide band gap of 3.64 eV and a large birefringence of 0.09 at 2100 nm. Specifically, BHGS exhibits a remarkable photocurrent response. This work may be extended to a new family of AE3MIIMIII 2Q7 (AE = Mg, Ca, Sr, Ba; MII = Zn, Cd, Hg; MIII = Al, Ga, In; Q = S, Se) chalcogenides.

Pb2BiS2I3 Nanowires for Use in Photodetectors

“…Multicomponent chalcogenide halide compounds may be suitable as novel photoelectric materials that provide good efficiency and stability. − Unique structures could be formed because atoms compete to form stable sites in the crystal owing to the different t bonding preferences of the halide atoms and chalcogenide . Seok et al fabricated solar cells based on SbSI; these cells showed a 3.05% power conversion efficiency (PCE) under standard 100 mW/cm 2 irradiation conditions .…”

Revisiting two thiophosphate compounds constituting d0transition metal HfP2S6and d10transition metal α-Ag4P2S6as multifunctional materials for combining second harmonic generation response and photocurrent response

“…The photocurrent density of α-Ag 4 P 2 S 6 and β-Ag 4 P 2 S 6 is 165 nA cm −2 and 135 nA cm −2 , respectively. A comparison of photocurrent response among α-Ag 4 P 2 S 6 , β-Ag 4 P 2 S 6 and many previously reported sulfides is summarized in Table S2 † 51,114–124 . α-Ag 4 P 2 S 6 and β-Ag 4 P 2 S 6 show better photocurrent response than many sulfides such as BaCuSbS 3 (55 nA cm −2 ), 121 Cs 2 Ag 2 Zn 2 S 4 (50 nA cm −2 ), 122 Rb 2 Ba 3 Cu 2 Sb 2 S 10 (6 nA cm −2 ), 123 and TlHgInS 3 (0.35 nA cm −2 ).…”

“…A comparison of photocurrent response among α-Ag 4 P 2 S 6 , β-Ag 4 P 2 S 6 and many previously reported sulfides is summarized in TableS2. †51,[114][115][116][117][118][119][120][121][122][123][124] α-Ag 4 P 2 S 6 and β-Ag 4 P 2 S 6…”

{[In2S7]8–}∞ Chain and Isolated HgS4 Planar Unit Constructed One-Dimensional Pentanary Sulfide K2Ba7HgIn4S16 Exhibiting Nonlinear-Optical Activity

“…So, “Ba 8 HgIn 4 S 16 ” may be derived from K 2 Ba 7 HgIn 4 S 16 in the future. Previously, we reported that Ba 3 HgGa 2 S 7 crystallizes with a new structure type, the zero-dimensional structure of which features two seesaw-like HgS 2 units and four GaS 4 tetrahedra that constructed a unique [Hg 2 Ga 4 S 14 ] 12– string (Figure ). In K 2 Ba 7 HgIn 4 S 16 , this planar HgS 4 unit appears for the first time in the known Hg-containing chalcogenides with noncentrosymmetric (NCS) structure.…”

“…So, "Ba 8 HgIn 4 S 16 " may be derived from K 2 Ba 7 HgIn 4 S 16 in the future. Previously, we reported that Ba 3 HgGa 2 S 7 crystallizes with a new structure type,21 the zero-dimensional structure of which features two seesaw-like HgS 2 units and four GaS 4 tetrahedra that constructed a unique [Hg 2 Ga 4 S 14…”