Bulk recrystallization for efficient mixed-cation mixed-halide perovskite solar cells

Today, the use of mixed-cation lead mixed-halide perovskite with a slight excess of lead iodide (PbI 2 ) demonstrates the highest device performances in the literature. However, the presence of excess PbI 2 in the film poses long-term stability concerns. Here, we propose a facile bulk recrystallizat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (44), p.25511-2552
Main Authors: Lin, Liangyou, Wang, Jacob Tse-Wei, Jones, Timothy W, Grigore, Mihaela, Cook, Andre, deQuilettes, Dane W, Brenes, Roberto, Duck, Benjamin C, Anderson, Kenrick F, Duffy, Noel W, Wenger, Bernard, Bulovi, Vladimir, Pu, Jian, Li, Jian, Chi, Bo, Snaith, Henry J, Wilson, Gregory J
Format: Article
Language:English
Subjects:
Cations
Crystal structure
Depth profiling
Energy conversion efficiency
Interface stability
Iodides
Lead
Maximum power
Optoelectronic devices
Perovskites
Photovoltaic cells
Recombination
Recrystallization
Solar cells
Structure-function relationships
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Today, the use of mixed-cation lead mixed-halide perovskite with a slight excess of lead iodide (PbI 2 ) demonstrates the highest device performances in the literature. However, the presence of excess PbI 2 in the film poses long-term stability concerns. Here, we propose a facile bulk recrystallization process by applying formadinium chloride (FACl) on perovskite to remove excess PbI 2 in the formed crystal. We are able to demonstrate bulk recrystallization, proved and observed by the Grazing incidence XRD to analyze the crystal structure as a function of depth profiling. The reconstructed crystal displays improved optoelectronic qualities with reduced interfacial recombination as well as enhanced device stability. When measured under AM 1.5G spectral conditions the optimized champion device reached a maximum power conversion efficiency (PCE) of 20.2%. A facile bulk recrystallization process remove excess PbI 2 and improved the performance in perovskite solar cells.
ISSN:2050-7488
2050-7496
DOI:10.1039/c9ta08351k