Nav: Home

Skoltech researchers developed new perovskite-inspired semiconductors for electronic devices

May 13, 2019

The collaborative effort of researchers from Skoltech, SB RAS Nikolaev Institute of Inorganic Chemistry, and RAS Institute for Problems of Chemical Physics translated into the development of advanced lead-free semiconductors for solar cells, based on complex antimony and bismuth halides. The results of their study were published in the Journal of Materials Chemistry A and showcased on the journal's cover page.

The solar cells based on complex lead halides with a perovskite-type structure are coming into sharp focus thanks to their low cost, ease of manufacturing and enhanced light-conversion efficiency of >24%. However, their mass production and wider use are hampered by toxicity and low stability of complex lead halides. To overcome these obstacles, researchers worldwide are working on designing alternative lead-free photoactive materials, particularly, based on bismuth and antimony halides. So far these solar cells have displayed poor light-conversion performance, which suggests that the charge carriers are not generated efficiently enough in the photoactive layer or have difficulty reaching the electrodes.

The team of researchers from Skoltech, SB RAS Nikolaev Institute of Inorganic Chemistry, and RAS Institute for Problems of Chemical Physics showed that the actual reason behind this is the non-optimal structure of the bismuth and antimony compounds.

"We found out that unhindered vertical transport of holes and electrons, which is essential for efficient operation of solar cells, is prevented by the low dimensionality of the anionic sublattice in these compounds, which is typically 0D and sometimes 1D or very rarely 2-D. As a consequence, this class of materials can work efficiently in lateral photodetectors but not in solar cells," explains professor Pavel Troshin of the Skoltech Center for Energy Science and Technology.

Earlier, the same team suggested increasing the lattice dimensionality in bismuth and antimony complexes by introducing linker molecules, such as molecular iodine. Using this approach, which was presented in Chemistry: A European Journal, the scientists have succeeded in creating new semiconductor materials based on complex halides of bismuth and antimony with iodine, which are currently the subject of intensive research worldwide.

The same team has also designed a fundamentally new family of solar cell materials based on the perovskite-like complex antimony bromides, ASbBr6(where A is a positively charged organic ion). The ASbBr6-based solar cells have exhibited record-high light-conversion efficiency for antimony and bismuth halides. The results of this study were published in the journal Advanced Energy Materials. According to the project lead Pavel Troshin, a real breakthrough in their research came with this study, which opens up new horizons in the development of new semiconductor materials for perovskite electronics.
This study was made available online in December 2018 ahead of final publication in print in March 2019.

Skolkovo Institute of Science and Technology (Skoltech)

Related Solar Cells Articles:

Solar cells more efficient thanks to new material standing on edge
Researchers from Lund University in Sweden and from Fudan University in China have successfully designed a new structural organization using the promising solar cell material perovskite.
Printable solar cells just got a little closer
A University of Toronto Engineering innovation could make printing solar cells as easy and inexpensive as printing a newspaper.
A big nano boost for solar cells
Solar cells convert light into electricity. While the sun is one source of light, the burning of natural resources like oil and natural gas can also be harnessed.
Game changer for organic solar cells
Researchers develop a simple processing technique that could cut the cost of organic photovoltaics and wearable electronics.
Physics, photosynthesis and solar cells
A University of California, Riverside assistant professor has combined photosynthesis and physics to make a key discovery that could help make solar cells more efficient.
Throwing new light on printed organic solar cells
Researchers at the University of Surrey have achieved record power conversion efficiencies for large area organic solar cells.
A new way to image solar cells in 3-D
Berkeley Lab scientists have developed a way to use optical microscopy to map thin-film solar cells in 3-D as they absorb photons.
Toward 'greener,' inexpensive solar cells
Solar panels are proliferating across the globe to help reduce the world's dependency on fossil fuels.
A new technique opens up advanced solar cells
Using a novel spectroscopic technique, EPFL scientists have made a much-needed breakthrough in cutting-edge photovoltaics.
OU physicists developing new systems for next generation solar cells
University of Oklahoma physicists are developing novel technologies with the potential to impact utility-scale energy generation, increase global energy capacity and reduce dependence on fossil fuels by producing a new generation of high efficiency solar cells.

Related Solar Cells Reading:

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Do animals grieve? Do they have language or consciousness? For a long time, scientists resisted the urge to look for human qualities in animals. This hour, TED speakers explore how that is changing. Guests include biological anthropologist Barbara King, dolphin researcher Denise Herzing, primatologist Frans de Waal, and ecologist Carl Safina.
Now Playing: Science for the People

#SB2 2019 Science Birthday Minisode: Mary Golda Ross
Our second annual Science Birthday is here, and this year we celebrate the wonderful Mary Golda Ross, born 9 August 1908. She died in 2008 at age 99, but left a lasting mark on the science of rocketry and space exploration as an early woman in engineering, and one of the first Native Americans in engineering. Join Rachelle and Bethany for this very special birthday minisode celebrating Mary and her achievements. Thanks to our Patreons who make this show possible! Read more about Mary G. Ross: Interview with Mary Ross on Lash Publications International, by Laurel Sheppard Meet Mary Golda...