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 processing technique to bring perovskite-based LEDs closer to commercialization

Jan 19, 2017

Researchers at Princeton University have developed a technique in which nanoscale perovskite particles self-assemble to produce more efficient, stable and durable perovskite-based LEDs. This advance could speed the use of perovskite technologies in commercial applications such as lighting, lasers and television and computer screens.

Perovskite tecnique for LEDs image

The team explains that this technique allows nanoparticles of perovskite to self-assemble to create ultra-fine grained films, an advance in fabrication that could make perovskite LEDs a viable possibility.

Imperial College team investigates the source of perovskite PVs performance issues

Dec 26, 2016

Scientists at Imperial College London have conducted experiments to follow the direction in which electrons move in perovskite solar cells when they are generated with a short pulse of light. They found that the mobile charged defects are still present even in solar cells with very efficient contact materials, despite these cells showing no hysteresis. Hysteresis was only found when cells suffered the combined effects of both the defects and poor selectivity at the contacts.

Perovskite/CIGS modules reach 17.8% efficiency

perovskite films contain charged defects that tend to impair their performance. Slow movement of these defects is thought to be responsible for a process known as hysteresis, which leads to irregularities in the efficiency with which light is converted to electrical current. Light-generated electricity exits the solar cell in the form of electrons to be harnessed. This is done via ‘contacts’ that sandwich the light-absorbing film. Previously, scientists have managed to address hysteresis by using more ‘selective’ contact materials that ensure a one-way flow of electrons out of the solar cell.

The root of stability challenge in pervoskite PVs may be found in intrinsic process

Dec 25, 2016

Researchers at OIST (Okinawa Institute of Science and Technology) have been investigating the cause of rapid degradation of perovskite solar cells. Their conclusions suggested that the degradation of MAPbI3 perovskites may not be a fixable issue, since iodide-based perovskites produce a gaseous form of iodine, I2, during operation, which in turn causes further degradation of perovskite.

Stability problem of perovskite PVs may be rooted in intrinsic process image

In contrary to many researchers that have pointed to external sources (like moisture, atmospheric oxygen and heat) as the cause of MAPbI3 degradation, the fact that these solar cells continue to degrade even in the absence of these factors led the OIST team to believe that a property intrinsic to these cells was causing the breakdown of material.

New additives improve the stability of perovskite solar cells

Dec 12, 2016

Researchers from the National Institute for Materials Science in Japan have developed new additives for the hole-transporting layer of perovskite solar cells, which aim to greatly improve cell stability. When placed in the dark, the cells did not show signs of deterioration even after 1,000 hours of testing, and under continuous light soaking, they lasted six times longer (in terms of the time it takes for their power conversion efficiencies to fall to 85% of their initial states) compared to cells treated with conventional additives.

New additive improves stability of perovskite PV image

The researchers hope that these results will accelerate the commercialization of perovskite solar cells. The research group directed its focus on a pyridine-based additive, TBP, which is used as an additive in a hole-transporting layer in the mesoporous-type cell structure. After conducting experiments and analyzing the results, the group found that chemical reactions occurring between TBP and perovskite materials were one of the major causes of stability deterioration.

Researchers gain a better understanding of perovskite nano-domains on solar efficiency

Dec 11, 2016

Researchers at the EPFL, along with scientists from Luxembourg Institute of Science and Technology (LIST) have used microscopy with mass spectrometry to study the nanoscale elemental distribution of mixed perovskites, which is particularly relevant for photovoltaic reproducibility and efficiency.

Perovskite are usually deposited as thin films on a surface, and they self-organize into crystals capable of being used for efficient solar cells. Limited information is available about the self-organization of the material, or how the different elements distribute - all of which is vital for optimizing perovskite photovoltaics. This is why the team tried to reveal significant micro- and nanoscale elemental and structural properties in self-organizing mixed perovskite films.

Ultrathin aluminum oxide protective layer adds stability to perovskite solar cells

Dec 07, 2016

Researchers at Eindhoven University of Technology (TU/e) and research institute ECN (part of the Solliance collective) have found that adding a thin layer of aluminum oxide helps protect a perovskite solar cell against humidity, as well as add a yield boost of 3%.

The scientists covered the sensitive layer of perovskite with a few atomic layers of aluminum oxide to protect against degradation caused by humidity. These layers are contained within the solar cell, between the layers of perovskite and electric contact. The researchers chose aluminum oxide (Al2O3) since it can form immediately on any kind of surface. The team explained that despite the fact that Al2O3 has electrically insulating properties, it can still be used as a buffer layer between the semi-conductive perovskite and the conductive contacts by limiting the thickness of the layer to one nanometer or less. This way, charge carriers can then tunnel electrically through the insulator layer.