Like us on Facebook and Follow us on Twitter


Directory:G24 Innovations Limited

Lasted edited by Andrew Munsey, updated on June 15, 2016 at 12:52 am.

  • One error has been found on this page. Administrator will correct this soon.
  • This page has been imported from the old peswiki website. This message will be removed once updated.

&lt&lt A Congress:Top 100 Technologies -- RD Energy Technology &gt&gt

There was an error working with the wiki: Code[1]

There was an error working with the wiki: Code[2]

Image:G4 innovation G24i Dye Sensitized Thin Film 200.jpg

According to their website, G24 Innovations Limited ("G24i") utilises the latest breakthrough in material science and nanotechnology creating a new class of advanced solar cells which are the closest mankind has come to replicating nature’s photosynthesis. G24i’s DYE SENSITISED THIN FILM manufactures a uniquely thin, extremely flexible and versatile nano-enabled photovoltaic (solar) material that converts light energy into electrical energy, even under low-light, indoor conditions. Thus, even in the absence of direct sunlight, electric energy can be generated in both a convenient and efficient manner.

Located in Cardiff, Wales, G24i became operational in 2007. The fabrication plant is 18,000 square feet and is set on 9.3 hectares (23 acres). G24i's factory will be the first facility ever to produce solar cells while relying exclusively on renewable energy, including solar, wind, geothermal and other green sources.


Official Website



Awards & Recognition


Image:G2405 solar charger 150.jpg


The G24i Solar Charger Series provides a low cost, mobile power solution for the global community. It is compatible with most mobile phones, MP3 players, cameras and radios and can be provided with accessories such as a rechargeable battery pack and LED light.Over 1.5 billion people throughout the world have no access to electricity. It is this overwhelming need for affordable power solutions that forms the new growth market for cell phone operators. Due to the lack of electricity in these regions of the world, many users spend considerable amounts of time and money searching for means to charge their mobile phones. G24i provides a solution for handset manufacturers, network operators and users themselves to have access to power 24/7.G24i's series is a family of solar chargers that work using the power of light (indoors or outdoors) and is initially available in 1/2 watt and 1 watt configurations. The G24i series is also modular meaning than users can start with a small charger and add extra capacity and applications as they can afford it.

How it Works

G24i’s advanced DYE SENSITIZED THIN FILM works on a very different principle than traditional polycrystalline where the absorption of light and the separation of charge carriers do not take place in the same material. The cell consists of two conducting electrodes (usually in the shape of small plates) in a sandwich configuration with a redox electrolyte separating the two. On one of the electrodes a compact, but very porous layer of TiO2 is constructed. On the particles of TiO2 a dye is absorbed.

When light falls onto the dye sensitized solar cell it is absorbed by the dye. The electrons that are excited, due to the extra energy the light provides, can escape from the dye and into the TiO2 and diffuse through the TiO2 to the electrode. They are eventually returned to the dye through the electrolyte.

The dye sensitized cell is made from lower cost materials than the conventional type with silicon wafers. TiO2 is a very common material (also used in toothpaste and sun lotion) and the dye can be an organic type like the colouring you find in blackberries.

Dye sentisitized solar cells are photoelectrochemical cells that use photo-sensitization of wide-band-gap mesoporous oxide semiconductors. These cells were invented by Michael Graetzel et al.1) in 1988 and are also known as "Graetzel cells".

These cells are extremely promising because they are made of low-cost materials and do not need elaborate apparatus to manufacture. The cells have a simple structure that consists of two electrodes and an iodide-containing electrolyte. One electrode is dye-absorbed highly porous nanocrystalline titanium dioxide (nc-TiO2) deposited on a transparent electrically conducting substrate. The other is a transparent electrically conducting substrate only. The cells have been compared to photosynthesis because they use the redox reaction of the electrolyte. The energy conversion efficiency of the cells has not yet reached the level of silicon solar cells. The current energy conversion efficiency is about 10%, as was reported by Graetzel et al.

It is thought that the energy efficiency can rise beyond the Shockley-Queisser limit of 32%.




G24i’s technology has reduced capital manufacturing costs, a lower energy footprint, environmentally friendly raw materials and the ability to produce electricity in low light, outdoor conditions and indoor lighting.


A simple, convenient means of keeping these devices powered, even when there is no opportunity to recharge them through the grid.

Power for mobile and LED lighting systems.

Lightweight portable power systems for tents or fixed structures.

Water purification, radios, refrigerators and cooling

New, building-integrated products, awnings, shades and windows that will enable businesses to cut the day-to-day energy use of their offices and other facilities.

Solar powered systems that yield added security for uninterruptible power supplies or provide remote power for sensors and security surveillance systems.

Signage, billboards and other forms of advertising that have their own self-contained, renewable power sources.

Intelligent garments that can charge batteries silently and in low light or artificial light, including high-visibility jackets, jackets with GPS, hats, jackets and bags with lights, and jackets with back-up power.

Flexible charging systems for sensors, surveillance, satellite telephones, emergency lighting, signage and other critical systems used by police officers and other first responders.

Flexible alternative power systems built into textiles that can be manufactured in a variety of patterns and used in tents, awnings and a variety of other portable structures.

On-vehicle power supply and charging capabilities for trailers, motor homes and mobile communication cent


Michael Graetzel Patents


Company: G24 Innovations Limited

In 1988, Dr. Michael Graetzel at Ecole Polytechnique Fédérale de Lausanne (EPFL) in Switzerland created the "Graetzel Cell" which utilses nanotechnology instead of using a single large titanium dioxide (titania) semiconductor, he worked with a sponge of small particles, each about twenty nanometres in diameter, coated with an extremely thin layer of pigment. This method increased the effective surface area available for absorbing the light by 'many times'- now the sunlight was efficiently converted into an electric current. Since the 1970's, many attempts have been made to create a better solar cell, the "Graetzel Cell" represented a significant break through in solar cell technology.

For the past 18 years, Dr. Michael Graetzel along with his team of researchers at EPFL have worked to perfect this revolutionary technology. Over the past 5 years, Konarka Technologies has further developed the "Graetzel Cell" by adapting it to extremely lightweight flexible substrates. Additionally, Konarka acquired Siemens Polymer Solar Cell Technology Division in Nuremberg, Germany, creating an IP portfolio second to none in the world.

In 2006, G24 Innovations acquired a license to manufacture this technology in Europe, with unlimited worldwide distribution rights, which included all current and orward intellectual property. G24i will commercialise this technology by utilising its proprietary, "roll to roll", advanced manufacturing.


Major Shareholders

G24 Innovations Limited is a UK based, privately held company. They have assembled an outstanding management and advisory board which consists of Clemens Betzel, former president of United Technologies Europe Howard Sutton, former International Engineering Director for Clearlab International Dr. Kevin Tabor, who holds a PhD in chemistry (performing post graduate studies at EPFL where he had the opportunity to work with Graetzel inventor of Dye Sensitive Solar Cell), and has been a member of the scientific community for over 26 years Robert Hertzberg, former Speaker of the California State Assembly, 2000-2002, and candidate for Los Angeles Mayor in the 2005 election Mickey Kantor, U.S. Secretary of Commerce from 1996-1997 and US Trade Representative from 1993-1996 John Hartnett, Senior Vice President for Global Markets, Palm, Inc. and Matt Davis, who has a 16 year history as an investment banker with Credit Suisse First Boston, Donaldson Lufkin and Jenrette, Drexel Burnham Lambert and Bankers Trust and was responsible for DLJ and CSFB's western U.S. energy and power investment banking practices in 2000-2001 as well as other distinguished members from various industry sectors.

Inventor: Michael Graetzel

18 years.


Google > G24 Innovations Limited

G24i bags another award - G24 Innovations (G24i) has won the Premier Product Award for its next generation dye-sensitised thin film solar cell technology at the Business Commitment to the Environment (BCE) Environmental Leadership Awards.(Renewable Energy Focus July 16, 2008)

Image:G24i dye solar 95x95.jpg

Directory:Solar > Directory:Thin Film Solar > Directory:Thin Film Solar > G24 Innovations - Automated "roll-to-roll" manufacturing process transforms a lightweight roll of metal foil into a 100-pound half-mile of G24i’s Dye Sensitized Thin Film in less than three hours. This material is rugged, flexible, lightweight and generates electricity even indoors and in low light conditions.

G24 Innovations Announces Large-Scale UK Production Of Groundbreaking Next-Generation Solar Cells - G24i announces that it has located a factory for large-scale production in Cardiff, Wales. When it becomes fully operational in early 2007, the 187,000 sq ft plant set over 23 acres will be the first in the world to produce dye-sensitised solar cells (DSSC) on a commercial scale. G24i's factory also aims to be the first facility ever to produce its renewable energy products relying exclusively on solar, wind, geothermal and other green sources to meet its own energy needs. (GreenJobs October 17, 2006)

Other Coverage

G24 Innovations Limited (BusinessWeek overview)


See Talk:Directory:G24 Innovations Limited

Related Technologies

Solar Thin Film




Wentloog Environmental Centre

Wentloog, Cardiff


T : +44 (0) 29 2083 7340

F : +44 (0) 29 2083 7341

Company registered in England and Wales No. 05775992

VAT registration No. 897 7576 34

E-Mail: []

See also



Directory:Solar - index of resources

There was an error working with the wiki: Code[1] | News:2009:Solar | News:2006-2008:Solar

PowerPedia:Solar Energy - Encyclopedic review of history and future

Directory:Solar Energy Research and Development


Directory:Solar Problems


Directory:Concentrated Solar Power

Directory:Solar Infrared Harvesting

Directory:Solar PhotoVoltaics

Directory:Home Generation:Solar PV

Directory:Photovoltaic Research and Development

Directory:Solar Thermal

Directory:Home Generation:Solar Heating

Directory:Thin Film Solar

Directory:Solar:Photosynthesis Imitation

Directory:Solar Paint

Directory:Dye Solar Cells

Directory:Solar Tower

Directory:Floating Solar Chimney

Directory:Space Based Solar Power

Directory:Solar Sails

Directory:Solar Windows


Directory:Plastic Solar Cells

Directory:Silicon - more efficient uses, alternatives, methods

Directory:Black Silicon

Directory:Synchronous Solar Heliostat

Directory:Solar:Installation and Consultation



Directory:Solar Applications



Directory:Solar Hydrogen

Directory:Walipini Underground Greenhouses

OS:Solar Ethanol - distiller design

Directory:Energy from Roadways

Directory:Solar Pavement - black-body absorption of the asphalt

There was an error working with the wiki: Code[2]

There was an error working with the wiki: Code[1]