Nanjing University

Revolutionary solar breakthrough: 24.5% efficiency achieved by Nanjing University, University of Victoria, and Australian National University researchers using lead-tin perovskite technology.

Researchers have developed an all-perovskite tandem solar cell with a power conversion efficiency of 28.5%, open-circuit voltage of 2.112 V, and stabilized efficiency of 28.0%. Teams from Nanjing University, University of Science and Technology of China and Chinese Academy of Sciences (CAS) were involved.

All-perovskite tandem solar cells, stacks of p-n junctions developed from perovskites with different energy bandgaps, have the potential of achieving greater efficiencies than conventional single-junction solar cells. Up until now, nevertheless, a lot of proposed all-perovskite tandem cells have actually not achieved the preferred power conversion performances (PCEs), usually because of difficulties associated with developing ideal narrow- and wide-bandgap subcells.

Organic photovoltaics (OPVs), solar technologies based on organic semiconductors, have actually revealed excellent promise both for the scalable provision of clean energy and also for the development of solar-powered wearable electronics. Regardless of their benefits, organic solar cells suffer from the so-called recombination loss, a loss of photocurrent resulting from the recombination of photocarriers.

Metal halide perovskite solar cells have actually drawn in substantial focus as their power conversion performances (PCEs) remained to increase from below 4% to over 25%.

Lightweight as well as flexible perovskites are very encouraging materials for the fabrication of photovoltaics. Thus far, nevertheless, their highest reported efficiencies have actually been around 20%, which is significantly lower than those of stiff perovskites (25.7%).

The power conversion performance (PCE) of single-junction perovskite solar cells (PSCs) has actually increased remarkably from 3.8% to 25.2% in simply a decade. As the quick development of PCE has been approaching the limit of its academic performance, making tandem solar cells by incorporating subcells with different bandgaps offers an avenue to surpass the Shockley-Queisser restrictions of single-junction solar cells.

Hybrid organic-inorganic perovskites have garnered significant interest in the solar cell community in light of their excellent optoelectronic properties and low manufacturing cost. Meanwhile, in efforts to produce perovskite solar cells (PSCs) with yet higher efficiencies, considerable steps have been made in developing monolithic tandem solar cells.