(Nanowerk Spotlight)
Lightweight and flexible perovskite solar cells are a new technology in which photovoltaic cells are manufactured using roll-to-roll printing and coating methods to deposit all the functional materials such as perovskites on flexible plastic substrates. The ability to print them simply like printing newspapers also offers significant cost benefits.
Usually, the top electrode of a perovskite solar cell (PSC) is deposited using complex high vacuum-based metal evaporation techniques. Typically, this evaporated metal layer is either gold or silver and thus is the most expensive component of the device.
A team of researchers from Australia’s national science agency CSIRO and Monash University has been able to successfully replace this expensive metal layer with a less-expensive carbon-based electrode that can also be applied using roll-to-roll techniques. They report their findings in Advanced Energy Materials ("Vacuum-Free and Solvent-Free Deposition of Electrodes for Roll-to-Roll Fabricated Perovskite Solar Cells").
This new electrode deposition method involves the deposition of carbon and silver on a detachable plastic (PET) substrate first, with the dried electrode then pressed onto the top of the perovskite solar
cell. The PET layer is then removed and can be reused.(Nanowerk Spotlight) Lightweight and flexible perovskite solar cells are a new technology in which photovoltaic cells are manufactured using roll-to-roll printing and coating methods to deposit all the functional materials such as perovskites on flexible plastic substrates. The ability to print them simply like printing newspapers also offers significant cost benefits.
Usually, the top electrode of a perovskite solar cell (PSC) is deposited using complex high vacuum-based metal evaporation techniques. Typically, this evaporated metal layer is either gold or silver and thus is the most expensive component of the device.
A team of researchers from Australia’s national science agency CSIRO and Monash University has been able to successfully replace this expensive metal layer with a less-expensive carbon-based electrode that can also be applied using roll-to-roll techniques.They report their findings in Advanced Energy Materials ("Vacuum-Free and Solvent-Free Deposition of Electrodes for Roll-to-Roll Fabricated Perovskite Solar Cells").
This new electrode deposition method involves the deposition of carbon and silver on a detachable plastic (PET) substrate first, with the dried electrode then pressed onto
the top of the perovskite solar cell. The PET layer is then removed and can be reused.
Flow-chart illustrating fabrication steps of the flexible printed electrodes: a) coating of Ag paste onto nonstick side of release layer, b) drying of the Ag coating, c) coating of carbon-based paste onto dried Ag layer, d) drying of the carbon-based coating, e) dry press deposition of printed bilayer electrode to the roll-to-roll- fabricated PSC precursor stack (up to the hole-transport layer) in a calendar press, and f) photo of the complete PSC device. (Post Reprinted awaiting permission from Wiley-VCH Verlag)
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