Perovskite-Info: the perovskite experts

Perovskite-Info is a news hub and knowledge center born out of keen interest in the wide range of perovskite materials.

Perovskites are a class of materials that share a similar structure, which display a myriad of exciting properties like superconductivity, magnetoresistance and more. These easily synthesized materials are considered the future of solar cells, as their distinctive structure makes them perfect for enabling low-cost, efficient photovoltaics. They are also predicted to play a role in next-gen electric vehicle batteries, sensors, lasers and much more.

Recent perovskite News

Perovskite QDs combine with graphene oxide to create artificial photosynthesis

Apr 28, 2017

Researchers from Sun Yat-Sen University in China have created a composite of perovskite quantum dots and graphene oxide that can reduce CO2 when stimulated with light. It is referred to as the first known example of artificial photosynthesis based on perovskite quantum dots.

Perovskites and GO make for an efficient photocatalyst image

The team prepared quantum dots – semiconductor nanoparticles – of a highly stable cesium–lead halide perovskite, as well as a composite material made of these quantum dots and graphene oxide. Both materials showed an efficient absorption of visible light and strong luminescence. The team used these products to achieve a fundamental step in artificial photosynthesis – the reduction of CO2. To simulate sunlight, they used a xenon lamp with an appropriate filter.

EPFL team shows how light can affect perovskite solar cells' performance

Apr 27, 2017

In a recent study, EPFL researchers demonstrated how light affects perovskite film formation in solar cells. The team showed that, in the two most common methods used today, light can greatly accelerate the formation of perovskite films and control the morphology of their crystals, influencing the efficiency of the resulting solar cell.

The team used confocal laser scanning fluorescence microscopy and scanning electron microscopy to examine how direct light affects the crystal formation when depositing perovskites in layers, a common stage in building a solar cell. The goal is to ensure homogeneity across the perovskite film, as this is linked to superior photovoltaic performance.

Yale team improves the hole transfer material to achieve better stability and efficiency of perovskite solar cells

Apr 26, 2017

A team from Yale University has discovered a modification of perovskite that can increase the stability and efficiency of perovskite solar cells.

The team explained that light usually generates an exciton in most semiconductor materials, a state where an electron is bound to an electron hole via an electrostatic force. In order to produce usable electricity, the bound electron-hole pair has to be separated into a free electron and free electron hole. This is usually done by electron acceptors, which can overcome the binding energy holding the electron-hole pair together. However, since perovskite semiconductors possess exciton binding energies as low as 16 meV, they generally do not require the use of electron acceptors, which eases the process of generating electricity.

A new process yields efficient perovskite-based bottom cells for solar panels

Apr 24, 2017

Researchers at The University of Toledo (UT) in the US have developed an all-perovskite tandem solar cell with excellent conversion efficiency. The new kind of device combines two different cells to harvest different parts of the solar spectrum, resulting in increased total electrical power generated.

Toledo U's perovskite bottom cell image

The team's process enables the fabrication of bottom cells using mixed Sn-Pb perovskite absorbers. The fabrication of the efficient bottom cell, which the researchers say had not been accomplished before, is what is truly innovative about this research work. “Our all-perovskite solar cells have the so-called four-terminal structure, which stacks a wide-band-gap top cell with a low-band-gap bottom cell. The current all-perovskite tandem cells are limited by the lack of efficient bottom cell”.

NREL develops perovskite ink with a long processing window to enable scalable production of solar cells

Apr 18, 2017

Researchers at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) developed a new perovskite ink with a long processing window that allows the scalable production of perovskite solar cells.

NREL's perovskite ink for solar cells image

To create a perovskite film, a coating of chemicals is deposited on a substrate and heated to fully crystalize the material. The various steps involved often overlap with each other and complicate the process. One extremely critical stage requires the addition of an antisolvent that extracts the precursor chemicals, and thus create crystals of good quality. The window for this step opens and closes within seconds, which is detrimental for manufacturing due to the precision required to make this time window. NREL researchers were able to keep that window open as long as 8 minutes.

The University of California-San Diego secures $1.45 million grant for perovskite-based solar cell development

Apr 18, 2017

The California Energy Commission, along with the Regents of the University of California, approved a $1.45 million grant to researchers at the University of California-San Diego (UCSD) to support the development of perovskite solar cells.

USCD is home to varied perovskite-based research, among which is work focused on understanding the charge transport and recombination mechanisms in perovskite based solar cells.

Imec and Solliance create perovskite PV modules with 12.4% efficiency

Apr 11, 2017

Imec, a leading research and innovation hub in nano electronics, energy and digital technologies, and partner in Solliance, announced that it has improved its 4x4cm² perovskite module achieving a certified conversion efficiency of 12.4%.

Imec and Solliance achieve 12.4% efficiency image

The module efficiency was measured under long-term maximum power point (MPP) tracking, testifying to its exceptional stability. At Solliance, this perovskite technology is developed with industrially-applicable processes and with a view towards a rapid market introduction of this promising source of renewable energy.