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Related Concept Videos

P-N junction01:11

P-N junction

470
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...
470

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Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping
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Highly Efficient Organic/Silicon Hybrid Solar Cells with a MoO3 Capping Layer.

Jiahui Chen1, Zhangbo Lu1,2,3, Xiaoting Wang1

  • 1Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province, College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua 321004, China.

Nanomaterials (Basel, Switzerland)
|October 25, 2024
PubMed
Summary

Adding a molybdenum trioxide (MoO3) film to organic/silicon hybrid solar cells significantly improves charge carrier separation and reduces recombination. This enhances solar cell efficiency and fill factor for sustainable energy applications.

Keywords:
MoO3 filmbuilt-in potentialhigh work functionorganic/Si

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Semiconductor Physics

Background:

  • Organic/silicon (Si) hybrid solar cells offer facile fabrication and high efficiency for sustainable energy.
  • Efficient charge carrier collection and separation at the organic/Si interface are limited by the low work function of poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS).

Purpose of the Study:

  • To enhance the performance of organic/Si hybrid solar cells by addressing charge carrier dynamics at the heterojunction interface.
  • To investigate the effect of a high-work-function interface layer on device performance.

Main Methods:

  • Fabrication of n-Si/PEDOT:PSS solar cells with an integrated molybdenum trioxide (MoO3) interface layer.
  • Characterization of the impact of the MoO3 layer on the built-in potential, charge carrier separation, and recombination at the organic/Si interface.

Main Results:

  • The MoO3 layer significantly increased the built-in potential of the solar cells.
  • An inversion layer was formed near the n-Si surface, facilitating charge separation and inhibiting recombination.
  • The champion solar cell incorporating the MoO3 layer achieved a 16.0% power conversion efficiency and an 80.8% fill factor.

Conclusions:

  • The incorporation of a MoO3 interface layer is a simple yet effective strategy to boost the performance of organic/Si hybrid solar cells.
  • This approach enhances charge carrier management at the heterojunction, paving the way for more efficient photovoltaic devices.