Tandem Seminar – Materials for Solar Energy
It’s time for this year's second Tandem Webinar held by Chalmers Area of Advance Materials Science. When: 26 March 2021, at noon (12 am). Place: Online.
In this webinar we will have two presentations dedicated to materials for solar energy conversion, specifically how we can manipulate the solar spectrum to make better use of it, will be covered.
The webinar is held on the platform zoom. To login and participate, click on the following link:
- Noon, at 12:00. The webinar starts. Moderator: Professor Leif Asp, Co-director Area of Advance Materials Science
- Developing solid-state photon upconverters based on sensitized triplet–triplet annihilation, Angelo Munguzzi, Associate Professor - Università Degli Studi Milano Bicocca - Materials Science Department.
- Toward solid state singlet fission: Insights from studies of Diphenylisobenzofuran−Semiconductors and Pentacene-decorated gels, Maria Abrahamsson, Professor of Physical Chemistry at the Department of Chemistry and Chemical Engineering at Chalmers University of Technology.
Developing solid-state photon upconverters based on sensitized triplet–triplet annihilation.
The conversion of low-energy light into photons of higher energy based on sensitized triplet–triplet annihilation (sTTA) upconversion in bicomponent systems is emerging as the most promising wavelength-shifting methodology to recover sub-bandgap solar photons, because it operates efficiently at excitation powers as low as the solar irradiance. Excellent efficiencies have been obtained in liquid environments as well as in prototype upconversion enhanced solar cells, but the research is still focused on the realization of affordable solid states upconverters suitable to be implemented in current solar technologies. We show here that controlled confinement of the upconverting materials in nanostructured or nanosized materials can improve the material performance at low powers. The result presented will show demonstrate how this strategy can represent a crucial guideline for the future development of upconverting photonic devices operating at subsolar irradiances suitable for technological implementation.
Angelo Monguzzi is Associate Professor in Condensed Matter Physics at Department of Materials Science of the University Milano-Bicocca. His research is focused on the development of advanced organic and hybrid functional nanomaterials for applications in molecular photonics, photon management and bio-imaging. The main line of his current research is the development of advanced materials for photon managing application aimed to enhance the performance of the current solar technologies.
Toward solid state singlet fission: Insights from studies of Diphenylisobenzofuran−Semiconductors and Pentacene-decorated gels.
Singlet fission has emerged as a promising way to overcome the Shockley−Queisser limit in solar energy conversion applications, and a few studies have claimed proof-of-principle results. Singlet fission relies on precise geometric organization of chromophores, which can be hard to achieve in the desirable solid-state materials. Here, two different self-assembly approaches will be described and the insights we gained from detailed spectroscopic studies will be discussed. We demonstrate that both the environment and the nature of the semiconductor substrates can have large impact on the efficiency and that care must be taken when designing new materials.
Maria Abrahamsson is Professor of Physical Chemistry at the Department of Chemistry and Chemical Engineering at Chalmers University of Technology. She is also the director of the Materials Science Area of Advance Chalmers University of Technology. Her research interests are centered around light matter interactions and electron and energy transfer in molecules and materials that can be used for conversion of solar energy into fuels as well as electricity. She is also chair of the Gothenburg branch of the Swedish Chemical Society.
Seminarium; Öppen föreläsning