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Updated: Jan 21, 2026
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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
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Lead-Free Double Perovskite Cs2 SnX6 : Facile Solution Synthesis and Excellent Stability
Xiao Han1,2,3, Jia Liang2,4, Ji-Hui Yang5
1School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 3, 2019
Summary
Researchers developed a stable, lead-free double perovskite, Cs2SnX6, using a simple solution method. This material shows excellent stability and potential for applications like photodetectors, addressing key limitations of traditional perovskites.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Physics
Background:
- Organic-inorganic lead halide perovskites face challenges with long-term instability and lead toxicity.
- Widespread application of perovskite materials is hindered by these significant drawbacks.
Purpose of the Study:
- To develop a stable, lead-free alternative to traditional lead halide perovskites.
- To synthesize and characterize novel lead-free double perovskites with enhanced stability and performance.
Main Methods:
- Facile and efficient solution-phase synthesis of lead-free Cs2SnX6 (X = Br, I).
- Systematic experimental characterization of structural, chemical, and stability properties.
- First-principle simulations to understand stability mechanisms.
Main Results:
- Successfully synthesized lead-free Cs2SnX6 with well-defined crystal structure and high yield.
- Demonstrated excellent long-term stability against moisture, light, and high temperature.
- Fabricated high-performance and stable photodetectors based on Cs2SnI6.
Conclusions:
- The unique vacancy-ordered defect-variant structure, stable Sn4+ composition, and lower formation enthalpy contribute to Cs2SnX6 stability.
- Cs2SnX6 presents a promising lead-free alternative for stable optoelectronic applications.
- This research offers valuable insights for designing stable lead-free double perovskites.
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