Modifying the molecules of conventional industrial dyes, chemists created a self-organizing material, which will increase the efficiency of solar cells up to 44%.
Sunlight is a universal energy source, but modern methods for its collection are ineffective, since only 33% of photons into electricity are capable of transforming.
During the experiments, researchers combined various options for two frequently used industrial dyes — diketopyrrolopyrrol (DPP) and Rylen. As a result, they received six species of self-organizing nanomaterial, each of which has minor differences in geometry affecting the process of its excitation, the occurrence of singlet division, as well as the exit and the lifetime of electrons suitable for collecting.
The material exhibits the properties of self-organization, so its molecules are folded in a certain way. As a result, dyes, absorbing photons, are able to combine and exchange energy. Next, the excited electrons in them are separated and they can be collected, in fact converting light into electricity.
The illustration shows the process of combining DPP molecules and a rhenium dye into a self-organizing superstructure.
According to scientists, the ability to self-assemble will reduce the time to create commercially sustainable solar cells and will make them more accessible than existing options, the manufacture of which is based on the long-term molecular synthesis process.
Further, the research team from the Center for Advanced Scientific Research of the University of New York will be engaged in the development of charge collection methods generated by the material synthesized. In case of success, they will be able to initiate the process of singlet division and contribute to the transfer of charge into the solar cell.
Scientists also work on improving performance electronic devices. Previously we reported that