Structure distortion-driven optical properties and temperature thermometry in one-dimensional hybrid lead halides

Area of Science:

• Materials Science
• Solid-State Chemistry
• Optoelectronics

Background:

• Low-dimensional organic-inorganic hybrid lead halides are promising materials for optoelectronic applications.
• Understanding the relationship between their structure and optical properties is crucial for material design.

Purpose of the Study:

• To synthesize one-dimensional organic-inorganic hybrid lead halides.
• To investigate the correlation between structural distortion and optical properties, including second harmonic generation (SHG) and thermometric sensitivity.

Main Methods:

• Solution synthesis of (C7H18N)PbX3 and (C13H26N)PbX3 (X = Br, I).
• Structural analysis of face-sharing PbX6 octahedral chains.
• Optical property characterization including temperature-dependent photoluminescence and second harmonic generation (SHG) measurements.

Main Results:

• Synthesized compounds exhibit one-dimensional structures with modulated distortion.
• Iodide compounds show non-centrosymmetric structures and strong SHG responses.
• Increased octahedral distortion correlates with enhanced SHG intensity.
• (C13H26N)PbI3 demonstrates high thermometric sensitivity (9.1% K-1 at 200 K).

Conclusions:

• Established a clear structure-property relationship in low-dimensional hybrid halides.
• Structural distortion is key to tuning nonlinear optical responses and thermometric sensitivity.
• These findings guide the development of advanced hybrid halide materials for optoelectronics.