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

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

NMRC, University of Nottingham chooses the Quorum Q150 coater for its reliable and reproducible film thickness when coating samples with iridium June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Possible Futures

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Physicists make quantum leap in understanding life's nanoscale machinery June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

Chip Technology

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

New TriboLab CMP Provides Cost-Effective Characterization of Chemical Mechanical Wafer Polishing Processes: Bruker Updates Industry-Standard CP-4 Platform for Most Flexible and Reliable Testing June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

Discoveries

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Physicists make quantum leap in understanding life's nanoscale machinery June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Materials/Metamaterials

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Rice U. chemists create 3-D printed graphene foam June 22nd, 2017

Alloying materials of different structures offers new tool for controlling properties June 19th, 2017

Smart materials used in ultrasound behave similar to water, Penn chemists report June 16th, 2017

Announcements

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

NMRC, University of Nottingham chooses the Quorum Q150 coater for its reliable and reproducible film thickness when coating samples with iridium June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

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

X-ray photoelectron spectroscopy under real ambient pressure conditions June 28th, 2017

Physicists make quantum leap in understanding life's nanoscale machinery June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Energy

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

Enhanced photocatalytic activity by Cu2O nanoparticles integrated H2Ti3O7 nanotubes June 21st, 2017

Cambridge Nanotherm partners with Inabata for global sales and distribution June 20th, 2017

Development of low-dimensional nanomaterials could revolutionize future technologies June 15th, 2017

Solar/Photovoltaic

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

Enhanced photocatalytic activity by Cu2O nanoparticles integrated H2Ti3O7 nanotubes June 21st, 2017

Development of low-dimensional nanomaterials could revolutionize future technologies June 15th, 2017

Scientists Design Molecular System for Artificial Photosynthesis: System is designed to mimic key functions of the photosynthetic center in green plants to convert solar energy into chemical energy stored by hydrogen fuel June 2nd, 2017

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project