Nanoscale Plasmonic Heating-Induced Spatiotemporal Crystallization of Methylammonium Lead Halide Perovskite.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41085454.
- Also identified by DOI 10.1021/acsnano.5c12057 and PMC identifier 12593378.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Precise spatiotemporal control over crystallization is essential for advancing optoelectronic materials, yet achieving this in lead halide perovskites remains challenging. Conventional methods rely on preseeded growth, suffer from redissolution, or require complex optical setups. Here, we demonstrate a seed-free, plasmonic heating-driven approach for nanolocalized, on-demand nucleation and growth of methylammonium lead bromide (MAPbBr<sub>3</sub>) perovskites using a continuous-wave (CW) laser. By leveraging localized surface plasmon resonance (LSPR) in gold nanoparticles (AuNPs), we induced supersaturation at the NP surface to initiate crystallization. Using high-speed microscopy, we captured subsequent critical events from nucleation to growth with submillisecond resolution. These insights challenge conventional crystallization models and establish a scalable, mask-free platform for engineering perovskite materials with tailored properties for next-generation optoelectronics.