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P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Defect Driven Opto-Critical Phases Tuned for All-Solar Utilization.

Melbert Jeem¹, Ayaka Hayano², Hiroto Miyashita²

¹Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan.

Advanced Materials (Deerfield Beach, Fla.)

|July 29, 2023

Summary

A novel submerged photo-synthesis of crystallites (SPsC) method enables oxide materials to harness the full solar spectrum. This breakthrough facilitates enhanced photothermal, water evaporation, and photo-electrochemical applications for sustainable energy.

Keywords:

photo-electrochemical photothermal solar utilization solar water evaporation submerged photo-synthesis

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Area of Science:

Materials Science
Nanotechnology
Sustainable Energy

Background:

Photo-responsive nanoparticles are crucial for energy and photonic applications.
Current methods for creating these materials have limitations in capturing the entire solar spectrum.

Purpose of the Study:

To introduce an innovative submerged photo-synthesis of crystallites (SPsC) method.
To develop oxide materials with a whole solar wavelength response for enhanced energy applications.

Main Methods:

Utilized submerged photo-synthesis of crystallites (SPsC) for material synthesis.
Introduced strategic doping with copper and oxygen vacancies in nonstoichiometric tungstic acids (WO3·H2O).
Investigated the induction of opto-critical phases and their effect on lattice defect stabilization.

Main Results:

Achieved a whole solar wavelength response in the synthesized materials.
Demonstrated photothermal, photo-assisted water evaporation, and photo-electrochemical properties.
The SPsC strategy enabled dynamic equilibrium shifts in lattice defect stabilization.

Conclusions:

The one-pot SPsC strategy offers a new pathway for designing advanced oxide materials.
This approach enhances material functionality for diverse applications by harnessing all-solar energy.
The developed materials show significant potential in sustainable energy and photonic technologies.