+44 (0)24 7671 8970
More publications     •     Advertise with us     •     Contact us
 
Loading...
{megaLeaderboard}
{normalLeaderboard}
News Article

Insect eyes inspire robust perovskite cell design

News

Stanford team's compound solar cell consists of a honeycomb of perovskite microcells, each encapsulated in a hexagon-shaped scaffold 500 microns wide

Packing perovskite solar cells together, like micro-lenses in the compound eye of an insect, could pave the way to a new generation of advanced photovoltaics, say Stanford University scientists.

In a new study, the Stanford team used the insect-inspired design to protect perovskite from deteriorating when exposed to heat, moisture or mechanical stress. The results are published in the journal Energy & Environmental Science (E&ES).

Most solar devices, like rooftop panels, use a flat, or planar, design. But that approach doesn't work well with perovskite solar cells."Perovskites are the most fragile materials ever tested in the history of our lab," said graduate student Nicholas Rolston, a co-lead author of the E&ES study. "This fragility is related to the brittle, salt-like crystal structure of perovskite, which has mechanical properties similar to table salt."

Eye of the fly

To address the durability challenge, the Stanford team turned to nature. "We were inspired by the compound eye of the fly, which consists of hundreds of tiny segmented eyes," explained Reinhold Dauskardt, a professor of materials science and engineering and senior author of the study. "It has a beautiful honeycomb shape with built-in redundancy: If you lose one segment, hundreds of others will operate. Each segment is very fragile, but it's shielded by a scaffold wall around it."

Using the compound eye as a model, the researchers created a compound solar cell consisting of a vast honeycomb of perovskite microcells, each encapsulated in a hexagon-shaped scaffold 500 microns wide.

"The scaffold is made of an inexpensive epoxy resin widely used in the microelectronics industry," Rolston said. "It's resilient to mechanical stresses and thus far more resistant to fracture."

Tests conducted during the study revealed that the scaffolding had little effect on the perovskite's ability to convert light into electricity.

"We got nearly the same power-conversion efficiencies out of each little perovskite cell that we would get from a planar solar cell," Dauskardt said. "So we achieved a huge increase in fracture resistance with no penalty for efficiency."

Durability

To find out whether the new device would withstand the kind of heat and humidity, the researchers exposed encapsulated perovskite cells to temperatures of 85 degC and 85 percent relative humidity for six weeks. Despite these extreme conditions, the cells continued to generate electricity at relatively high rates of efficiency.

Dauskardt and his colleagues have filed a provisional patent for the new technology. To improve efficiency, they are studying new ways to scatter light from the scaffold into the perovskite core of each cell.

"We are very excited about these results," he said. "It's a new way of thinking about designing solar cells. These scaffold cells also look really cool, so there are some interesting aesthetic possibilities for real-world applications."

Schletter Group: 48 MWp Project in Italy
ENCAVIS Acquires Two More Solar Parks In Spain and Surpasses The Planned Expansion
Maximum profitability with KACO advanced technology for complex solar roofs
Enviromena wins contract to re-power three major solar farms ahead of the summer energy peak
New Swansea University Collaboration to Support Sustainable, Locally Manufactured Solar PV
New Swansea University Collaboration to Support Sustainable, Locally Manufactured Solar PV
Next2Sun Builds World's Largest Vertical PV Plant at Frankfurt Airport
DNV Publishes Bankability Study of Solcast Satellite Irradiance Data
Steel company SSAB switches to fossil-free energy in Italy with PV solution from Solnet
janom Investments enters the Croatian solar energy industry by investing in a 30 MW power plant project
Trina Solar Vertex S+ 505W n-type dual-glass modules enter mass production
BayWa r.e. and 3E sign partnership agreement for monitoring & analytics of global PV portfolio
Accelerating Spain's Energy Transformation: LONGi to supply Naturgy with 1 million modules in new deal
NTR announces corporate PPA with Almac Group to buy energy from Murley Wind Farm, Northern Ireland
Oxford PV sets new solar panel efficiency world record
Order Intake for the Construction of Wind Turbines in Turkey
Trilantic Europe acquires stake in AEROCOMPACT Group
Octopus Energy makes solar farm debut in Germany
Austria-based KOGA Energy, a solar EPC solutions provider, has kicked off.
Exus to acquire 625MW New Mexico solar portfolio
Capcora Accompanies SUSI Partners In Raising Senior Debt For a Polish Renewables Portfolio
Qualitas Energy acquires a 96 MW wind energy project pipeline in Germany
Nordex Group receives orders from the UK for approx. 150 MW
Trina Solar gains EPD certification from UL Solutions and EPDItaly for industry leading modules
Mandarin Oriental Hyde Park, London instals innovative solar tech to decarbonise heating
Efficiency First: The Road to Electrification
SCHLETTER Supplies Austria's Largest PV Roof System
E.ON partners with UK renewable heat innovator Naked Energy
Sonnedix signs innovative EUR500 million loan facility to finance construction of its renewable electricity pipeline in Europe and UK
Construction begins on Glennmont and Ørsted’s Borkum Riffgrund 3 offshore wind farm in Germany
ABB shores up reliable power supply at Southeast Asia’s largest floating solar plant
Sonnedix starts construction of 300MW UK solar PV portfolio

×
Search the news archive

To close this popup you can press escape or click the close icon.
Logo
×
Logo
×
Register - Step 1

You may choose to subscribe to the Solar + Power Magazine, the Solar + Power Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in: