Vacancy-Ordered Quadruple Halide Perovskites: Synthesized Noble-Metal Semiconductors

A unique family of inorganic halide perovskites based on noble metals was successfully synthesized using a 'stick & square' approach. The dataset, authored by Alaelddin Michailidis Barakat and last updated in April 2026, describes compounds with a general formula of A₄Au₂Pd□X₁₂ (A = Cs, Rb; X = Cl, Br, I). All compounds are black in color with sharp absorption edges in the near-infrared range and an experimentally determined bandgap in the 0.8–1.55 eV range.

Use Cases

• Training models to predict bandgap properties based on halide ion composition and structure.
• Analyzing the relationship between crystal symmetry, morphology, and optical absorption characteristics.
• Benchmarking density functional theory (DFT) calculations against experimental XPS and synthesis data.

Strengths

• Describes a unique, synthesized family of compounds with a specific general formula (A₄Au₂Pd□X₁₂).
• Provides experimentally determined bandgap values in the 0.8–1.55 eV range.
• Includes validation via X-ray photoelectron spectroscopy (XPS) and DFT calculations.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The dataset is extremely small (640.0 B), indicating limited scope, likely a summary document.

Provenance

Source

figshare, authored by Alaelddin Michailidis Barakat.

Collection Method

Synthesized compounds using a 'stick & square' approach; characterized via XPS and DFT.

Time Range

Publication date implied as 2026.

Freshness

Last updated 2026-04-27 17:35:28; freshness should be verified.

Geography

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