Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > In a project funded by the Austrian Science Fund FWF, the physicist Serdar Sarıçiftçi investigates possible uses in electronics of the semiconductor properties of indigo pigment

Abstract:
Silicon still represents the most important material for the production of semiconductor elements such as transistors, diodes or solar cells. For a number of years, however, an interesting alternative has been available: certain hydrocarbons that also exhibit semiconductor properties are now the new standard in OLED displays of mobile phones and television sets. Moreover, these "organic" semiconductors, as these hydrocarbons are also called, can also be used for solar cells or transistors. Their big disadvantage is their lack of stability: atmospheric oxygen quickly destroys these elements, which is why they need to be packaged in an airtight cover. A research team led by the physicist Serdar Sarıçiftçi from the Johannes Kepler University Linz has now achieved a breakthrough in solving this problem. In a project funded by the Austrian Science Fund FWF, the team managed to produce semiconductors related to the indigo pigment which is not only stable when exposed to air, but also under water.

In a project funded by the Austrian Science Fund FWF, the physicist Serdar Sarıçiftçi investigates possible uses in electronics of the semiconductor properties of indigo pigment

Linz, Austria | Posted on June 14th, 2017

A MIRACLE MATERIAL THAT IS DIFFICULT TO PROCESS

"Actually, we were looking for semiconductor materials that are biodegradable", explains Sarıçiftçi. "In the process we came across this biblical material known as indigo. Indigo and its derivatives exhibit true semiconductor properties. "It did not come as a surprise that indigo showed high stability: "Indigo was used, for instance, in the tombs of Pharaohs, where it is still visible after thousands of years. And the blue in jeans’ material is well known for its sturdiness", notes Sarıçiftçi.
Processability was the problem in using indigo as a semiconductor: it is almost insoluble, which, incidentally, partly explains its durability. Many methods to produce organic semiconductor elements do, however, require the material to be first dissolved in some way and then deposited on a carrier medium. Sarıçiftçi and his group managed to render the pigment soluble by binding volatile side groups to the indigo molecule. When heated above 100°C these side groups split off again.
That has removed the main obstacle to using indigo as a semiconductor, says Sarıçiftçi: "We see this stability of indigo as a game changer. We advise everyone working on organic transistors to concentrate on this class of materials from now on."

UNANSWERED QUESTIONS ABOUT SOLAR CELLS AND LIGHT DIODES

Does this mean the entire field of organic semiconductors can now shift to indigo compounds? Sarıçiftçi sounds a note of caution: "Owing to the hydrogen bonds, indigo has strong luminescence-quenching properties."This weak bond between molecules, which plays an important role in ice, has a disruptive effect on optical applications.
The function of solar cells, for instance, is based on irradiating light interacting with the material, which releases electrons and initiates a current. In indigo molecules, however, such "excited" electronic states are quickly dissipated and converted into heat before they can be used. That means that both solar cells and light-emitting diodes will be difficult to realise with the indigo family of compounds. "We are trying to work around this problem, but there is no real solution to it", explains. Sarıçiftçi. This is an aspect he is currently researching. Transistors are not affected by such problems.

ELECTRONICS FOR IMPLANTS

Sarıçiftçi perceives great potential for indigo materials in medical uses. "We are devoting particular attention to the bio-compatibility of indigo transistors. We were able to show that they can operate even under water at different pH levels. "This means they can be used for implants in human tissue. "It opens the door for bio-applications", observes Sarıçiftçi. Most recently his group published several articles on this issue in renowned journals and was granted a patent. In 2014, he started organising an annual conference on the topic of bioelectronics. (www.bioel.at ).
The low cost of the basic material might also be a decisive advantage. "This will be an argument for future mass applications", notes Sarıçiftçi.

Personal details

Niyazi Serdar Sarıçiftçi (http://www.jku.at/ipc/content/e166682/index_html?emp=e166682/employee_groups_wiss166683/employees166692 ) is a physicist and head of the Linz Institute for Organic Solar Cells (LIOS, http://www.jku.at/ipc/content ) and the Institute of Physical Chemistry at the Johannes Kepler University Linz. His research focus lies on organic semiconductors, and in particular organic solar cells. Sarıçiftçi has received numerous awards, including the 2012 Wittgenstein Award (http://www.fwf.ac.at/en/research-funding/fwf-programmes/wittgenstein-award/ ) from the FWF. He is a corresponding member of the Austrian Academy of Sciences (ÖAW).

####

For more information, please click here

Contacts:

Scientific Contact
Professor Niyazi Serdar Sariciftci
Johannes Kepler University
Linz
Altenbergerstraße 69
4040 Linz, Austria
T +43 / 732 / 2468 5844
E
W http://www.lios.at/

Austrian Science Fund FWF
Ingrid Ladner
Haus der Forschung
Sensengasse 1
1090 Vienna, Austria
T +43 / 1 / 505 67 40 - 8117
E
W http://scilog.fwf.ac.at/en/
W http://www.fwf.ac.at/en

Distribution
PR&D – Public Relations for Research and Education
Mariannengasse 8
1090 Vienna, Austria
T +43 / 1 / 505 70 44
E
W http://www.prd.at/en

Copyright © Johannes Kepler University Linz

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

Glowacki E., Tangorra R., Coskun H., Farka D., Operamolla A., Kanbur Y., Milano F., Giotta L., Farinola G., Sariciftci N.S. Bioconjugation of hydrogen-bonded organic semiconductors with functional proteins in: Journal of Materials Chemistry C, 2015

Glowacki E., Apaydin D., Bozkurt Z., Monkowius U., Demirak K., Tordin E., Himmelsbach M., Schwarzinger C., Burian M., Lechner R., Demitri N., Voss G., Sariciftci N.S. Air-stable organic semiconductors based on 6,60-dithienylindigo and polymers thereof in: Journal of Materials Chemistry C, Volume 2, Page(s) 8089, 2014:

Glowacki E., Romanazzi G., Yumusak C., Coskun H., Monkowius U., Voss G., Burian M., Lechner R., Demitri N., Redhamm G., Sünger N., Suranna G., Sariciftci N.S. Epindolidiones - Versatile and Stable Hydrogen-Bonded Pigments for Organic Field-Effect Transistors and Light-Emitting Diodes in: Advanced Functional Materials, Volume 25, Page(s) 776, 2015:

Glowacki E., Voss G., Sariciftci N.S. 25th Anniversary Article: Progress in Chemistry and Applications of Functional Indigos for Organic Electronics in: Advanced Materials, Volume 25, Page(s) 6783, 2013:

Related News Press

News and information

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Possible Futures

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Graphene origami as a mechanically tunable plasmonic structure for infrared detection April 25th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Chip Technology

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

New qubit now works without breaks: A universal design for superconducting qubits has been created April 19th, 2018

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

When superconductivity disappears in the core of a quantum tube: By replacing the electrons with ultra-cold atoms, a group of physicists has created a perfectly clean material, unveiling new states of matter at the quantum level April 16th, 2018

Discoveries

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Graphene origami as a mechanically tunable plasmonic structure for infrared detection April 25th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Materials/Metamaterials

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

Announcements

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Arbe Robotics Selects GLOBALFOUNDRIES for its High-Resolution Imaging Radar to Enable Safety for Autonomous Cars: Arbe Robotics’ proprietary chipset leverages GF’s 22FDX® technology to deliver industry’s first real-time 4D imaging radar for level 4 and 5 autonomous driving April 26th, 2018

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

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

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Getting a better look at living cells April 25th, 2018

Graphene origami as a mechanically tunable plasmonic structure for infrared detection April 25th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Energy

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Psst! A whispering gallery for light boosts solar cells April 14th, 2018

High efficiency solar power conversion allowed by a novel composite material: A composite thin film developed at INRS improves significantly solar cells' power conversion efficiency April 10th, 2018

Light 'relaxes' crystal to boost solar cell efficiency: Rice, Los Alamos discovery advances case for perovskite-based solar cells April 6th, 2018

Solar/Photovoltaic

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

Psst! A whispering gallery for light boosts solar cells April 14th, 2018

High efficiency solar power conversion allowed by a novel composite material: A composite thin film developed at INRS improves significantly solar cells' power conversion efficiency April 10th, 2018

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