Tag

Photovoltaics

All articles tagged with #photovoltaics

physics-and-mathematics20 days ago•67 min saved

Molecular vibrations act as a 'catapult' for ultrafast electron transfer in organic solar cells

Researchers show ultrafast charge transfer at a donor–acceptor junction in an organic solar cell, where vibrations of the donor polymer launch an electron across the junction in about 18 femtoseconds. This vibronic mechanism acts like a molecular catapult, enabling faster, more coherent charge transfer than thought possible and suggesting new design strategies that exploit, rather than suppress, molecular motion to improve organic solar cell efficiency.

via Live Science|

#electron #exciton #photovoltaics

energy7 months ago•3 min saved

Early 90s Solar Panels Remain 80% Efficient After 30 Years, Boosting Energy Outlook

A study shows that solar panels installed in Switzerland between 1987 and 1993 still produce over 80% of their original power after 30 years, demonstrating exceptional durability and longevity, especially in alpine environments. This challenges assumptions about the lifespan of solar technology and highlights the importance of robust materials for sustainable energy future, emphasizing that durability can be as crucial as cost and efficiency.

via ZME Science|

#climate-impact #energy #longevity

science-and-technology2 years ago•13 min saved

"Enhancing Perovskite Solar Cells with Ytterbium Oxide Buffer"

Researchers have developed a multifunctional ytterbium oxide buffer layer for perovskite solar cells, which enhances their stability and efficiency. The buffer layer effectively passivates defects, reduces non-radiative recombination, and minimizes lead leakage, addressing key challenges in perovskite solar cell technology. This advancement holds promise for the commercialization of perovskite solar cells and contributes to the ongoing efforts to improve their long-term stability and performance.

via Nature.com|

#perovskite #photovoltaics #science-and-technology

science-and-technology3 years ago•3 min saved

"Photon Splitting: From One to Four Charge Carriers"

Researchers have recorded an ultrafast movie of the photon-to-electricity conversion process in pentacene, a molecular material that shows conversion of one photon into four charges, instead of the usual two. This excitation doubling, called exciton fission, could be extremely useful for high-efficiency photovoltaics. The researchers used time- and angle-resolved photoemission spectroscopy to observe the dynamics of electrons on the femtosecond time scale, which is a billionth of a millionth of a second, and captured images of the fleeting excited electrons for the first time. They identified the mechanism of the free charge carrier-doubling process, which is crucial for the use of organic semiconductors in innovative photovoltaic applications and to further boost the conversion efficiency of today's solar-cells.

via Phys.org|

#charge-carriers #exciton-fission #organic-semiconductors