Addition of biological material boosts performance of perovskite solar cells

An international team of researchers, including ones from Penn State, Columbia University, University of Toledo, Northeastern University in the U.S and Carl von Ossietzky University in Germany, designed next-gen solar cells that mimic photosynthesis with a biological material, by adding the protein bacteriorhodopsin (bR) to perovskite solar cells.

Power conversion efficiency (PCE) distribution of bR-incorporated PSC imagePower conversion efficiency (PCE) distribution of bR-incorporated PSC based on statistics of 15 devices, with average efficiency of 16.34 %. Image from ACS article

“These findings open the door for the development of a cheaper, more environmentally friendly bioperovskite solar cell technology,” said Shashank Priya, associate vice president for research and professor of materials science at Penn State. “In the future, we may essentially replace some expensive chemicals inside solar cells with relatively cheaper natural materials.”

Korea Electric Power Corp. (KEPCO) develops efficient flat-type perovskite solar cell

Korea Electric Power Corp. (KEPCO) recently stated that it has developed a flat-type perovskite solar cell with "the world's best photoelectric conversion efficiency".

KEPRI, an R&D subsidiary of KEPCO, reportedly succeeded in producing perovskite solar cell with 20.4% photoelectric conversion efficiency, surpassing the 20.1% efficiency of flat solar cells announced so far.

Tin-containing perovskite solar cells achieve 30% power conversion

A team of researchers from Stanford University and University of Colorado Boulder, led by Professor Michael McGehee, demonstrated how to dramatically improve the stability of tin-containing perovskite materials used in stacked solar cells, allowing for up to 30% power conversion efficiency.

These stacked perovskite solar cells could be an inexpensive alternative to silicon solar panels that operate at only 20% efficiency. McGehee and his team have been developing perovskite stacking methods for years in an attempt to increase power conversion efficiency.

Chinese researchers develop perovskite solar cells with enhanced stability

A research team led by Prof. GAO Peng from Fujian Institute of Research on the Structure of Matter of the Chinese Academy of Sciences has developed high-performance perovskite solar cells with enhanced environmental stability.

The team reported a 2-(4-fluorophenyl)ethylamine (FPEA: 4-FC6H4C2H4NH3) bulky cation to grow a 2D perovskite overlayer on the top of the Cs/FA/MA triple-cation 3D perovskite to combine the high stability of 2D perovskite with high efficiency of 3D perovskite simultaneously.

New strategy yields 24.8% efficiency all-perovskite solar cells

Researchers at Nanjing University in China and the University of Toronto in Canada have fabricated all-perovskite tandem solar cells (PSCs) with remarkable independently certified PCEs of 24.8% for small-area devices (0.049 cm2) and 22.1% for large-area devices (1.05 cm2).

Fabricating all-perovskite tandem solar cells, based on both wide-bandgap and narrow-bandgap perovskites, could lead to a higher power conversion efficiency (PCEs) than that attained by single-junction cells without increasing fabrication costs. In order to build this new type of solar cell, however, researchers need to find a way to enhance the performance of each subcell, while also integrating the wide-bandgap and narrow-bandgap cells synergistically.