An extended Tolerance Factor approach for organic-inorganic perovskites.

An extended Tolerance Factor approach for organic–inorganic perovskites† †Electronic supplementary information (ESI) available: SI-Table 1, shows all 2352 calculated Tolerance Factors. SI-Fig. 1–6, show plots similar to Fig. 1 for fluoride, chloride, bromide, cyanide, borohydride and azide based permutations. See DOI: 10.1039/c5sc00961h Click here for additional data file.

On the application of the tolerance factor to inorganic and hybrid halide perovskites: a revised system

The tolerance factor is a widely used predictor of perovskite stability. The recent interest in hybrid perovskites for use as solar cell absorbers has lead to application of the tolerance factor to these materials as a way to explain and predict structure. Here we critically assess the suitability of the tolerance factor for halide perovskites. We show that the tolerance factor fails to accurat...

Decreasing the electronic confinement in layered perovskites through intercalation.

We show that post-synthetic small-molecule intercalation can significantly reduce the electronic confinement of 2D hybrid perovskites. Using a combined experimental and theoretical approach, we explain structural, optical, and electronic effects of intercalating highly polarizable molecules in layered perovskites designed to stabilize the intercalants. Polarizable molecules in the organic layer...

Post-synthetic halide conversion and selective halogen capture in hybrid perovskites.

Reaction with halogen vapor allows us to post-synthetically exchange halides in both three- (3D) and two-dimensional (2D) organic-inorganic metal-halide perovskites. Films of 3D Pb-I perovskites cleanly convert to films of Pb-Br or Pb-Cl perovskites upon exposure to Br2 or Cl2 gas, respectively. This gas-solid reaction provides a simple method to produce the high-quality Pb-Br or Pb-Cl perovski...

Between the Sheets: Postsynthetic Transformations in Hybrid Perovskites

Hybrid perovskites combine the optical and electronic versatility of ionic inorganic solids with the synthetic diversity and tunability of covalent organic molecules. Their multicomponent, crystalline architectures, incorporating a wide array of metals, ligands, and organic molecules, can be synthetically fine-tuned to accommodate diverse target technologies. In this Perspective, we highlight h...