On solvated tin(iv) ions and the coordination chemistry of high-valent d¹⁰ metal ions

Abstract

The first methyltin(iv) solvate, formed through slow oxidation in organic medium (dmso), has been structurally determined in solution and solid state.

Relationship between Carrier Density and Precursor Solution Stirring for Lead-Free Tin Halide Perovskite Solar Cells Performance

“…It can be seen that the charge carrier density increased without or with GeI 2 doping under the influence of DMSO solvent, which was explained earlier. 24,25 Without GeI 2 doping, the charge carrier density increased from an initial 2.59 × 10 15 cm −3 (1 h) to 1.31 × 10 17 cm −3 (24 h). In contrast, GeI 2 doping of the perovskite suppressed the increase in charge carrier density from 4.33 × 10 14 cm −3 (1 h) to 1.51 × 10 15 cm −3 (24 h).…”

“…The key factor for the increase in the carrier concentration is related to the unwanted oxidation of Sn in the perovskite solution. It is assumed that the sulfoxide group of DMSO solvent is reduced to increase the charge carrier concentration . In addition, GeI 2 plays a dual role in the tin precursor ink.…”

“…It is assumed that the sulfoxide group of DMSO solvent is reduced to increase the charge carrier concentration. 24 In addition, GeI 2 plays a dual role in the tin precursor ink. First, the initial background charge density was minimal with GeI 2 doping at the beginning of the 1-h aging.…”