Manipulating solvent fluidic dynamics for large-area perovskite film-formation and white light-emitting diodes.

ABSTRACT: Presynthesized perovskite quantum dots are very promising for making films with different compositions, as they decouple crystallization and film-formation processes. However, fabricating large-area uniform films using perovskite quantum dots is still very challenging due to the complex fluidic dynamics of the solvents. Here, we report a robust film-formation approach using an environmental-friendly binary-solvent strategy. Nonbenzene solvents, n-octane and n-hexane, are mixed to manipulate the fluidic and evaporation dynamics of the perovskite quantum dot inks, resulting in balanced Marangoni flow, enhanced ink spreadability, and uniform solute-redistribution. We can therefore blade-coat large-area uniform perovskite films with different compositions using the same fabrication parameters.

SUBMITTER: Shi G 

PROVIDER: S-EPMC10844237 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature