The solar cells are made of uniform 500 - nanometer - high pillars of cadmium sulfide embedded in a thin film
of cadmium telluride.
If production
of cadmium telluride solar panels increases substantially, it could trigger a scarcity of tellurium, raising the price for that type of panel.
Thanks to the rising cost of coal and natural gas — as well as the short - term cost benefits
of cadmium telluride, and falling costs of silicon and other solar options — the National Renewable Energy Laboratory estimates that solar energy could reach nationwide grid parity by 2017.
First Solar, Inc. of Tempe, Arizona USA, a maker
of cadmium telluride CdTe - based thin - film solar cells, reported that the company will begin developing and building a 200 - megawatt (MW) ac photovoltaic (PV) solar power plant in Twiggs County, Georgia USA.
First Solar's solar cells — the U.S. best seller — produce electricity when sunlight strikes a thin film
of cadmium telluride sandwiched between glass.
The least expensive solar cells today are made using thin films
of cadmium telluride.
Kotov and his colleagues shined circularly polarized light on particles
of cadmium telluride in a solution.
A twisted ribbon
of cadmium telluride nanoparticles.
Metals can be repurified and given back to us in the form
of the cadmium telluride compound.
In experiments conducted thus far, the ions have been mounted in quantum dots made
of cadmium telluride (CdTe) or indium arsenide (InAs).
Not exact matches
The 1.2 x 2 meter modules are expected to become commercially available at 420 - 445 watts with efficiencies
of over 17 %, which is a testament to the thin film solar maker's remarkable progress with
cadmium telluride PV.
While most
of its peers make silicon - based panels, First Solar manufactures thin - film panels made with
cadmium -
telluride, which absorbs more frequencies
of light and uses fewer materials.
«America is quickly falling behind in clean energy, trading Middle Eastern oil for cheap Chinese solar, batteries and wind turbines,» says Chris Rivest, co-founder
of Berkeley, Calif. — based SunPrint, which is developing technology to print
cadmium telluride thin - film photovoltaic cells.
Surprisingly, they identified that two types
of solar cells (silicon and
cadmium telluride) can vary in energy output by 5 % or more in tropical regions, where most
of the emerging solar cell markets are located.
Cadmium -
telluride, however, has an advantage over silicon because it can absorb the same amount
of sunlight with 98 percent less semiconducting material, thus reducing the overall cost
of the solar panel.
Yet,
cadmium telluride commands only about 30 percent
of the thin - film market, according to DoE statistics, compared with amorphous silicon cells (such as those produced by Sharp and ECD Ovonics), which account for more than 60 percent; CIGS cells make up just about 1 percent
of this market.
Enter thin - film solar cells — devices that use a fine layer
of semiconducting material, such as silicon, copper indium gallium selenide or
cadmium telluride, to harvest electricity from sunlight at a fraction
of the cost.
The team has shown that its nickel oxide film is compatible with many different kinds
of semiconductor materials, including silicon, indium phosphide, and
cadmium telluride.
He is researching ways to meet this goal through the use
of materials including amorphous silicon (a-Si), copper indium diselenide (CIS) and
cadmium telluride (CdTe) to exploit silicon's efficiency and keep down costs.
For their outstanding contribution in the field
of crystals
of cadmium - mercury -
telluride (CMT) leading to the application
of detectors made from CMT to the successful development
of thermal imaging.
The company expects to resume full production by year - end with
cadmium -
telluride panels that will be able to convert 12.5 percent to 13 percent
of the energy in sunlight into electricity.
Indiana energy holding company Vectren Energy Delivery (Vectren), has selected First Solar, Inc. to construct the 50 - megawatt (MW)
cadmium telluride (CdTe) thin - film solar array sketched out last month as part
of Vectren's long - term plan for electric generation.
If the solar industry has become dependent on the short - term low - cost
cadmium telluride option, long - term scarcity could end up moving solar electricity back out
of grid parity for many people.
What may really help to lower the cost
of solar are new materials — especially semiconductors made from the compound
cadmium telluride.
Thin - film silicon technologies from turn - key vendors will be ramping up in large scale during the second half
of 2008, while
cadmium telluride (CdTe) module producers such as First Solar
Solar Frontier's monolithic thin - film modules are spec'd at approximately 12.2 percent efficiency, which is a relatively strong number in the thin film world, a bit better than First Solar's 11.7 - percent - efficient
cadmium telluride material, but still trailing the 14 percent to 22 percent module efficiency
of the crystalline silicon vendors.
FS's
cadmium -
telluride solar cells technology is definitely gaining adherents in both technical and commercial side
of the industry.
The solar cells — made often
of silicon or
cadmium telluride — rarely cost more than 20 percent
of the total cost.
According to the university, the cheapest solar cells today are based on a thin film
of insoluble
cadmium telluride.
The researchers investigated 4 types
of solar cells: multi-crystalline silicon (with an efficiency
of 13 %), mono - crystalline silicon (14 %), ribbon silicon (11.5 %), and thin - film
cadmium telluride (9 %).
Harvey, who has an impressive command
of technical data, worries that toxic
cadmium telluride used in the thin - film panels will escape into the environment, and he isn't soothed by Chevron's assurances that it will spray polymer - based binders on the disturbed soil to keep it from blowing around.