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Photoelectric Effect

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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Unprecedented Silver-Based Hybrid Pyroelectric Enabling Wide Spectral Photo-Pyroelectricity for Birefringence

Xi Zeng^1,2, Fu Li³, Yi Liu¹

¹State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou, Fujian, China.

Angewandte Chemie (International Ed. in English)

|September 9, 2024

Summary

Researchers developed a novel silver-based hybrid pyroelectric material, (N-CHM)Ag2I3, enabling light-controlled birefringence modulation. This breakthrough offers a new strategy for advanced optical and optoelectronic devices.

Keywords:

birefringence lead-free hybrid photo-pyroelectricity pyroelectric

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Area of Science:

Materials Science
Optoelectronics
Crystallography

Background:

Birefringent crystals are crucial for manipulating polarized light in optics and optoelectronics.
Controlling birefringence modulation remains a significant challenge in the field.

Purpose of the Study:

To introduce a novel silver-based hybrid pyroelectric material, (N-CHM)Ag2I3, for light-induced birefringence modulation.
To investigate the photo-pyroelectric effect and its application in regulating birefringence.

Main Methods:

Synthesis and characterization of the silver-based hybrid pyroelectric material (N-CHM)Ag2I3.
Measurement of photo-pyroelectric properties, including polarization and voltage responsivity across UV-NIR spectrum.
Evaluation of in-plane birefringence photomodulation through the pyroelectric effect.

Main Results:

The material (N-CHM)Ag2I3 exhibits strong room-temperature photo-pyroelectricity with high polarization (~3.23 μC/cm2) and voltage responsivity (~0.96 m2/C).
Demonstrated successful photomodulation of in-plane birefringence with a high saturation value (~1.68×10-2).
The material is lead-free, addressing environmental concerns in optoelectronics.

Conclusions:

The wide spectral photo-pyroelectric effect in (N-CHM)Ag2I3 provides a feasible strategy for light-controlled birefringence.
This lead-free material shows potential for developing next-generation smart optical and optoelectronic devices.