“Ultimately we want to have low cost, low toxicity, and the ability to make flexible devices”
It’s not easy going green. For home lighting applications, organic light emitting diodes (OLEDs) hold the promise of being both environmentally friendly and versatile. Though not as efficient as regular light-emitting diodes (LEDs), they offer a wider range of material choices and are more energy efficient than traditional lights. OLEDs can also be applied to flexible surfaces, which may lead to lights or television displays that can be rolled up and stowed in a pocket.
A promising line of research involves combining the OLEDs with inorganic quantum dots, tiny semiconductor crystals that emit different colors of light depending on their size. These “hybrid” OLEDs, also called quantum dot LEDs (QD-LEDs), increase the efficiency of the light-emitting devices and also increase the range of colors that can be produced. But commercially manufacturing this promising green technology is still difficult and costly.
To make OLEDs more cheaply and easily, researchers from the University of Louisville in Kentucky are developing new materials and production methods using modified quantum dots and inkjet printing. The team will discuss its work developing more commercially feasible QD-LED devices at the Conference on Lasers and Electro-Optics (CLEO: 2013) June 9-14 in San Jose, Calif.
According to Delaina Amos, professor at the University of Louisville and principal investigator of the team’s efforts, expense of materials and manufacturing processes has been a major barrier to using OLEDs in everyday lighting devices.
To inexpensively apply the quantum dots to their hybrid devices, the Louisville researchers use inkjet printing, popular in recent years as a way to spray quantum dots and OLED materials onto a surface with great precision. But unlike other groups experimenting with this method, Amos’ team has focused on adapting the inkjet printing technique for use in a commercial setting, in which mass production minimizes expense and translates to affordable off-the-shelf products. “We are currently working at small scale, typically 1 inch by 1 inch for the OLEDs,” Amos says. “The process can be scaled up from here, probably to 6 inches by 6 inches and larger.”
“There’s a reason you don’t see OLED lights on sale at the hardware store,” says Amos, though she adds that they do find uses in small devices such as cameras, photo frames, and cell phone displays. To bring their QD-LEDs closer to becoming market-ready as household lighting appliances, Amos and her team have been synthesizing new, less expensive and more environmentally friendly quantum dots. The team has also modified the interfaces between the quantum dots and other layers of the OLED to improve the efficiency with which electrons are transferred, allowing them to produce more efficient light in the visible spectrum.
In addition to their higher efficiency, wider range of colors, and ability to be applied to flexible surfaces, Amos’ QD-LEDs also use low-toxicity materials, making them potentially better for the environment. “Ultimately we want to have low cost, low toxicity, and the ability to make flexible devices,” Amos says. The team has recently demonstrated small working devices, and Amos adds that she hopes to have larger devices within the next several months.
The Latest Bing News on:
Quantum Dot LEDs
- Directors’ Deals: Dots director dashes for cashon April 26, 2024 at 10:00 am
He has been selling this down in chunks, however, and recently offloaded 1.25mn shares, or around 0.58 per cent of the company. At the closing price of 1,466p on the day Meeson’s shares dropped below ...
- 💻 Invention of a stretchable quantum dot displayon April 26, 2024 at 4:00 am
The quest to create inherently stretchable displays has begun. Traditional displays are limited by rigid and inflexible components. It is therefore imperative to find innovative materials and ...
- QLED vs. OLED: Weighing Different TV Optionson April 25, 2024 at 7:51 am
If you're shopping for a new TV, you may have to weigh the pros and cons of a QLED vs. OLED TV display. These two types of technology are similarly named but fundamentally very different.
- Flat optics revolutionize quantum light sources for enhanced communication and sensingon April 24, 2024 at 5:00 pm
In another example, the integration of a single quantum dot with a circular Bragg grating metasurface led to a 20-fold increase in the collection efficiency of single photons by a ...
- QDEL technology set to become the premium display replacement to OLEDs by 2026on April 24, 2024 at 2:05 pm
Micro-LEDs are in line to replace OLEDs but need another half decade or so of development before commercialization. Noctiluca notes that micro-LED tech will be ideal ...
- Sony Bravia 9 Mini LED TV First Look - The Future Is (Seriously) Brighton April 23, 2024 at 5:49 am
So the first thing I should say about the Bravia 9 is that it certainly delivers on that brightness theme. In side by side tests against both one of Sony’s 2023 X95L flagship Mini LED models and ...
- Meet QDEL, the backlight-less display tech that could replace OLED in premium TVson April 22, 2024 at 3:59 am
If you’re into high-end display tech, QDEL should be on your radar.
- TCL launches T7K Mini LED TVs with 4K 144Hz XDR display, ultra-thin design, 1600 nits brightnesson April 21, 2024 at 6:54 am
TCL T7K Mini LED TV series, 55-98 inches, features up to 1600 nits brightness, 4K 144Hz, and smart capabilities, starting at 3299 RMB.
- TCL launches 65T7K Mini-LED TV boasting 4K 144Hz, 512 dimming zones, 1600nits brightness & moreon April 20, 2024 at 3:01 am
TCL launches the 65T7K Mini-LED TV with 4K 144Hz display, 512 dimming zones, and high-quality audio for 4299 yuan on JD.com ($605).
- Researchers develop stretchable quantum dot displayon April 15, 2024 at 8:53 am
A team of South Korean scientists led by Professor KIM Dae-Hyeong of the Center for Nanoparticle Research within the Institute for Basic Science has pioneered a novel approach to stretchable displays.
The Latest Google Headlines on:
Quantum Dot LEDs
[google_news title=”” keyword=”Quantum Dot LEDs” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
The Latest Bing News on:
OLED lights
- Asus Zenbook S13 OLED Review (2024): Slim To The Max And Meddling With MacBook Airon April 26, 2024 at 11:38 am
Asus Zenbook S13 OLED takes the battle directly to the top of the segment -- with as thin a profile as you could want with Intel EVO in the mix.
- Samsung S95D QD-OLED TV review: Stunning in any settingon April 26, 2024 at 10:00 am
You can’t get away from AI in the gadget world and this TV is no exception. The S95D comes toting Samsung’s latest image processing chip, which puts a heavy emphasis on AI. Multiple neural networks ...
- Wacom's first OLED pen display is also the thinnest and lightest it has ever madeon April 26, 2024 at 7:52 am
Wacom displays and tablets have been handy tools for artists and designers since the 1980s, offering to swap a mouse for a pen for drawing, photo editing and more. That lineage includes pen displays: ...
- Wacom’s first OLED tablet is meant for drawing on the goon April 26, 2024 at 7:37 am
Gaming monitors and laptops are all about that OLED panel upgrade at the moment, but what if your interests are a little less pew pew and a little more scribble scribble? Then you’re probably already ...
- Wacom says its first OLED drawing tablet is cool and skinnyon April 25, 2024 at 1:05 pm
Wacom has thrown a tablet-shaped curveball at digital creatives waiting on Apple’s highly anticipated OLED iPads. The company introduced the Wacom Movink 13 on Wednesday, its own OLED-based offering ...
- Forget OLED TVs — this new triple-laser projector can beam a 150-inch picture with 3,000 lumens of brightnesson April 25, 2024 at 9:47 am
In line with the vision of ‘big screen, big value’ on its 2024 TV lineup, Hisense is bringing to market an exciting new ultra short throw (UST) projector that sports 3,000 lumens of brightness and ...
- Wacom's first OLED pen display is incredibly thin and lighton April 25, 2024 at 3:00 am
The new product promises all the benefits of OLED displays, with more contrast, deeper blacks and more vibrant colours. But it also has another big selling point: it's the thinnest and lightest Wacom ...
- LG Releasing New OLED Gaming Panels With 'First-Ever' Featureson April 23, 2024 at 7:11 pm
LG announces the development of a new OLED display that uses brand-new technology and has already started its mass production.
- Samsung’s new glare-free OLED TV is receiving its first discounton April 23, 2024 at 12:59 pm
Don’t kick yourself if you missed out on Samsung’s free TV preorder promo from earlier this month. The company is now offering a much better cash discount on one of its most notable new models: the ...
- Meet QDEL, the backlight-less display tech that could replace OLED in premium TVson April 22, 2024 at 3:59 am
If you’re into high-end display tech, QDEL should be on your radar.
The Latest Google Headlines on:
OLED lights
[google_news title=”” keyword=”OLED lights” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]