Structure–property relations in Ag–Bi–I compounds: potential Pb-free absorbers in solar cells

Abstract

Structure-property relations of Ag2-3xBixI2 have been revealed.

Parallel Evaluation of the BiI3, BiOI, and Ag3BiI6 Layered Photoabsorbers

“…The occurrence of the rhomboedral R3m and cubic F d3m crystal structures of ABI as a function of composition x has been the subject of some debate. 9,10,17,30,36,41 The only possible stoichiometry in either structure that is compatible with both charge neutrality and with the absence of vacancies and interstitials is AgBiI 4 (x = 1). However, it was shown by two independent studies that, for x = 1, a mix of the two R3m and F d3m structures is obtained.…”

“…However, it was shown by two independent studies that, for x = 1, a mix of the two R3m and F d3m structures is obtained. 10,41 For x > 1, the R3m structure is favored and it appears as a single phase at compositions close to Ag 2 BiI 5 . For higher values of x, the R3m phase is present together with a AgI secondary phase.…”

From Pb to Bi: A Promising Family of Pb‐Free Optoelectronic Materials and Devices

“…d) Reproduced with permission. [149] Copyright 2019, The Royal Society of Chemistry. www.advancedsciencenews.com corner-sharing six-coordinated Ag and eight-coordinated Bi polyhedron.…”

Perovskite-Inspired Lead-Free Ag2BiI5 for Self-Powered NIR-Blind Visible Light Photodetection

“…Among perovskite-inspired solution-processed semiconductors, rudorffites have attracted increasing attention over the last few years particularly because of their three-dimensional structure and because they do not contain heavily toxic elements [14][15][16][17][18][19][20][21][22][23][24]. Their structure relies on metal-halide [MX 6 ] octahedra (where M is a monovalent or trivalent metal, e.g., Bi, Sb, Cu, Ag, and X is a halide) as the building blocks of a three-dimensional lattice featuring an edgesharing packing motif [17][18][19].…”