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Related Concept Videos

Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Related Experiment Video

Updated: Jun 30, 2026

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

Molecular Chelating-Clamp Strategy Using Dithiol Antidotes Enables Efficient and Stable Inorganic Perovskite Solar

Xianghan Feng1, Junqi Zhang1, Zhiteng Wang1

  • 1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 29, 2026
PubMed
Summary
This summary is machine-generated.

Sodium 2,3-dimercapto-1-propanesulfonate (DPS) enhances all-inorganic perovskite solar cells by simultaneously reducing defects and ion migration. This leads to improved efficiency and stability in perovskite photovoltaics.

Keywords:
chelationdefect passivationinorganic perovskite solar cellslewis acid‐base interactionsstabilizationsulfonated‐thiol molecule

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Key Factors Affecting the Performance of Sb2S3-sensitized Solar Cells During an Sb2S3 Deposition via SbCl3-thiourea Complex Solution-processing
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Key Factors Affecting the Performance of Sb2S3-sensitized Solar Cells During an Sb2S3 Deposition via SbCl3-thiourea Complex Solution-processing

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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

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Last Updated: Jun 30, 2026

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

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Published on: March 19, 2017

Key Factors Affecting the Performance of Sb2S3-sensitized Solar Cells During an Sb2S3 Deposition via SbCl3-thiourea Complex Solution-processing
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Key Factors Affecting the Performance of Sb2S3-sensitized Solar Cells During an Sb2S3 Deposition via SbCl3-thiourea Complex Solution-processing

Published on: July 16, 2018

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

Area of Science:

  • Materials Science
  • Photovoltaics
  • Chemistry

Background:

  • All-inorganic perovskites suffer from halide vacancy defects and ion migration, limiting performance and stability.
  • These issues stem from the material's soft lattice and mixed ionic-electronic properties.
  • Existing passivation methods often fail to address both problems concurrently.

Purpose of the Study:

  • To develop a multifunctional passivation agent for all-inorganic perovskites.
  • To simultaneously mitigate halide vacancy defects and ion migration.
  • To enhance the photovoltaic performance and operational stability of CsPbI$_{3-x}$Br$_{x}$ solar cells.

Main Methods:

  • Introduction of sodium 2,3-dimercapto-1-propanesulfonate (DPS), a sulfonated thiol molecule, as a multifunctional chelating clamp.
  • Utilizing DPS's bidentate chelation strategy with two thiol groups binding to Pb$^{2+}$ sites.
  • Leveraging DPS's flexible linker and sulfonate group for adaptability and targeted defect site binding.
  • Investigating DPS's effect on film crystallization kinetics during annealing.

Main Results:

  • DPS effectively passivates undercoordinated Pb$^{2+}$ sites, forming stable five-membered rings.
  • DPS promotes larger grain sizes, reduced strain, and enhanced film homogeneity by retarding crystallization.
  • Perovskite films treated with DPS exhibit lower trap density and prolonged carrier lifetimes.
  • Solar cells incorporating DPS achieved a champion power conversion efficiency of 22.28% with improved stability.

Conclusions:

  • DPS acts as a versatile molecular clamp, addressing critical defects and ion migration in all-inorganic perovskites.
  • Tailored molecular design with DPS significantly enhances both the efficiency and stability of perovskite solar cells.
  • The strategy demonstrates a promising pathway for developing efficient and stable perovskite photovoltaics with simplified processing.