Theoretical analysis of electronic, optical, photovoltaic and thermoelectric properties of AgBiS2

Design of Ag Injection in Bi2S3 (AgBiS2) Thin Films for Photoelectrochemical Cell and Solar Cell Applications

“…AgBiS 2 photodetector has exhibited broadband response with decent detectivity, and fast response of 700 ns reported by L. Jiang et al, (2020) [14]. S. Suzuki et al, (2020) [15], L. Mehdaoui et al, (2019) [16], Y. Wu et al [17] and J. V. Embden et al, (2019) [3] have reported the optical absorption coe cient above 10 5 cm -1 for this material. M. Z.…”

AgBiS2 as a photoabsorber for eco-friendly solar cells: a review

“…3a). Even though studies indicate the bulk AgBiS 2 in the matildite state to be the favourable candidate for photovoltaic applications 2 (because of its semiconducting nature) over the metallic schapbachite, we can see only the schapbachite phase being explored for photovoltaics so far. However, the cubic schapbachite phase entirely exhibits a semiconducting nature when the size of the material reduces to nanocrystal size.…”

“…The promising open circuit voltage of ∼1 V with a current density of 22 mA cm −2 points towards less non-radiative electron hole recombination losses occurring on these NCs, thus contributing to a theoretical PCE of up to 20% (ref. 2) (Fig. 3a).…”

“…AgBiS 2 ternary chalcogenides are found to be in hexagonal and cubic phases with indirect and direct bandgaps of (1.07 eV (ref. 2) and 0.8 eV (ref. 16)), respectively.…”

“…The state of Ag has a predominant role in determining the phase and structure as the presence of silver in Bi–S–Bi controls the DOS near E F (Fermi energy). 2 Ag atoms in the schapbachite structure trouble the hybridised Bi and S-p bands, which reduces the electronic state from Bi and S-p in the bandgap region and this shifts the electronic state to a lower energy and the material exhibits metallic behaviour. The cationic disorder of these materials influences the physicochemical properties, particularly the bandgap, going from low temperature (hexagonal phase) to high temperature (metallic cubic phase).…”