Related Experiment Video
Updated: Apr 5, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
19.2K
A Closer Look into Two-Step Perovskite Conversion with X-ray Scattering.
Johannes Schlipf1, Pablo Docampo2, Christoph J Schaffer1
1†Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany.
The Journal of Physical Chemistry Letters
|August 12, 2015
Summary
Hybrid perovskite solar cells utilize a two-step method for crystal formation. This study reveals how crystal size in lead iodide films influences the final perovskite structure, aiding controlled film deposition.
Area of Science:
- Materials Science
- Renewable Energy
- Crystallography
Background:
- Hybrid perovskites are promising for efficient, cost-competitive solar cells.
- Challenges remain in understanding perovskite crystal formation and deposition techniques.
Purpose of the Study:
- To investigate the crystallization process in hybrid perovskite films using a two-step deposition method.
- To elucidate the relationship between precursor film morphology and final perovskite structure.
Main Methods:
- A two-step protocol involving a lead iodide (PbI2) precursor film converted to methylammonium lead triiodide-x chloride (MAPbI3-xClx) perovskite.
- Grazing incidence small-angle X-ray scattering (GISAXS) to analyze inner film morphology.
Main Results:
- A strong correlation was observed between lateral crystal sizes in the PbI2 precursor and the final MAPbI3-xClx perovskite films.
- Laterally confined crystal growth is proposed as the mechanism linking precursor and product crystal sizes.
- An accumulation of smaller grains was detected in the bulk of the film compared to the surface.
Conclusions:
- The study clarifies the crystallization mechanism in two-step deposited perovskite films.
- Understanding this process is vital for controlled film formation, enhanced reproducibility, and improved photovoltaic performance in perovskite solar cells.
