Purdue researchers have created a transparent polymer film that also conducts electricity, introducing an inexpensive organic material for applications such as the screens of electronic devices.
While some polymers can already conduct electricity with the help of a process called chemical doping, none have yet been made that conduct just as well in a transparent form. This combination could find use in TV, phone and computer screens that currently use a relatively expensive inorganic material, indium tin oxide, to serve as a transparent conductor. The researchers detail their discovery in a paper published on March 23 in Science.
“The precursors of this new polymer are made on the ton scale,” said Bryan Boudouris, the Robert and Sally Weist Associate Professor of Chemical Engineering. “Having a conducting transparent material from carbon-based materials would be significant.”
The polymer film, which has the look and feel of glass, can be more cheaply produced on a large scale than indium tin oxide because it originates from earth-abundant materials. Its cost effectiveness also has advantages over polymers already used for electronics that rely on expensive chemistry and chemical doping to achieve high conductivity. Existing conducting polymers also typically absorb light due to their conjugated, or delocalized, electron network structure.
“It’s tough to engineer something that is conjugated to be transparent,” said Brett Savoie, an assistant professor of Chemical Engineering. “So, we started with a completely new non-conjugated polymer and modified it to conduct.”
Modifications involved adding radical groups that are already transparent but typically wouldn’t conduct electricity within a polymer. “Our idea was, could we use polymers easier to make on a large scale but also get them to be electronically active?” Boudouris said.
Savoie simulated how the radical groups electronically communicate with each other across the polymeric material, a property known as electrical percolation, to figure out how to make the polymer a good conductor. The simulations showed that it was critical to incorporate more radicals than previous studies had been able to achieve, and also make the polymer soft enough that the radical groups could associate within the material. Boudouris accomplished this by synthesizing a material that had both a high density of radical sites and could flow at low temperatures, resulting in a transparent film processed near room temperature.
This polymer is not only transparent, but could conduct electricity competitively with commercially available conjugated polymers. “The simulations gave us the design principles that will allow us to make even better conductors in the future,” Boudouris said.
The new polymer also provides insights for future research to be conducted by Boudouris, Savoie and other faculty at the Purdue-based Materials Innovation for Bioelectronics from Intrinsically-stretchable Organics (Mi-Bio) center, which aims to produce tailor-made polymers for biomedical applications.
“Conducting polymers are different from other conductors in that they can reversibly exchange ions and analytes with liquid media—kind of like a sponge—and this creates all kinds of interesting sensing and device applications.” Savoie said.
The Latest on: Transparent electronics
via Google News
The Latest on: Transparent electronics
- Ensuring transparent disposal of forfeited assetson December 6, 2021 at 3:25 pm
To fight corruption effectively, the Federal Government should put the recovery and the sale of assets in the public domain. As of October, the Inter-ministerial Committee on the Disposal of Forfeited ...
- The Ultimate Streetwear Gift Guide For The 2021 Holiday Seasonon November 30, 2021 at 6:56 pm
Shopping for the person in your life who is streetwear obsessed? Dive into our ultimate streetwear gift guide -- we’ve got you covered!
- These transparent Apple prototypes clearly show the greatness of see-through gadgetson November 30, 2021 at 12:56 pm
Apple device collector Giulio Zompetti has photographed a prototype 29W Apple charging brick, and it may be one of the rare instances where the product-in-progress may look better than the final ...
- Nandal Finance gets nod to buy Central Electronics for ₹210 cron November 29, 2021 at 11:04 pm
A ministerial group, comprising Union ministers Nitin Gadkari, Nirmala Sitharaman, and Jitendra Singh, has approved a ₹210-crore bid by Nandal Finance and Leasing Pvt. Ltd to acquire state-owned ...
- Government sells Central Electronics for Rs210 cron November 29, 2021 at 6:21 pm
The Cabinet Committee on Economic Affairs (CCEA) has approved the sale of Central Electronics Ltd (CEL) to Nandal Finance and Leasing Pvt Ltd for Rs 210 crore.
- Nandal Finance to acquire Centre's 100% stake in Central Electronicson November 29, 2021 at 6:16 pm
The Centre has decided the sale of Central Electronics (CEL) to Nandal Finance and Leasing for Rs 210 crore. The Cabinet Committee on Economic Affairs (CCEA) empowered Alternative Mechanism approved ...
- Government approves strategic disinvestment of Central Electronics Ltd.on November 29, 2021 at 12:07 pm
The Union Government has approved the strategic disinvestment of Central Electronics Ltd. The Cabinet Committee on Economic Affairs (CCEA) empowered Alternative Mechanism (AM) has approved the highest ...
- Government Okays 100% Stake Sale In Central Electronics Limitedon November 29, 2021 at 9:23 am
Government has cleared sale of its entire100 per cent stake in Central Electronics Ltd (CEL), to Nandal Finance and Leasing Private Limited ...
- Govt sells Central Electronics to Nandal Finance & Leasingon November 29, 2021 at 8:31 am
The Cabinet Committee on Economic Affairs (CCEA) empowered alternative mechanism (AM) has approved the highest price bid of Nandal Finance and Leasing for sale of 100 per cent equity shareholding of ...
via Bing News