Gradient multilayer nanofilm

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.

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.