In the last decade, perovskite solar cells (PSCs) have emerged as a low-cost, thin-film technology with unprecedented efficiency gains from 3.8% in 2009 to
25.7% in 2022. Perovskites can be processed from inexpensive solution-based methods and have exceptional material properties that are comparable to
established GaAs or Si. The combination of high-quality semiconductors with low-cost deposition techniques are an attractive match creating great excitement
and anticipation far beyond academia because PSCs may have the potential to outcompete established thin-film technologies or can be combined with them
for further performance enhancements. Although progress has been related mostly to the short-term performance of devices, initially little attention was paid so
far to their long-term implications. With a current photovoltaic conversion efficiency compatible with commercialization, long-term stability and up-scaling are
receiving more and more attention.
In the past 2 years, there has been a push to understand further the mechanisms that drive stability in perovskite materials, with rapid progress towards stable
devices in the long-term. This symposium explores fundamental questions and challenges, focusing on the material’s properties that make perovskites so
remarkable, and the current understanding of the device physics, including the raising of lead-free alternatives with a fast growth in the last few years. One
main driver were novel synthesis and characterization methods having established a distinct direction within the research community now. The outstanding
properties of halide perovskites have not just been successfully applied in solar cells but also in a wide range of optoelectronic devices, such as light-emitting
devices, lasers, memristors or detectors. The scope beyond photovoltaics will thus be one main focus of the symposium.
Finally, there is a designated session on the progress of long-term stability, and the evolution towards modules, in order to provide an outlook on how close
PSCs are to commercialization.
Institute for Photovoltaics
Universitat Jaume I
Lawrence Berkeley National Laboratory
Chemical Sciences Division
Yuanyuan Alvin Zhou
Hong Kong Baptist University