An international team, led by Berkeley Lab scientists, has demonstrated a breakthrough in the design and function of nanoparticles that could make solar panels more efficient by converting light usually missed by
solar cells into usable energy.
Machines do the majority of work: cutting semiconducting materials, such as crystalline silicon, into wafers, turning them into solar cells, and assembling
the solar cells into solar panels.
Scientists are reporting a breakthrough in which they have integrated
solar cells into a graphene - based electronic skin, raising the possibility of prosthetic limbs that are both sensitive to touch and entirely self - powered.
Audi has announced that it has teamed up with Alta Devices, a subsidiary of the Chinese solar - cell specialist, Hanergy, to integrate thin - film
solar cells into panoramic glass roofs.
His team is now reporting a breakthrough in which it has integrated
solar cells into a graphene - based electronic skin, raising the possibility of prosthetic limbs that are both sensitive to touch and entirely self - powered.
According to Colsmann, another field of application is the integration of
solar cells into buildings: Since the glass facades of high - rise buildings must often be shaded, it is an obvious option to use organic solar modules for transforming the absorbed light into electric power.
What could go wrong when you put the power of the Internet and
solar cells into the hands of children in the developing world?
This roll - to - roll coating method makes incorporating
solar cells into existing manufacturing processes much simpler.
Not exact matches
This type of
solar cell is lightweight and affordable, but requires very careful processing so the materials used mix and crystallize properly
into thin films.
The goal was to build what are known as high - efficiency
solar panels that feature premium
cells that can convert sunlight
into energy at a materially higher percentage and at a cost on par with what SolarCity had been paying to Chinese manufacturers for more standard - efficiency
solar panels.
The partnership will see Tesla Motors integrate the
solar cells and modules that Panasonic will begin manufacturing at the Buffalo facility next year
into a
solar energy system that will work with its energy storage products, the Powerwall and Powerpack.
A typical
solar cell has a silicon semiconductor that absorbs sunlight directly and converts it
into electrical energy.
For example, current silicon - based
solar cells convert realistically only about 25 percent of sunlight
into electricity, so efficiency is an issue, says Calley Eads, a fifth - year doctoral student in the UA's Department of Chemistry and Biochemistry who studies some of the properties of these new materials.
When combined with other polymers, the structures could also convert light
into electricity and serve as the basis for a novel type of
solar cell.
SOLAR cells built
into clothing sound like a great way to charge gadgets while on the move, but for the idea to work the
cells will have to be both flexible and cheap.
SOLAR cells have an unfortunate habit of reflecting back much of the light that hits them, rather than converting it
into electricity.
Because the metal coatings absorb a lot of light, reflecting only a narrow set of wavelengths, Capasso suggests that they could also be incorporated
into optoelectronic devices like photodetectors and
solar cells.
North Carolina - based Semprius is making ultra-efficient
solar cells as thin as a pencil tip and flexible enough to roll
into a tube or print on plastic or cloth.
This makes possible the conversion of
solar energy
into chemical energy that is stored as hydrogen gas formed inside the BPEC
cell.
Alternatively, adding a catalyst turns them
into carbon nanotubes, which have been used in everything from
solar cells to biosensors.
This research provides a new insight
into the movement of electrons that could potentially change the way
solar cells and semiconductor devices are built.
With the metal - insulator - semiconductor
solar cell directly connected to the water - splitting oxidized cobalt catalyst, water was efficiently split
into oxygen with exposure to sunlight.
Some
solar cells convert sunlight
into electricity more efficiently when loud music is played to them — as long as it is pop rather than classical.
Most commercial
solar cells use inorganic semiconductors to convert sunlight
into a steady stream of electrons that can serve as a power source.
The coating, applied with a technique that could be incorporated
into manufacturing, opens a new path for developing low - cost, high - efficiency
solar cells with abundant, renewable and environmentally friendly materials.
Badding's
solar cell functions just like a common, rigid kind, but with a fiber - optic housing that enables it to bend
into a loop.
A team of researchers led by the University of California San Diego has for the first time observed nanoscale changes deep inside hybrid perovskite crystals that could offer new insights
into developing low - cost, high - efficiency
solar cells.
Despite all the metals and raw materials that go
into making
solar cells and wind turbines, these sources of low - carbon renewable electrify will have a low climate and environmental impact through 2050
With this technique, the Empa team has again been able to significantly increase the energy conversion efficiency from sunlight
into electricity using CIGS thin film
solar cells on flexible plastic foils — to a new record level of 20.4 %, representing a marked improvement over the previous record of 18.7 % established by the same team in May 2011.
The smart window controls the transmission of visible light and infrared heat
into the building, while the new type of
solar cell uses near - UV light to power the system.
Alternatively, for a sensor or
solar cell, some fraction of light will never make it to the detector to be collected and turned
into an electrical signal.
Helping this potential future along, chemist John Badding and his colleagues at Pennsylvania State University recently embedded
solar cells within flexible wires that can be woven
into fabric.
New types of
solar cells and flexible transistors are also in the works, as well as pressure and temperature sensors that could be built
into electronic skin for robotic or bionic applications.
Solyndra is now churning out copper - indium - gallium - selenide (CIGS) thin - film
solar cells, wrapped
into a cylindrical shape and encased in glass.
Now, the team led by Empa researcher Ayodhya N. Tiwari has made a major leap forward: the researchers are presenting a new manufacturing technique for CIGS
solar cells, in which tiny quantities of sodium and potassium are incorporated
into the CIGS layer.
By engineering nano - size branches and trunks
into plastic
solar cells, researchers have improved their ability to harvest the energy in sunlight
Fuel
Cells Electricity from any source, such as
solar, wind and even coal, can be used to break up water molecules
into their hydrogen and oxygen components in a device called an electrolyzer.
All through a sunny day, through the diing evening hours, photovoltaic
cells on the roof of an energy - efficient house with supplementary
solar power convert the energy of sunlight
into electricity.
«We have discovered that by inserting a very thin film of gallium arsenide
into the connecting junction of stacked
cells we can virtually eliminate voltage loss without blocking any of the
solar energy,» says Dr. Salah Bedair, a professor of electrical engineering at NC State and senior author of a paper describing the work.
Stacked
cells are currently the most efficient
cells on the market, converting up to 45 percent of the
solar energy they absorb
into electricity.
The seemingly too small rubidium cation was successfully integrated
into perovskite
solar cells.
While some of today's
solar cells use a blend of cadmium and tellurium to convert light
into electricity, adding the optimum amount of selenium in the right places could help increase efficiency from the current mark of about 22 percent to levels approaching the theoretical limit of 30 - 33 percent.
«We have shown that the amount of selenium incorporated
into the cadmium - tellurium controls whether the small crystals inside the
solar cell form as crystal structure A or crystal structure B,» Poplawsky said.
He has not yet incorporated the material
into a working
solar cell, but his initial experimental results look promising.
Fox aims to turn these diamond films
into a new kind of
solar cell, one that generates electricity by absorbing heat rather than visible - light wavelengths.
«We are envisioning
solar cell layers on glass facades, which let part of the light
into the building while at the same time creating electricity,» says Thomas Mueller.
«It's conceivable that one day we might see them included in paint or in
solar cells incorporated
into windows.
The efficiency of
solar cells depends on trapping and absorbing light and can be increased by using a back reflector: a mirror behind the
solar cell material that reflects light that was not absorbed and leads it back
into the
solar cell.
«Ideally, in a
solar cell we would want light coming in to turn
into several electrons,» said Max Grossnickle, also a graduate student in Gabor's lab and the research paper's co-first author.
Ultimately, though, concentrated
solar power plants must compete on price with photovoltaic power plants that convert sunlight directly
into electricity, using
solar cells.