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Rust update april 2021
Rust update april 2021







rust update april 2021 rust update april 2021 rust update april 2021

"Roughly speaking, this means that only part of the energy of the light absorbed by haematite generates mobile charge carriers, the rest generates rather localised excited states and is thus lost," Grave explains. The group at Technion investigated how the wavelength of absorbed light in hematite thin films affects the photoelectrochemical properties, while the HZB team determined the wavelength dependent charge carrier properties in thin films of rust with time-resolved microwave measurements.īy combining their results, the researchers succeeded in extracting a fundamental physical property of the material that had generally been neglected when considering inorganic solar absorbers: The photogeneration yield spectrum. Avner Rothschild (Technion) has provided an explanation as to why haematite falls so far short of the calculated maximum value. Daniel Grave (Ben Gurion University), Dr. In a recent study published in Nature Materials, however, a team led by Dr. What exactly has been overlooked? What is the reason that only modest increases in efficiency have been achieved? Scientists have puzzled over this for a long time. By comparison, the photocurrent efficiency of the semiconductor material silicon, which now dominates almost 90% of the photovoltaic market, is about 90% of the theoretical maximum value. Although research on haematite photoanodes has been going on for about 50 years, the photocurrent conversion efficiency is less than 50% of the theoretical maximum value. Haematite is stable in water, extremely inexpensive and well suited as a photoanode with a demonstrated catalytic activity for oxygen evolution. Research has long focused on haematite (α-Fe 2O 3), which is widely known as rust.









Rust update april 2021