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

Researchers develop perovskite-based solar cells that are more efficient when heated

May 18, 2016

A team of scientists from Israel, Singapore, and Switzerland has reported a major advance in the physics of perovskite solar cells — by producing high-performance cells whose efficiency surprisingly improved as the cells heated up, in contrary to the usual drop in efficiency that occurs upon heating of a solar cell.

The researchers used experiments that varied the intensity of light and cell temperature, helping to better understand the molecular mechanisms that allow these solar cells to discharge high voltage while maintaining high current density and low internal resistance, which are essential for their superior performance. The study suggests deploying perovskite solar cells under concentrated sunlight in order to realize even higher efficiency—one of the next tasks in their planned experimental studies.

RRAM-Info, a new Metalgrass knowledge hub

May 11, 2016

We are happy to announce a new Metalgrass knowledge hub, RRAM-Info.com, that focuses on RRAM, or Resistive RAM technology. RRAM is a promising next-generation storage-memory candidate, based on memristors - materials that change their resistance.

RRAM-Info will bring you daily news, commentary and updates about RRAM memory technologies. You can subscribe to our weekly RRAM newsletter here - and if you have not done so already, be sure to also subscribe to the free perovskite newsletter!

Solliance announces an up-scaled perovskite-based PV module with 10% efficiency

May 09, 2016

Solliance announced a 10% aperture area power conversion efficiency for its up-scaled thin-film perovskite photovoltaic modules. The efficiency was measured on an aperture area of 168 cm2. Twenty-five cells were serial connected through an optimized P1, P2, P3 interconnection technology. The PV module was realized on a 6x6 inch glass substrate using industrial scale-able slot die coating in combination with laser patterning.

Solliance 168cm2 10% perovskite cell (May 2016)

Based on previous optimization on 16 cm2 modules, the Solliance team was able to transfer this to a 6x6 inch sized glass substrate using the developed blade coating process and the optimized mechanical patterning technology. These results demonstrate the up-scalability of this new thin film PV technology. Apart from the electrodes currently used, all layers can be processed in ambient environment and at temperatures below 120⁰C. Furthermore, the deposition and interconnection technologies used for obtaining these results are industrially available for Sheet-to-Sheet as well as for Roll-to-Roll manufacturing. The latter allows for creating high volume production in the future.

UK researchers reach pessimistic conclusions regarding perovskites' use in future solar cells

May 08, 2016

Researchers at University College London, UK, have reassessed the validity of the 'tolerance factor' (a decades-old indicator for the stability and distortion of crystal structures), used in predicting new hybrid perovskite structures. The results of their work may cast shadows on the optimism that surrounds perovskites' future uses.

Recent studies out of Cambridge University showed that the tolerance factor approach worked well at assigning radii to organic ions in a wide range of hybrid perovskites. They suggested that there could be more than 600 undiscovered hybrid perovskites. The UCL team was interested in whether the tolerance factor approach was still valid for halide perovskites suitable for solar cells. The chemical properties of the heavy iodide anions in these structures are very different to the hard atomic spheres assumed in tolerance factor calculations. The results suggested that ‘the tolerance factor simply doesn’t work for iodide perovskites.’

Flipping a chemical switch may result in more stable perovskite solar cells

May 01, 2016

Researchers from Brown University, the National Renewable Energy Laboratory (NREL) and the Chinese Academy of Sciences' Qingdao Institute of Bioenergy and Bioprocess Technology came up with a way of "flipping a chemical switch" that converts one type of perovskite into another - a type that has better thermal stability and is a better light absorber. This achievement could be one more step toward bringing perovskite solar cells to the mass market.

Flipping a chemical switch turns one perovskite to another image

The researchers demonstrated their new technique for making solar cells that can be more stable at moderate temperatures than the perovskite solar cells that are currently being developed; The technique is said to be simple and has the potential to be scaled up.

ORNL team tracks how halogen atoms effect pervoskite synthesis

Apr 18, 2016

Researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) have found a potential way to further improve solar cell efficiency by understanding the competition among halogen atoms during the synthesis of sunlight-absorbing crystals.

ORNL team studies how halogen atoms effect perovskite growth image

Using high-powered imaging techniques, the team tracked kinetic activity in organometallic halide perovskites. Halogen ions, competing for a position in the growing structure, affect the movement of charges through the crystals and subsequently impact the efficiency of sunlight’s conversion to electricity.

Applying pressure may improve perovskite solar-cell absorbers

Apr 18, 2016

Stanford University scientists have found that applying pressure can change the properties of perovskites and the way they respond to light. The results of their study suggest that it is possible to increase the voltages of perovskite solar cells by applying external pressure. The researchers also observed a dramatic increase in the electronic conductivity of these materials at high pressures.

Squeezing perovskites may improve solar cell image

To understand exactly how perovskites behave under pressure, the scientists placed the crystals in a vice between two diamonds. As the diamonds were squeezed closer together, the perovskite samples changed color. These lab results indicate that perovskites can absorb high or low energy light waves, depending on the precise amount of pressure that is applied.