Picture
LED lighting provides a unique set of advantages over traditional incandescent bulbs, as we recently discussed here on the green blog.  Yet there is an even more interesting development afoot in LED lighting: the engineering of organic LEDs. These diodes, or OLEDs, operate along the same principles as other LEDs, except that the emissive electroluminescent layer inside them consists of a film of organic compounds. A layer of organic semiconductor material is sandwiched between two electrodes inside of an OLED, giving rise to a unique technology with exciting applications. Organic LEDs can be utilized in televisions, computers, and mobile electronic devices, as well as in cases where solid state lighting is required.

There are two main types of OLEDs. Some are based on polymers while others utilize small molecules. Flexible, they are thinner than LCDs, as OLEDs require no backlight for their operation. For this reason, they can be far more efficient than LCD displays, and can even be manufactured to be transparent.

In terms of application, OLEDs can be utilized in several different ways.  They can be fashioned into a highly efficient display with demonstrable advantages over LCDs, or they can be utilized as a solid-state lamp, in a panelized manner.


Some of the most interesting uses of OLEDs pertain to their application in electronic displays.  When compared to LCDs, OLEDs offer a better contrast and a fuller viewing angle, while simultaneously requiring lower power consumption. OLEDs are also far more lightweight, and offer better durability.

As they are flexible, organic LEDs make curved displays on mobile devices possible.  Their transparency may also allow for OLEDs to be utilized in windows or car windshields, delivering data in a heads-up display where it would have otherwise been impractical to install one.

Organic LEDs are an eco-friendly nanotechnology, with organic, carbon-based materials like polymers used as the semi-conductive substrate. Though they make beautiful and highly efficient displays (RIM used OLEDs in their Blackberry 10 devices), they also have very practical applications as a light source.

An OLED "light bulb" generally comes in the form of a small panel. They provide a radiant, area-lighting glow, as opposed to the directed lighting of LEDs. Organic LEDs provide a good color temperature, and some panels on the market now can actually be color tuned for the desired warmth. Excitingly, these lamps also do not contain any harmful metals, like mercury, which can be found in CFLs.

As with any emergent technology, however, OLEDs are not without their drawbacks.  Currently, consumer-grade organic LED lamps and displays are expensive to produce. GE announced a new manufacturing process in 2008 that would allow OLEDs to be printed in a roll, much like newspapers. The development, which is expected to drive down the manufacturing costs of OLEDs, can also be adapted to create organic solar cells and roll-up displays in the future. The printing process has also been cited to advance the idea of OLED wallpaper, which could be manufactured roll-to-roll, and once applied, radiate light from a section of a wall.

One of the major drawbacks of OLED lighting, however, is the life expectancy of the panels.  Like any lightbulb or display, OLEDs don't last forever, though they dim over time, as opposed to suffering a catastrophic failure, like incandescent bulbs.  The organic materials used in the devices are particularly susceptible to degradation, though different colors break down at independent rates.
Blue luminance degrades by 12%, red by 7% and green by 8%, after just 1,000 hours of usage. Due to this fact, OLED displays, particularly when used in televisions, suffer from color balance issues, though manufacturers have developed various techniques to mitigate this problem.

After an average of just 14,000 hours, blue OLEDs will reach half of their original brightness. This is far less than LCD, LED or PDP technology, each of which are rated at about 25,000 – 40,000 hours to half brightness.

The organic components of OLEDs are also very susceptible to water damage, requiring proper sealing practices to be used during manufacturing.  This is particularly important when applied to flexible displays, the longevity of which can be threatened by a sealing failure. 

When utilized outdoors, recent advances in OLEDs have made them better than LCDs in bright sunlight.  Previously, the
metallic cathode in an OLED acted as a mirror, with reflectivity impeding their functions as a display.

Multiple manufacturers are now working to bring organic LEDs to market as an efficient, cost-effective option for lighting and digital displays.  Over the next several years, we can expect exciting developments that will change the way we shed light on our homes.
Picture
Organic LEDs present unique possibilities in the field of wearable tech.
 


Comments

12/23/2014 9:18am

Stunning post for realizing the importance of LED. like other things LED also play an important role in bringing innovation to our lives. much of things get more importance with the help of it. scientist use it for various purposes and bring new and advance appliances for us.

Reply
Dennis McCarthy
12/27/2014 10:55am

A fair OLED primer but it was a little negative or dismissive-
Some additional info- the blue emitters lifespan problem has
been solved, Lifespans for OLED wares are now typically at
40,000+ hours, and the stated concerns about encapsulation
have pretty much been resolved- two items that should have made
the quick comparision of the ILED vsOLED SSL wares :
A standard LED A-19 lamp putting out 850 lumens will have a BOM
manifest of 150+ component items - a comparible OLED lamp-
or luminiare would have a BOM around 40 - a very compelling reason for OLED lighting wares ascent-oh and those aforementioned
A-19s are cobbled together with components from 4 or 5 continents *
OLEPs and other Printed electronics can generate product from
just one or two regions - this, like the BOM angle are both key
indicators as to which of the 2 iterations will be in play for a longer period of time as the SSL of choice. Other FYIs as a closer -
did you know OLEDs can produce over 200 lm/watt ( best so far)
and the OLEP(products) class which includes OLEDs have
the very best Kilolumen per a gram metric.
The story of the ascent of OLEDs is significant - we the readers
appreciate your efforts to chronicle the developments.

Reply
12/28/2014 2:10pm

Hello, I really appreciate posts which contain interesting information and which I'm generally eager to read! Good web site!

Reply

Quite cool post. It is truly very nice and beneficial post.Thanks for sharing this with us!it is my initially visit.

Reply
03/26/2015 10:00am

This can unquestionably be extremely helpful for me when i get a possibility to start my site. I'm pleased to found these handy and exciting article that's created in nicely way.

Reply
04/10/2015 1:19am

imagine a city with LEDs! it'll definitely change the way the cities look at night.

Reply
05/29/2015 10:44am

I am sure LEDs are better than other lamps in the world! Thanks for this important information

Reply
06/11/2015 2:23pm

To tell the truth I have never heard about it! very curious facts

Reply

A major area of research is the development of white OLED devices for use in solid-state lighting applications.

Reply

Wow, structure is so complicated!

Reply
12/26/2015 1:45pm

Additionally study the credit terms and conditions purposefully and give watchful thought to the accreditation essentials and know unequivocally what property you are swearing rapidly the change,

Reply
04/03/2016 5:54am

This site on organic led is just great and mind blowing. This is one of the best and an awesome website of internet.

Reply
04/24/2016 3:07pm


Educators acquire abounding associate to see appointed accessories from their understudies and can additionally accuracy whether it was done by them, or whether they had accession away do it for them. It is not that difficult to accomplish for them, in afire of the way that they apperceive how you address and accomplish through the added achievement you've submitted and sometimes it is clumsily clear.

Reply
05/16/2016 2:55am

This is the best innovation in technology till now 21st centuary. This is one of the best and an awesome website of internet.

Reply
06/17/2016 3:11am

This is a great inspiring .I am pretty much pleased with your good work. You put really very helpful information. I am looking to reading your next post.

Reply
07/26/2016 12:49am

Hi there kids, you all have to watch hilarious videos, however keep in mind that first study then enjoyment okay.

Reply
08/19/2016 11:45am

Hi I would just like to say that I enjoyed checking out your blog and to wish you the best of luck with it as it progresses - Kenya Woking

Reply
09/28/2016 3:23am

Nowadays YouTube videos quality is more better and improved, so that’s the cause that I am watching this video at at this place.

Reply
10/04/2016 10:16am

thanks for nice blog keep it up

Reply
11/18/2016 12:49pm

They likewise offer a site so you can do everything on-line. It is at chase.com. You then need to go to "keeping-your-home." The site is anything but difficult to explore and offers shapes in the .pdf organize.

Reply
12/05/2016 3:24am

Thanks for providing great infomation. i have bookmarked your post. waiting for your next great article. Thanks again

Reply
12/05/2016 3:25am

ice to be visiting your blog again, it has been months for me. Well this article that i've been waited for so long. I need this article to complete my assignment in the college, and it has same topic with your article. Thanks, great share.

Reply
12/10/2016 9:04am

Reply
01/22/2017 5:23am

Great I foound this site today. I can get the best info from here. Thank you!

Reply
02/03/2017 8:20am

Good blog post. Very informative student site. Keep it up. Great work

Reply
02/03/2017 12:31pm

Well, this is really a very useful tips! I appreciate this knowledge.

Reply

Its pleasure to read about led. Actually i am searching new information from internet that's why i have visited your site its really worthy for me. Thanks for sharing such a useful site.

Reply



Leave a Reply