New technology could revolutionise printed electronics by enabling high quality semiconducting molecular crystals to be directly spray-deposited on any surface.
University of Surrey and National Physical Laboratory’s research allows to convert organic semiconducting inks into isolated crystals through a scalable process, suitable for a wide range of molecules.
The research has a direct impact on printed electronic applications for flexible circuits, advanced photodetector arrays, chemical and biological sensors, robotic skin tensile sensors, x-ray medical detectors, light emitting transistors and diodes, and miniature lasers.
Has the time come to replace traditionally used silicon with printable organic semiconductor inks? University of Surrey scientists believe so, especially for future electronics that need to be flexible, lightweight, wearable and low-cost.
Single crystal semiconductors, such as silicon, have been at the forefront of scientific interest for more than 70 years, serving as the backbone of electronic devices. Inorganic single crystals are typically grown from a melt at very high temperatures, in special chambers filled with inert gas, using time-consuming and energy intensive processes. A new class of crystalline materials, called organic semiconductors, can also be grown as single crystals, but in a very different way, using solution-based methods at room temperature in air, opening up the possibility of large-scale production of inexpensive electronics, targeting numerous applications ranging from field effect transistors and light emitting diodes to medical x-ray detectors and miniature lasers.
New research, published today in Nature Communications, conducted by a team of researchers from the University of Surrey and National Physical Laboratory, demonstrates for the first time a low-cost, scalable spray-printing process to fabricate high-quality isolated organic single crystals. The method is suitable for a wide variety of semiconducting small molecules, which can be dissolved in solvents to make semiconducting inks, and then be deposited on virtually any substrate. The key aspect is in combining the advantages of antisolvent crystallization and solution shearing. The crystals’ size, shape and orientation are then controlled by the spay angle and distance to the substrate, which govern the spray droplets’ impact onto the antisolvent’s surface. These crystals are high quality structures, as confirmed by a combination of characterisation techniques, including polarised optical and scanning electron microscopy, x-ray diffraction, polarised Raman spectroscopy and field-effect transistor tests.
“This method is a powerful, new approach for manufacturing organic semiconductor single crystals and controlling their shape and dimensions,” said Dr Maxim Shkunov from the Advanced Technology Institute at the University of Surrey.
“If we look at silicon, it takes almost 15000C to grow semiconductor grade crystals, while steel spoons will melt at this temperature, and it will fetch a very hefty electric bill for just 1 kg of silicon, same as for running a tea kettle for over 2 days non–stop. And then, you would need to cut and polish those silicon ‘boules’ into wafers.
“We can make single crystals in a much simpler way, entirely at room temperature with a £5 artist spray brush. With a new class of organic semiconductors based on carbon atoms, we can spray-coat organic inks onto anything, and get more or less the right size of crystals for our devices right away.”
Dr Maxim Shkunov, lead author of the research, continued: “The trick is to cover the surface with a non-solvent so that semiconductor molecules float on top and self-assemble into highly ordered crystals. We can also beat silicon by using light emitting molecules to make lasers, for example, – something you can’t do with traditional silicon. This molecular crystals growth method opens amazing capabilities for printable organic electronics.”
The Latest on: Printable organic electronics
via Google News
The Latest on: Printable organic electronics
- Daniel Melville interview: What it feels like to have a Metal Gear Solid bionic armon November 27, 2020 at 7:31 am
The progress made in just a couple of years shows how we’re moving to a world that blends organic and artificial ... All of it, the electronics, the sensors and all that, is in the arm.
- China's top LCD makers gobble up rivals as expansion hits limitson November 24, 2020 at 5:18 pm
As the global market for liquid crystal displays nears saturation, China's top two producers are rushing to acquire existing facilities in a bid to further cement their dominance. Production capacity ...
- Ynvisible Appoints Piotr Wierzchowiec to Head of Functional Ink Products & Development Completes Advisory Board Expansion With Three New Expertson November 11, 2020 at 4:01 pm
Wierzchowiec brings Ynvisible over twelve years of experience in developing materials, inks, and printing processes for organic and printed electronics ... At Merck, Piotr Wierzchowiec was Head of ...
- Quantum-Dot Transistors: A Potential Alternative to Flexible Electronics?on November 11, 2020 at 10:29 am
Colloidal quantum dots consist of a semiconductor core surrounded by organic ... electronics, security, and medical technology. “Potential applications of the new approach to electronic devices based ...
- Organic photodiodes challenge silicon over wide areason November 6, 2020 at 7:31 am
Large-area organic photodiodes can now offer advantages over conventional silicon photodiodes, particularly noise advantages, according to Georgia Tech, which has solution-processed flexible organic ...
- Organic electronics Market - Global Industry Analysis, Size, Share, Growth, Trends, and Forecaston November 5, 2020 at 6:47 am
Electronics & ICT, Packaging, and Others. Our portfolio includes set of market research insights such as market sizing and market forecasting, market share analysis and key positioning of the ...
- Large-area flexible organic photodiodes can compete with silicon deviceson November 4, 2020 at 4:00 pm
That work, part of Georgia Tech's Center for Organic Photonics and Electronics, has involved extensive device modeling to understand the basic science, and research to continuously boost ...
- Yanfeng Technology unites varied technologies to develop new productson November 1, 2020 at 9:09 pm
Last year, the Shanghai-based Yanfeng, No. 19 on Automotive News' ranking of global suppliers, decided to combine the R&D activities of its interiors, seating, electronics, safety and exteriors ...
- Curtiss-Wright Corporation's (CW) CEO Dave Adams on Q3 2020 Results - Earnings Call Transcripton November 1, 2020 at 6:36 am
Any references to organic growth, excluding the effects of ... This was largely due to the build-to-print nature of the work. If you recall, as we enter 2019, we experienced some delays in ...
via Bing News