Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > New synthesis method opens up possibilities for organic electronics

New direct arylation polycondensation method opens the door to synthesize various promising n-type semiconducting polymers
New direct arylation polycondensation method opens the door to synthesize various promising n-type semiconducting polymers

Abstract:
Scientists at Tokyo Institute of Technology (Tokyo Tech) modify a previous synthesis method to create a new semiconducting polymer with remarkable properties which could be used in organic electronic devices such as thin film transistors.

New synthesis method opens up possibilities for organic electronics

Tokyo, Japan | Posted on August 7th, 2019

Semiconducting polymers, very large chain-like molecules made from repeating sub-units, are increasingly drawing the attention of researchers because of their potential applications in organic electronic devices. Like most semiconducting materials, semiconducting polymers can be classified as p-type or n-type according to their conducting properties. Although p-type semiconducting polymers have seen dramatic improvements thanks to recent advances, the same cannot be said about their n-type counterparts, whose electron-conducting characteristics (or 'electron mobility') are still poor.

Unfortunately, high-performance n-type semiconducting polymers are necessary for many green applications, such as various types of solar cells. The main challenges holding back the development of n-type semiconducting polymers are the limited molecular design strategies and synthesis procedures available. Among the existing synthesis methods, DArP (which stands for 'direct arylation polycondensation') has shown promising results for producing n-type semiconducting polymers in an environmentally friendly and efficient way. However, until now, the building blocks (monomers) used in the DArP method were required to have an orienting group in order to produce polymers reliably, and this severely limited the applicability of DArP to make high-performance semiconducting polymers.

Luckily, a research team from Tokyo Institute of Technology led by Prof. Tsuyoshi Michinobu found a way around this. They managed to reliably produce two long n-type semiconducting polymers (referred to as P1 and P2) through the DArP method by using palladium and copper as catalysts, which are materials or substances that can be used promote or inhibit specific reactions.

The two polymers were almost identical and contained two thiazole rings–pentagonal organic molecules that contain a nitrogen atom and a sulfur atom. However, the position of the nitrogen atom of the thiazole rings was slightly different between P1 and P2 and, as the researchers found out, this led to significant and unexpected changes in their semiconducting properties and structure. Even though P1 had a more planar structure and was expected to have a higher electron mobility, it was P2 who stole the show. The backbone of this polymer is twisted and looks similar to alternating chain links. More importantly, the researchers were surprised to find that the electron mobility of P2 was forty times higher than that of P1 and even higher than that of the current benchmark n-type semiconducting polymer. "Our results suggest the possibility of P2 being the new benchmark among n-type semiconducting materials for organic electronics," remarks Prof. Michinobu.

In addition, semiconducting devices made using P2 were also remarkably stable, even when stored in air for a long time, which is known to be a weakness of n-type semiconducting polymers. The researchers believe that the promising properties of P2 are because of its more crystalline (ordered) structure compared with P1, which changes the previous notion that semiconducting polymers should have a very planar structure to have better semiconducting properties. "Our new DArP method opens a door for synthesizing various promising n-type semiconducting polymers which cannot be obtained via traditional methods," concludes Prof. Michinobu. This work is another step in the direction towards a greener future with sustainable organic electronics.

####

For more information, please click here

Contacts:
Associate Professor Tsuyoshi Michinobu

School of Materials and Chemical Technology

Email
Tel +81-3-5734-3774

Contact

Public Relations Section, Tokyo Institute of Technology

Email
Tel +81-3-5734-2975

KAZUHIDE HASEGAWA



University Research Administrator

Global Research Communications

Office of Research and Innovation

Tokyo Tech

 2-12-1-E3-10 Ookayama, Meguro-ku, Tokyo 152-8550



 TEL: +81-3-5734-3257 FAX: +81-3-5734-3683

Copyright © Tokyo Institute of Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Reference

Related News Press

News and information

Princeton-led team discovers unexpected quantum behavior in kagome lattice:Experiments suggest evidence for novel patterns of electronic charge distribution in a kagome material whose handedness can be manipulated with a magnetic field June 18th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Organic Electronics

Molecular coating enhances organic solar cells June 11th, 2021

Light-emitting tattoo engineered for the first time: Scientists at UCL and the IIT -Istituto Italiano di Tecnologia (Italian Institute of Technology) have created a temporary tattoo with light-emitting technology used in TV and smartphone screens, paving the way for a new type of March 4th, 2021

Going Organic: uOttawa team realizing the limitless possibilities of wearable electronics January 28th, 2021

Engineers find antioxidants improve nanoscale visualization of polymers January 8th, 2021

Thin films

Thin is now in to turn terahertz polarization: Rice lab’s discovery of ‘magic angle’ builds on its ultrathin, highly aligned nanotube films May 20th, 2021

Possible Futures

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Chip Technology

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Rice lab peers inside 2D crystal synthesis: Simulations could help molecular engineers enhance creation of semiconducting nanomaterials June 11th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Discoveries

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Announcements

Proliferation of electric vehicles based on high-performance, low-cost sodium-ion battery:A large-capacity anode material is developed for sodium-ion batteries by using low-cost silicone-based oil. This process, if commercialized, is expected to significantly reduce manufacturing June 18th, 2021

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Princeton-led team discovers unexpected quantum behavior in kagome lattice:Experiments suggest evidence for novel patterns of electronic charge distribution in a kagome material whose handedness can be manipulated with a magnetic field June 18th, 2021

AI app could help diagnose HIV more accurately: Pioneering technology developed by UCL (University College London) and Africa Health Research Institute (AHRI) researchers could transform the ability to accurately interpret HIV test results, particularly in low- and middle-income June 18th, 2021

Compact quantum computer for server centers: Researchers build smallest quantum computer yet based on industry standards June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Energy

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Active platinum species: Catalytic high-temperature oxidations: Individual atom or metal cluster? June 16th, 2021

Molecular coating enhances organic solar cells June 11th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Solar/Photovoltaic

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Molecular coating enhances organic solar cells June 11th, 2021

New form of silicon could enable next-gen electronic and energy devices: Novel crystalline form of silicon could potentially be used to create next-generation electronic and energy devices June 4th, 2021

Researchers build structured, multi-part nanocrystals with super light-emitting properties May 28th, 2021

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project