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

Surface engineering improves the stability of perovskite-based electrocatalysts for fuel cells

Aug 30, 2016

Researchers at MIT tackled the known problem of degradation suffered when perovskite oxides, promising candidates for electrodes in energy conversion devices like fuel cells, are exposed to water or gases such as oxygen or carbon dioxide at elevated temperatures.

The scientists explain that this degradation occurs as the surfaces of these perovskites get covered up by a strontium oxide–related layer, and this layer is insulating against oxygen reduction and oxygen evolution reactions, which are critical for the performance of fuel cells, electrolyzers and thermochemical fuel production. This layer on the electrode surface is detrimental to the efficiency and durability of the device, causing the surface reactions to slow down by more than an order of magnitude.

Layered material improves perovskite solar cell stability

Aug 28, 2016

Researchers from the Graphene Flagship, working at the Istituto Italiano di Tecnologia (IIT) and the University of Rome Tor Vergata, show that interface engineering with layered materials is important for boosting perovskite solar cell performance and that the lifetime of perovskite solar cells is significantly enhanced by using few-layer molybdenum disulphide (MoS2) flakes (a semiconductor material with a layered structure).

The team managed to significantly enhance the stability of perovskite solar cells (PSCs) by including few-layer MoS2 flakes as an active buffer layer in the cell design. These PSCs retain 93% of the initial light conversion efficiency after 550 h, compared to only 66% for cells without the MoS2 buffer layer. This represents an important step towards viable PSCs, especially as the addition of the MoS2 interface layer is compatible with low-cost solution processing techniques.

Perovskite-based phosphor-based white light converter

Aug 28, 2016

A team of researchers from the King Abdullah University of Science and Technology (KAUST) of the Kingdom of Saudi Arabia has reported a perovskite-based phosphor-based white light converter with a modulation bandwidth around 40 times higher than common LED phosphors. This result could put an end to today's VLC bottleneck when using white LEDs.

Perovskite-based phosphor white light converter image

By mixing solution-processed CsPbBr3 perovskite nanocrystals (NCs) with a conventional red phosphor, they obtained what they describe as a perovskite-based phosphor white light converter with a modulation bandwidth of 491MHz, which could support high data rate up to 2 Gbit/s, much faster than Wi-Fi. In addition to exhibiting a shorter excited lifetime, the red phosphor and perovskite composite material yields a white light with a high colour rendering index of 89 and a correlated colour temperature of 3236 K, which makes the white LED suitable for comfort lighting applications.

Dyesol secures $1 million grant for perovskite PV research

Aug 26, 2016

Dyesol recently secured a £800,000 ($1.05 million) grant by the U.K.’s Engineering and Physical Sciences Research Council (EPSRC) for the continued research in the optimization of charge carrier mobility in nanoporous metal oxide films and will enable the Australian organic cell developer to better understand the impact of halide modified titania on Perovskite cell performance.

The EPSRC is the U.K.’s main agency for funding research in engineering and the physical sciences, and this grant will be delivered specifically to Dyesol UK, Cristal and the University of York. The grant monies will, Dyesol said, help support better understanding of the chemistry of the improved electron capture and transport technique.

New perovskite book: Hole Conductor Free Perovskite-based Solar Cells

This book discusses perovskite solar cells, with an emphasis on a highly unique perovskite solar cell structure and the special properties of hybrid organic-inorganic perovskites.

The book was written by Lioz Etgar from the Hebrew University in Jerusalem, Israel. Etgar's research group focuses on the development of innovative solar cells.

New insight into perovskite traps may lead to better PVs and sensors

Aug 10, 2016

Researchers at the University of Groningen provided new insight into hybrid perovskite traps - the loss of electric charges that happens in both silicon and perovskite, and reduces the efficiency of photovoltaic cells.

The new insight happened by chance. The researchers placed a perovskite crystal in a vacuum chamber in an attempt to cool it down and while pumping out the air, a laser was left on, that excited the crystal. This laser light produced electronic charges in the crystal, which emitted light when they recombined. In this instance the crystal should have emitted green light, but surprisingly, when the air was removed from around it, the green light disappeared too. However, when the air was let back in again, the light emission was restored. So apparently, without air, most charges disappear into the traps.

2D perovskites may rival graphene in PV applications

Aug 10, 2016

Department of Energy (DoE) funded researchers investigated the electronic properties of 2D hybrid organic-inorganic perovskite sheets, as an alternative to graphene and other materials. The researchers reported that such perovskites could rival graphene in PV applications, since the 2D crystals exhibited efficient photoluminescence, were easier to grow than graphene and it's possible to dope it to make the various varieties of ionic semiconductors needed to beat other 2D materials with tunable electronic/photonic properties.

Scientists created these new forms of hybrid organic-inorganic perovskites in atomically thin 2D sheets and first showed how they hold promise as semiconductor materials for photovoltaic applications. Next they showed how they could serve as an alternative to other 2D semiconductors that are widely studied as potential successors to silicon in future electronic devices.