Featured Research

from universities, journals, and other organizations

Development of nonvolatile liquid anthracenes for facile full-color luminescence tuning: Application to foldable light-emitting devices expected

Date:
June 23, 2013
Source:
National Institute for Materials Science
Summary:
Scientists have developed a full-color tunable luminescent liquid material with excellent light stability based on an anthracene molecule, which is a general organic fluorescent dye.

Full-colour luminescence panels under ultraviolet (365nm) irradiation by adjustment of the nonvolatile blue-emitting anthracene liquid (left: photo) in the material.
Credit: Image courtesy of National Institute for Materials Science

A research team headed by Dr. Takashi Nakanishi, a Principal Researcher of the NIMS Organic Materials Group, Polymer Materials Unit, developed a full-colour tunable luminescent liquid material with excellent light stability based on an anthracene molecule, which is a general organic fluorescent dye.

A research team headed by Dr. Takashi Nakanishi, a Principal Researcher of the Organic Materials Group (Group Leader: Masayuki Takeuchi), Polymer Materials Unit (Unit Director: Izumi Ichinose) of the National Institute for Materials Science (President: Sukekatsu Ushioda), developed a full-colour tunable luminescent liquid material with excellent photostability based on anthracene, which is a general organic fluorescent dye.

In the development of full-colour display monitors, mobile devices, and other electronic devices, organic molecular and polymer materials are essentially important, as they offer advantages such as light weight, flexibility, and printability. However, in virtually all cases, the light-emitting organic molecular materials developed until now have had difficulties to demonstrate their inherent luminescent performance due to various problems, which include low photostability (durability to prevent discoloration or decolorization under photoirradiation) and aggregation of molecules in the coating process. Moreover, from the viewpoint of production of flexible devices, materials should be free of deterioration of the continuous emissive layer, even when subjected to excessive bending and folding. On the other hand, development of organic molecular materials which enable simple, low-cost manufacture of full-colour luminescence devices, in comparison with individual synthesis of organic molecular materials that display various luminescent colours, is also desired.

The team led by Dr. Nakanishi developed a blue-emitting liquid material which is free of aggregation among adjacent anthracene parts, has a melting point of approximately -60 °C, and is thermally stable up to about 300 °C, by attaching highly flexible branched alkyl chains around an anthracene core moiety, which is a fluorescent general dye molecule. This material is a low-viscosity liquid with viscosity of approximately 0.3 Pa-s at room temperature and is a blue-emitting with an absolute fluorescence quantum yield of ca. 55% and photostable more than 5~10 times longer lifetime than that of commercially-available anthracene dyes. Furthermore, because other luminescent dye molecules can be doped homogeneously in this liquid, it was found that full-colour luminescence tuning is available assisted by up to 96% fluorescence resonance energy transfer (FRET) of dyes by single blue-light (365nm) excitation.

In this research, a blue-emitting anthracene liquid with excellent photostability was synthesized, and a liquid material which displays high quality full-colour luminescence and precise luminescence tuning by the facile operation of doping the liquid with other dyes was developed. Since the nonvolatile liquid material developed in this work can be coated on the surface of various substrates, production of organic multicolour devices with stable single color excitation can be expected. A continuous active emitting layer can be maintained, without breaking or interruption even when bent and folded, which is a favorable property for the development of foldable flexible devices.


Story Source:

The above story is based on materials provided by National Institute for Materials Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sukumaran Santhosh Babu, Martin J. Hollamby, Junko Aimi, Hiroaki Ozawa, Akinori Saeki, Shu Seki, Kenji Kobayashi, Keita Hagiwara, Michito Yoshizawa, Helmuth Möhwald, Takashi Nakanishi. Nonvolatile liquid anthracenes for facile full-colour luminescence tuning at single blue-light excitation. Nature Communications, 2013; 4 DOI: 10.1038/ncomms2969

Cite This Page:

National Institute for Materials Science. "Development of nonvolatile liquid anthracenes for facile full-color luminescence tuning: Application to foldable light-emitting devices expected." ScienceDaily. ScienceDaily, 23 June 2013. <www.sciencedaily.com/releases/2013/06/130623153502.htm>.
National Institute for Materials Science. (2013, June 23). Development of nonvolatile liquid anthracenes for facile full-color luminescence tuning: Application to foldable light-emitting devices expected. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2013/06/130623153502.htm
National Institute for Materials Science. "Development of nonvolatile liquid anthracenes for facile full-color luminescence tuning: Application to foldable light-emitting devices expected." ScienceDaily. www.sciencedaily.com/releases/2013/06/130623153502.htm (accessed October 23, 2014).

Share This



More Matter & Energy News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com
What Is Magic Leap, And Why Is It Worth $500M?

What Is Magic Leap, And Why Is It Worth $500M?

Newsy (Oct. 22, 2014) — Magic Leap isn't publicizing much more than a description of its product, but it’s been enough for Google and others to invest more than $500M. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins