Nanotech to Improve Satellites and Solar Cells

March 9, 2006

More efficient space solar cells could mean better imagery satellites and improved solar energy technology. Scientists at the NanoPower Research Labs at Rochester Institute of Technology, led by director Ryne Raffaelle, are using nanotechnology to explore this possibility through a project funded by an $847,109 grant from the U.S. Department of Defense.

The project aims to take current state-of-the-art solar cells used for space power to the next level by developing nanostructured materials and, ultimately, by producing nanostructured cells. The program may extend to three and half years, with total funding reaching $3 million.

“If successful, the results of this program will improve current solar array and satellite technology, and lay the foundation for long-term improvement in our ability to use solar energy,” Raffaelle says.

Unique to this project is the ability to exploit the fundamental behavior of nanoscale crystals, also known as quantum dots, which alter the way a solar cell absorbs light and converts it into electricity. According to Raffaelle, the electrical, optical, mechanical and even thermal properties of nanomaterials can be controlled by changing the particle size, making them highly useful in semiconductor device development.

Today’s current solar-cell technology used for space power relies upon three individual photovoltaic junctions used in a series. These so-called triple-junction solar cells—consisting of the chemical compounds, germanium, gallium arsenide and indium gallium phosphide—are grown latticed-matched on top of one another. Raffaelle’s team will augment the middle cell in the three-layered sandwich with a quantum dot array to enhance its short-circuit current and improve the overall efficiency of the triple junction cell.

“The use of the quantum confinement offered by nanostructured materials provides us with a new means of breaking out of the normal design constraints associated with ordinary crystalline device growth,” says Raffaelle. “The theoretical improvements that this can provide are truly remarkable. It’s our job to turn these theories into experimental realities.”

Raffaelle’s nanotechnology research illustrates the possibilities of the newly opened IT Collaboratory on the RIT campus.

“When Governor Pataki announced the creation of the IT Collaboratory at RIT, he did so with the understanding that the center would participate in the creation of a stronger, more vibrant economy as a result of its technological innovations,” says Russell Bessette, M.D., executive director of NYSTAR. “This DOD award will help further cement RIT’s role as an engine for economic growth and opportunity in the Finger Lakes region as well as statewide.”

Source: Rochester Institute of Technology

Explore further: Carbon Capture: key green technology shackled by costs

Related Stories

Pitt project aims to turn world on to DC power

November 17, 2015

In the late 1880s, Pittsburgh native son George Westinghouse (using the work and genius of Nikola Tesla) won the campaign to base the United States' electric power grid on alternating current (AC). Thomas Edison, a proponent ...

Clean energies in need of a long term vision

November 17, 2015

Although cheaper and cleaner than fossil fuel-based energy, electricity derived from renewable sources lacks clear regulations that would enable it to be used at large scale.

Mirage maker

October 30, 2015

Aditya Sadhanala wanders over to the wall, turns a pulley, and a wooden box about a metre squared swings up and away. Below it gleams an array of carefully positioned lasers, deflectors and sensors surrounding a piece of ...

Recommended for you

A common mechanism for human and bird sound production

November 27, 2015

When birds and humans sing it sounds completely different, but now new research reported in the journal Nature Communications shows that the very same physical mechanisms are at play when a bird sings and a human speaks.


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.