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Related Concept Videos

P-N junction01:11

P-N junction

416
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...
416

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Dual-Functional Photonic Battery Enabling Dynamic Radiative Thermal Management and Power Supply.

Pan Wang1,2, Weirong Xie1,2, Jin Zhang1,2

  • 1State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.

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A novel photonic battery integrates dynamic thermal management with electrical power supply for energy-efficient buildings. This dual-function material enhances sustainability and reduces energy consumption and CO2 emissions.

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Area of Science:

  • Materials Science
  • Energy Storage
  • Sustainable Building Technologies

Background:

  • Dynamic thermal management materials are crucial for energy-efficient buildings but often lack integrated power supply.
  • Existing solutions are single-function, failing to provide continuous power during outages.

Purpose of the Study:

  • To demonstrate a photonic battery combining dynamic radiative thermoregulation with electrical power supply.
  • To develop a silicon-based unit for all-season temperature regulation and energy storage.

Main Methods:

  • Fabrication of a silicon-based photonic battery device.
  • Characterization of infrared emissivity regulation and energy storage performance.
  • Proposal of a reversible ion-interaction-induced phase change mechanism.

Main Results:

  • The device exhibits dual functionality with high infrared emissivity regulation (0.53 at 8-13 µm).
  • Superior energy storage performance was achieved, including high specific capacity (≈3271 mAh g⁻¹) and areal capacity (≈0.38 mAh cm⁻²).
  • Simulations predict up to 18.4% reduction in building energy consumption and significant CO2 emission reduction.

Conclusions:

  • The developed photonic battery offers a novel solution for integrated thermal management and power supply.
  • This technology represents a significant advancement in energy-saving electro-driven dynamic materials for global sustainability.
  • The proposed mechanism enables continuous electro-optical-thermal transformation and infrared tunability.