24 décembre 2021

[Photovoltaic] – A universal intercalation strategy for highly stable perovskite photovoltaics.

Accueil > Actualités > [Photovoltaic] – A universal intercalation strategy for highly stable perovskite photovoltaics.
Flèche contenu
Perovskite photovoltaic - codex international

A team of scientists led by the Nanomaterials Research Institute at Kanazawa University have demonstrated that the stability and efficiency of certain solar panels can be greatly enhanced by using cesium iodide (CsI) intercalation technology.

Solar panels have the potential to be an abundant and clean source of energy. In particular, photovoltaic cells with the perovskite crystal structure, named after the mineral with the same atomic configuration, have many attractive features. Their strong optical absorption and high charge mobilities lead to low cost of manufacture and high energy output.

However, deployment by consumers of perovskite solar cells has been hampered by the limited robustness of these cells, because their structure can decompose after exposure to moisture, light, or heat. New formulations that increase the lifetime of perovskite solar cells are thus needed to instill consumer confidence before people start installing perovskite-based solar panels on their roofs.

Now, a team of scientists headed by Kanazawa University has discovered that adding CsI to the commonly used MAPbI3 perovskite structure greatly increases the stability of the resulting devices. The Cs atoms migrate and become “intercalated” into the crystal lattice, and the improved devices showed power conversion efficiencies as high as 18.43%.

Using scanning electron microscopy, the scientists verified that the size of the crystal grains inside the material also increased from 300 to 700 nm due to the addition of CsI. They hypothesize that the intercalation of cesium reduces the spacing between the atomic planes, so that moisture from the air cannot intrude as easily. Also, the surfaces become smoother, which allows charges to reach the electrodes.

“Our approach allowed us to produce layers with precise control over the CsI intercalation,” corresponding author Tetsuya Taima says.

Découvrez aussi
[Nanotechnology] – Nanomaterials to boost the body’s natural defenses 12 novembre 2019

When a person gets sick, the invading virus or bacteria often triggers an immune response, sending a wave of white blood cells to attack the source of the illness. While the body’s natural defenses can often dismantle the infection, the immune reaction can sometimes cause more harm than intended.

Lire la suite
[Nanotechnology] – Using In Situ Liquid TEM to Characterize the Size, Shape and Composition of Nanomaterials 12 novembre 2019

Nanoparticle-based materials are frequently utilized in a variety of applications such as drug delivery, energy production, and catalysis. The shape, composition, and size of nanoparticles has a significant influence on their performance, so producing controllable manufacturing systems is crucial to the commercialization of the latest nanomaterials.

Lire la suite