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

Columbia team aims to double perovskite PV efficiency

Sep 26, 2016

A team of scientists at Columbia University has discovered the possibility of greatly boosting the efficiency of hybrid organic inorganic perovskite (HOIP) solar cells.

The team showed how HOIPs have a far lower rate of energy loss than silicon cells, making it possible for the harvesting of excess electronic energy to increase the efficiency of solar cells. The recent Columbia study has actually found that it's possible to make HOIP-based solar cells even more efficient than anyone thought possible.

Imploding bubbles yield perovskites fit for solar cells

Sep 15, 2016

Researchers at Saudi Arabia's King Abdullah University of Science and Technology (KAUST) have shown how imploding bubbles in a solution can grow single crystals of perovskites especially suited for solar applications.

Imploding bubbles for perovskite growth image

The researchers explain that hybrid perovskite materials can easily be fabricated on a large scale from a solvent solution. However, this process typically produces polycrystalline perovskite films that have a smaller solar light conversion efficiency than monocrystalline materials because the boundary between crystalline grains leads to losses. In particular, growth of single-crystalline perovskite solar cell films has not yet been achieved on top of other materials, which is a requirement for practical devices.

Perovskites could push forward quantum computing applications

Sep 05, 2016

Researchers at the Energy Department’s National Renewable Energy Laboratory (NREL) discovered a use for perovskites that could push forward the development of quantum computing.

The discovery, made quite accidentally, occurred while the researchers were investigating excitons in perovskites. The sample was illuminated with a short laser pulse whose wavelength was specifically tuned to avoid being absorbed by the sample. Instead, the exposure triggered a strong interaction of light with the perovskite, producing a shifted transition energy known as the optical Stark effect. The effect occurs in semiconductors, but typically can only be observed at extremely low temperatures in very high-quality, high-cost materials. NREL’s scientists were able to observe the effect quite readily at room temperature in materials grown using solution processing.

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.