18% Efficiency organic solar cells

Towards High-Efficiency Organic Solar Cells: Polymers and Devices Development

Efficiency enhancement in organic solar cells with ferroelectric polymers.

The recombination of electrons and holes in semiconducting polymer-fullerene blends has been identified as a main cause of energy loss in organic photovoltaic devices. Generally, an external bias voltage is required to efficiently separate the electrons and holes and thus prevent their recombination. Here we show that a large, permanent, internal electric field can be ensured by incorporating a...

Stretchable organic solar cells.

Organic Solar Cells

MRS BULLETIN • VOLUME 33 • JULY 2008 • www.mrs.org/bulletin Abstract Organic solar cells, based on polymer/fullerene-blend films, are advancing rapidly toward commercial viability. In this article, we review recent progress on two issues critical for technological applications: device photovoltaic efficiencies and processing technologies for high-throughput production. In terms of device effici...

Efficiency in Solar Cells

The theoretical efficiency limit is calculated with some attention paid to the laws of physics ruling the limiting behavior of the system. Beginning with single gap solar cell systems, moving onward to tandem cells (solar cells containing several p-n junctions), and ending with solar cells with an intermediate energy band gap (created through an impurity in the system) progress towards maximum ...