Ionic liquid partnership targets solar cells

A partnership between G24 Innovations (G24i) and BASF aims to improve both the performance and efficiency of G24i's solar cells using a proprietary dye-sensitised thin film technology.

G24 Innovations (G24i) and BASF have announced a joint development agreement.

The two companies will initiate a program to develop ionic liquids and formulations that further improve both the performance and efficiency of G24i's solar cells using a proprietary dye-sensitised thin film technology.

The photovoltaic cells produced by the G24i are sensitive to far more of the visible spectrum of light than conventional solar cells.

All sorts of light sources can be used to generate power, even at relatively low levels of light intensity.

The photovoltaic process used is roughly analogous to photosynthesis in plants.

A special ruthenium dye assumes the role of chlorophyll, turning light into electrical energy in a chemical process.

Specifically adapted to the electrode and dye system, the ionic liquids are key to ensuring that the solar cell will generate power in a reliable and stable manner.

G24i's dye-sensitised thin film technology is based on solar cells originally developed by Dr Michael Graetzel of the Swiss Institute of Technology (Ecole Polytechnique Federale de Lausanne (EPFL).

Solar cells and products developed using this technology are lightweight, durable and ideal for integration or embedding into a wide range of products.

G24i is developing solar products to power a range of portable electronics such as mobile telephones but also examines the use in smart textiles and building-integrated materials.

BASF is manufacturing ionic liquids - salts which are liquid below 100C - that are suitable for use across a broad range of different applications ranging from processing chemicals and polymers, to engineering liquids like hydraulic liquids or lubricants, to uses in electro-chemistry.

Clemens Betzel, President of G24i said: "BASF's knowledge and experience in the field of chemicals, coupled with G24i's specific research and development capabilities will together make a huge impact on the level of innovation which can be achieved".

He continues: "G24i's product represents a technological breakthrough that will make solar energy a viable renewable energy option for the first time for a range of new industries and geographies".

"Whilst BASF has been a supplier of ionic liquids to G24i for some time, this new agreement will allow us to work more closely on the selection of suitable liquids and formulations that we will test at our specialist facility".

"We will share the results of these tests and work with BASF to continuously enhance the quality of our product".

"We are enthusiastic about G24i's technology, as they are the first company in the world to produce this new class of solar cells at an industrial scale and we are bringing our research and development expertise in ionic liquids into our co-operation", said Dr Walter Gramlich, President of BASF's Operating Division.

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