Exploring the heteroanionic 2D materials RhSeCl and RhTeCl as promising semiconductor materials

Area of Science:

• Materials Science
• Solid State Physics
• Photocatalysis

Background:

• Heteroanionic materials are emerging as promising 2D semiconductors.
• Tunable band gaps make them suitable for photocatalytic water splitting.
• Understanding structure-property relationships is crucial for material design.

Purpose of the Study:

• To investigate the impact of anion variation on the crystal structure and properties of selected heteroanionic materials.
• To evaluate their potential for photocatalytic water splitting applications.
• To confirm their semiconductor nature and band gap characteristics.

Main Methods:

• Crystal synthesis via chemical vapor transport.
• Structural analysis using powder X-ray diffraction and convergent beam electron diffraction.
• Thermochemical studies for decomposition point analysis.
• Spectroscopic characterization including electron energy loss spectroscopy and photoluminescence.

Main Results:

• Elucidation of non-centrosymmetric space groups for the synthesized compounds.
• Demonstration of crystal structure influence on compound decomposition points.
• Confirmation of indirect bandgap semiconductor nature for both materials.
• Validation of theoretical predictions through experimental spectroscopic data.

Conclusions:

• Anion variation significantly influences the structural and thermochemical properties of heteroanionic materials.
• These materials exhibit indirect bandgap semiconductor characteristics, suitable for photocatalysis.
• Further research into heteroanionic compounds could advance 2D semiconductor technology for water splitting.