Scientists from the Korea Institute of Science and Technology (Kist) have used a dielectric additive in organic photovoltaic manufacture to produce uniform films in environmental humidity between 10% and 70%. The researchers said the approach improves process stability for organic solar cells.
Researchers from the Korea Institute of Science and Technology Have a new dielectric additive based coating technology developed for organic photovoltaic.
The team discovered that their adaptation makes it possible for organic photovoltaisches to be reliably manufactured, regardless of changes in the seasonal feelings, causing the sensitivity to the humidity that is traditionally displayed during organic PV production.
The work of the researchers included the introduction of a cheap dielectric additive, carvone (CV), in the photoactive low solution. The CV formed a non-Covalent complex with the organic Acceptor material (L8-Bo) This improved the formation of uniform crystallites of acceptors and exciton dissociation in D18: N3: L8-BO mixture.
The addition of CV also caused strong inside in Marangoni flows during mescoating, the researchers explained, making them possible Homogeneous morphology over large areas. The Marangoni effect consists of a current driven by local differences in interface voltage caused by temperature or concentration radients.
Through the adjustment, the researchers were able to make uniform photoactive films under relative humidity of the environment from 10% to 70%.
Under tests, Groot-area reached organic photovoltaic cells with the CV-based process a force Conversion -efficiency of 16.27% on a module of 20.33 cm2 in size. The researchers claim that this is one of the highest efficiency that is achieved in organic solar modules above 20 cm2 and compares with an efficiency of 15.1% for a cell manufactured under conventional methods.
The researchers calculated a variation in efficiency over seasons within ± 2%, lower than the typical deviation that is observed in commercial solar panels. They said their adjustment also yields cost benefits by removing the need for Precious dry room facilities, with manufacturers who can mix the additive in existing coating solutions and use current equipment without adjustment.
Hae Jung son, leader of the research, noted that the technology “offers a scalable path to cheap, stable and powerful production of solar energy.”
“We are now expanding this approach from Tandem Zonnemodules and are looking for cooperation with industrial and global research partners,” Son added.
The corresponding research paper, “”Dielectric additive makes moisture-independent preparation of mixing morphology possible for powerful, large photo photo-photovoltaic with large performance“Is available in the diary Joule.
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