Английская Википедия:Gradient multilayer nanofilm

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Шаблон:Nanotech Шаблон:Nanomat Gradient multilayer (GML) nanofilm is an assembly of quantum dot layers with a built-in gradient of nanoparticle size, composition or density.

Properties of such nanostructure are finding its applications in design of solar cells[1][2][3] and energy storage devices.[4]

The GML nanostructure can be embedded in the organic material (polymer), or can include quantum dots made of two or more types of material.

Файл:GMLnanofilm.png
Schema of GML nanofilm

Photovoltaic applications

The GML nanofilm only 100 nanometers thick can absorb the entire Sun spectrum (0.3–2.0+ eV). At the same time, gradient of the quantum dots size can create a gradient of the electrochemical potential, acting as an equivalent of built-in electric field inside a nanofilm. This enhances transport of electrons and holes, and improves internal quantum efficiency (IQE) and photocurrent.

Manufacturing

The industrial manufacturing of GML nanofilms represents a challenge. Traditional methods of building nanostructured materials (like spin coating) can't form GML nanostructures, while more effective methods like Atomic Layer Deposition (ALD) or Langmuir-Blodget "microchemical" method.[5] are expensive.

See also

Шаблон:Portal

References

Шаблон:Reflist

External links

  1. Шаблон:Cite conference
  2. Reddy, Damoder and Gilman, Boris Nanophotovoltaic Device with Improved Quantum Efficiency. US Patent Application 20080142075. Freepatentsonline.com. Retrieved on 2012-05-22.
  3. Quantum dot solar cell with quantum dot bandgap gradients. Freepatentsonline.com. Retrieved on 2012-05-22.
  4. Quantum dot ultracapacitor and electron battery. Freepatentsonline.com. Retrieved on 2012-05-22.
  5. Microchemical nanofactories. Freepatentsonline.com. Retrieved on 2012-05-22.