Gradient multilayer nanofilm

From Infogalactic: the planetary knowledge core
Jump to: navigation, search

Lua error in package.lua at line 80: module 'strict' not found. Lua error in package.lua at line 80: module 'strict' not found. 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.

File: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.

The cost-efficient alternative for manufacturing GML nano films is FP ("Flying Particles") method.[6]

References

  1. Lua error in package.lua at line 80: module 'strict' not found.
  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.
  6. Method of forming a flexible nanostructured material for photovoltaic panels.

External links