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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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Updated: Jun 28, 2025

Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping

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Published on: July 2, 2012

Multifunctional photon conversion materials for enhancing silicon solar cells.

Yiyan Zhang¹, Guanying Chen²

¹MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 150001, Harbin, China.

Light, Science & Applications

|April 9, 2024

Summary

This summary is machine-generated.

New multifunctional phosphors utilizing erbium (Er³⁺) and ytterbium (Yb³⁺) offer simultaneous photon upconversion, quantum cutting, and temperature sensing for advanced solar cells.

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Area of Science:

Materials Science
Solid State Physics
Optoelectronics

Background:

Developing advanced materials for solar energy conversion is crucial for renewable energy.
Rare-earth-doped phosphors offer unique optical properties for energy applications.

Purpose of the Study:

To develop multifunctional erbium (Er³⁺) and ytterbium (Yb³⁺) codoped NaY(WO₄)₂ phosphors.
To investigate their capabilities in photon upconversion, photon quantum cutting, and luminescence ratiometric temperature sensing.
To explore their potential application in high-performance silicon solar cells.

Main Methods:

Synthesis of Er³⁺ and Yb³⁺ codoped NaY(WO₄)₂ phosphors.
Characterization of their structural and optical properties.
Evaluation of upconversion, quantum cutting, and temperature sensing performance.

Main Results:

Successfully developed multifunctional NaY(WO₄)₂ phosphors codoped with Er³⁺ and Yb³⁺.
Demonstrated simultaneous photon upconversion and photon quantum cutting.
Exhibited luminescence ratiometric temperature sensing capabilities.

Conclusions:

The developed phosphors possess multiple functionalities beneficial for solar energy applications.
These materials present new opportunities for enhancing the efficiency of silicon solar cells.
Multifunctional rare-earth-doped phosphors are promising for next-generation optoelectronic devices.