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Research Focus / Research Objectives

The research group "Physics of Solar Energy Conversion," led by Prof. Goldschmidt, investigates the fundamental physical processes involved in converting solar energy into electrical energy using solar cells. The aim is to leverage this understanding to develop conceptually new solar cell structures and improve existing technologies. The group's work encompasses the fabrication, characterization, and modeling of perovskite-based solar cells.

The Potential of Perovskites in Photovoltaics

Perovskites are highly attractive for photovoltaics for several reasons. Their high absorption capacity allows for nearly complete sunlight absorption even with thin layers. Their tolerance to crystal defects enables the use of simpler manufacturing processes compared to other semiconductor technologies. Low material consumption combined with these simple processes results in low production costs.

However, several challenges must be addressed for the widespread application of perovskites in photovoltaics. Long-term stability must be ensured for over 25 years, and high efficiencies need to be achieved with materials and processes that are sustainable at a terawatt-scale photovoltaic industry. These materials must also avoid environmental issues such as toxicity. Overcoming these challenges requires a deep understanding of the physical processes within perovskites and at the interfaces of the solar cells.

Current Research Areas

The group's current research focuses on:

(i) High-efficiency perovskite-based tandem solar cells,
(ii) Graphite-based perovskite solar cells, and
(iii) Analyses of the potentials, cost structures, and sustainability aspects of photovoltaics.

Perovskite-based tandem solar cells offer the potential for exceptionally low costs and resource consumption due to their high efficiency combined with minimal material usage. Graphite-based solar cells, on the other hand, promise superior stability, making them particularly attractive for long-term applications.