Perovskites and graphene

Perovskites are materials that share a crystal structure similar to the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3).

Depending on which atoms/molecules are used in the structure, perovskites can possess an impressive array of interesting properties including superconductivity, ferroelectricity, charge ordering, spin dependent transport and much more. Perovskites therefore hold exciting opportunities for physicists, chemists and material scientists.

Graphene is a one-atom-thick layer of carbon atoms arranged in a hexagonal lattice. It is the building-block of Graphite (which is used, among others things, in pencil tips), but graphene is a remarkable substance on its own - with a multitude of astonishing properties which repeatedly earn it the title “wonder material”. Graphene is the thinnest material known to man at one atom thick, and also incredibly strong - about 200 times stronger than steel. On top of that, graphene is an excellent conductor of heat and electricity and has interesting light absorption abilities. These varied properties make it a promising and highly researched material, with hopes of incorporating it in many applications: from inks and composite materials, through sensors, solar cells and water filters, to batteries and supercapacitors.

Due to their unique properties, carbon-based nanomaterials have been the center of extensive research efforts in various fields, one of which is the field of photovoltaic energy conversion. In recent years, hybrid metalorganic halide perovskites have become one of the most promising materials for third generation solar cells, with efficiencies that are constantly on the rise.

The incorporation of graphene into perovskite-based solar cells was naturally proposed, and significant work is taking place on this matter. Graphene-based perovskite solar cells are studied in many ways, including hole and electron transport media (HTM and ETM), electrodes, and various approaches aiming at improving the stability of the device. Tandem architectures based on graphene interlayers are also of great interest.

In addition to solar cells, other areas of graphene and perovskite integration include sensors and photodetectors, QDs, nanocatalysts and more.



The latest Perovskite Graphene news:

Researchers design graphene oxide/silicon heterojunction solar cell with 18.8% efficiency

Researchers from Hebei University, Karlsruhe Institute of Technology and Chinese module manufacturer Yingli Green Energy Holding Co. Ltd. have reported a heterojunction solar cell based on graphene-oxide (GO) and silicon with a large area of 5.5 cm2.

GO is a compound of carbon, oxygen and hydrogen that is obtained by treating graphite with oxidizers and acids. It consists of a single-layer sheet of graphite oxide that is commonly used to produce graphene-related nanomaterials for various applications, including electronics, optics, chemistry and more. The scientists developed an ink made of GO mixed with Nafion, that can be spin-coated on an n-type silicon wafer to form a high-quality passivating contact scheme. “Low interface recombination is provided by the Nafion and carrier selection by the GO,” the team explained, noting that the passivation scheme also includes an electron-selective passivation contact comprising n-doped hydrogenated amorphous silicon with an indium tin oxide (ITO) overlayer aimed at improving light trapping and reducing surface recombination.

Read the full story Posted: Jul 28,2022

Researchers integrate large-area graphene-perovskite solar panels into stand-alone solar farm

An international research group, including teams from CHOSE at the University of Rome Tor Vergata, Hellenic Mediterranean University in Greece and others, has developed a large-area perovskite solar panel with graphene-doped electron transporting layers (ETLs) and functionalized molybdenum disulfide (fMoS2) buffer layers inserted between the perovskite layer and the hole transporting layer (HTL).

Nine GRAPE panels integrated in a stand-alone solar farm-powered infrastructure installed in Crete

The team reported that with increasing temperatures, the module exhibited a smaller drop in open-circuit voltage than commercially available crystalline silicon panels.

Read the full story Posted: Jun 23,2022

Researchers demonstrate how graphene can improve perovskite solar cells

Recent research has shown that the incorporation of graphene-related materials improves the performance and stability of perovskite solar cells. Graphene is hydrophobic, which can enhance several properties of perovskite solar cells. Firstly, it can enhance stability and the passivation of electron traps at the perovskite's crystalline domain interfaces. Graphene can also provide better energy level alignment, leading to more efficient devices.

Improving Solar Cells with Pristine Graphene on Lead Iodide Films image

In a recent study, Spain-based scientists used pristine graphene to improve the properties of MAPbI3, a popular perovskite material. Pristine graphene was combined with the metal halide perovskite to form the active layer of the solar cells. By analyzing the resulting graphene/perovskite material, it was observed that an average efficiency value of 15% under high-stress conditions was achieved when the optimal amount of graphene was used.

Read the full story Posted: Nov 25,2021

Metalgrass offers a discounted yearly market reports package

Metalgrass (Perovskite-Info) is now offering a new subscription service for enterprises that want access to our complete collection of market reports.

Metalgrass market reports package subscription - photo

For $3,500 per year, you will get an Enterprise License to all of our market reports. Metalgrass currently offers 12 market reports, plus 4 handbook guides, and all of these are included in the subscription (bought separately, these will cost over $10,000!). You will also have access to all new reports, updates and guides released in the future (during the yearly subscription period).

Our Enterprise License gives access to your entire organization: you can share the report with all the company employees via mail, shared server or any other digital way.

Read the full story Posted: Oct 21,2021

Graphene Flagship's GRAPES project to promote graphene-enabled perovskite solar panels

The Graphene Flagship, a $1 billion European graphene initiative, has launched a new Spearhead Project called GRAPES, that aims to make cost-effective, stable graphene-enabled perovskite solar panels.

The project will set out to play an essential role in improving Europe's uptake of solar energy projects by improving the stability and efficiency of this technology when deployed on a large scale. As a European Commission funded project, the Graphene Flagship GRAPES initiative has been established to help Europe meet its ambitious sustainability goals.

Read the full story Posted: May 11,2021

A new method overcomes the drawback of perovskite grain boundaries by using 2D materials for conducting hole currents

A team of scientists, led by Professor Feng Yan from Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, and co-workers, recentky developed a novel method to overcome the drawback of grain boundaries (GBs) in perovskites without using defect passivation.

Several 2D materials, including black phosphorus (BP), MoS2 and graphene oxide (GO), were specifically modified on the edge of perovskite GBs by a solution process. The 2D materials have high carrier mobilities, ultrathin thicknesses and smooth surfaces without dangling bonds. The PCEs of the devices are substantially enhanced by the 2D flakes, in which BP flakes can induce the highest relative enhancement of about 15%.

Read the full story Posted: Apr 03,2021

Researchers reach excellent results on air processed methylammonium free PSCs via scalable technique

A research team, led by Dr. Luigi Angelo Castriotta at the at University of Rome Tor Vergata's CHOSE Center for Hybrid and Organic Solar Energy, has reported impressive results on methylammonium free perovskites processed in air, using a scalable technique based on infrared annealing and potassium doped graphene oxide as an interlayer.

The team reached efficiencies of 18.3% and 16.10% on 0.1cm2 cell and on 16cm2 module respectively, with enhanced stability compares to the standard multi cation reference.

Read the full story Posted: Mar 08,2021

Researchers design novel X-ray photodetectors based on perovskites on top of graphene

A team of scientists,  led by László Forró from the School of Basic Sciences at the Ecole Polytechnique Federale de Lausanne (EPFL) in Switzerland, has developed a new X-Ray Photodetector based on perovskites and graphene.

Using 3D aerosol jet-printing technology, the team designed a new technique for creating highly efficient x-ray photodetectors that can be easily added to standard microelectronic circuits, creating more powerful medical imaging devices that can deliver better scan qualities.

Read the full story Posted: Feb 18,2021

Graphene-perovskite solar farm trial up and running in Greece

An experimental graphene-based perovskite solar farm has been operating in Greece for several months, and early results are said to be very promising when it comes to power output and efficiency.

Graphene-enabled perovskite solar farm trial up and running image

Located at the Hellenic Mediterranean University in Crete and spearheaded by the EU's Graphene Flagship, the new solar farm consists of nine graphene'perovskite panels with a total area of 4.5m2 and a total output of approximately 261 watt-peak (Wp).

Read the full story Posted: Oct 02,2020

Novel graphene-based encapsulation opens door to robust perovskite solar cells

Researchers at Pusan National University, Gwangju Institute of Science and Technology and the Korea Institute of Machinery & Materials (KIMM) in South Korea have tackled perovskite solar cells' stability issues by designing a graphene-based encapsulation technique.

Roll-transferred graphene encapsulant for robust perovskite solar cells image

The team introduced a highly flexible and stable graphene encapsulant by adopting the dry transfer method based on a roll-based process.

Read the full story Posted: Jul 27,2020