Orientational Order in Spin-Cast Lead-Iodide Perovskite Nanocrystal Solids
Nov. 16, 2023
By varying the additive ligand length, we explored the trade-offs between ordering and the formation of layered (2D) perovskite impurities.
Scientific Achievement
We showed that film processing and ligand choice can control the crystallographic orientation in lead-halide perovskite nanocrystal solids.
Significance and Impact
We established improved long-range order in lead halide nanocrystal solids leading to improved charge transport properties.
Research Details
- Control of the crystallographic orientation in lead-halide perovskite nanocrystal solids utilizes ligand choice and high-speed film processing
- In situ X-ray scattering shows that orientational ordering occurs rapidly upon solvent removal during spin coating.
- Assembly-directing ligands as additives to enhance orientational ordering showing intermediate-length octylamines demonstrate increased in-plane yield-mobility indicating enhanced internanocrystal electronic coupling concomitant with ordering.
