https://phys.org/news/2022-09-materials ... cells.html
by Kaunas University of Technology
A group of chemists from Kaunas University of Technology in Lithuania, the developers of numerous breakthrough innovations in the solar energy field, proposed yet another solution to increase the stability and performance of perovskite solar elements. They synthesized a new class of carbazole-based cross-linkable materials, which are resistant to various environmental effects, including strong solvents used in the production of solar cells.
When applied as hole transporting layers, the new materials helped achieve the 16.9% efficiency of the inverted-architecture perovskite cells at the first attempt. It is expected to reach higher efficiency upon optimization.
New materials thermally polymerized to provide resistance
Organic-inorganic hybrid perovskite solar cells have been attracting worldwide attention as a competitive alternative to conventional silicon-based solar technologies. They are cheaper, more flexible and have higher power conversion efficiency. Scientists all over the world are working to solve challenges related to improving the stability and other features of the perovskite solar elements. These layered, new generation solar cells can have two architectonic structures—regular (n-i-p) and inverted (p-i-n) structures. In the latter, the hole transporting materials are deposited under the perovskite absorber layer.