Info
Info
News Article

Tandem PV Devices Feel The Heat

News

KAUST team show that silicon bandgap gets smaller as the device gets hotter while the perovskite bandgap gets larger

Understanding how solar cell operation changes as it moves from the lab into the real world is essential for optimising their design prior to mass production. KAUST researchers show how perovskite/silicon tandem solar cells function in a sunny and hot environment.

Tandem solar cells have a theoretical efficiency limit of 44 percent, which is beyond the 33 percent limit of conventional solar cells.

"One limitation of this tandem configuration is that it was thought that the perovskite bandgap had to be wider than stable material compositions would allow," says the first author of the study, Erkan Aydin.

New solar cells are tested in the laboratory under standard test conditions. But the ambient temperatures in most areas where solar cells are deployed are much higher than the standard 25 degC, and can fluctuate dramatically, which affects performance.

Aydin and his colleagues investigated the performance of perovskite/silicon tandem solar cells outdoors in a hot, sunny climate. The KAUST team show that while the silicon bandgap gets smaller as the device gets hotter, the perovskite bandgap gets larger.

This shifts the devices away from their ideal operating point and reduces the efficiency of tandem cells optimized at standard test conditions. Encouragingly, this tendency has the effect of lowering the perovskite bandgap, allowing more stable perovskite compositions to be used in tandem solar cells.

"Our research will next focus on pushing the power conversion efficiency of these devices beyond the highest reported single-junction silicon solar cell efficiency of 26.7 percent with improved stability," says Aydin. "These improvements will bring the perovskite/silicon tandem solar cells one step closer to the market."

'Interplay between temperature and bandgap energies on the outdoor performance of perovskite/silicon tandem solar cells' by Erkan Aydin et al; Nature Energy (2020) 14 September 2020

Dr Armin Froitzheim Becomes SOLARWATT Chief Technology Officer
Luxcara Acquires Largest Independent PV Project In Germany From BELECTRIC
SunBrush Mobil Delivers Its New Cleaning Device For PV Tracking Systems To Chile
What Role Can Solar Energy Play In Enabling A Better Future And Meeting The UN Sustainable Development Goals?
Sonnedix Named ESG Global Solar Power Generation Sector Leader By GRESB
New Energy Scout GmbH Becomes Part Of Basler & Hofmann AG
Researchers Pinpoint Way To Improve CIGS Solar Cells
BayWa R.e. Sells Subsidy-free Solar Farm In Spain To Commerz Real’s Impact Fund Klimavest
Midsummer And Rollgum Corp Team Up To Bring Solar Roofs To The Iberian Peninsula
Aerocompact Launches New Long Rail System For Solar Power Plants
BISOL Supreme Facing Exceptional Sales
A Promising Boost To Kesterite Solar Cells
Faber Infrastructure Launches Container-based Power Supply
Azelio And JET ENERGY In MoU To Develop Storage Projects With Solar PV In Africa
EnergyLink3 And C4V Lead Tesla In Race To Less Toxic Mobile Battery Solution
Japan Demands Higher Standards Of Resource Data To Sustain Solar Market Growth
UK'S Largest Battery Ready To Balance The Grid
ULVAC Techno Offers Equipment Support In Japan And East Asia
Ingeteam Supplies Solar Inverters For PV Project Of More Than 100MW In Chile
New Innovation Set To Change Renewable Energy Market
ENGIE And Kiwi Power Enter Netherlands’ Grid Flexibility Market
Midsummer’s Solar Cells Can Reduce Truck Fuel Emissions By Up To 20 Percent
NextEnergy Capital Acquires Its First Asset In Portugal 17.4MWp Solar PV Project
Solar Power As Rental Offer Launched By Aggreko

Info
Info
×
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:
 
X
Info
X
Info
{taasPodcastNotification}