KIT Scientists Develop Multicolor LEDs without Heavy Metals
Silicon nanocrystals have a size of a few nanometers and possess a high luminous potential. Scientists of KIT and the University of Toronto/Canada have now succeeded in manufacturing silicon-based light-emitting diodes (SiLEDs). They are free of heavy metals and can emit light in various colors.
Silicon dominates in microelectronics and photovoltaics industry, but has been considered unsuitable for light-emitting diodes for a long time. However, this is not true for nanoscopic dimensions: Minute silicon nanocrystals can produce light. These nanocrystals consist of a few hundred to thousand atoms and have a considerable potential as highly efficient light emitters, as was demonstrated by the team of Professor Uli Lemmer and Professor Annie K. Powell from KIT as well as Professor Geoffrey A. Ozin from the University of Toronto. In a joint project, the scientists have now succeeded in manufacturing highly efficient light-emitting diodes from the silicon nanocrystals.
So far, manufacture of silicon light-emitting diodes has been limited to the red visible spectral range and the near infrared. As regards the efficiency of silicon diodes emitting red light, researchers from Karlsruhe are already top in the world. “Controlled manufacture of diodes emitting multicolor light, however, is an absolutely novelty,” explains Florian Maier-Flaig, scientist of the Light Technology Institute (LTI) of KIT and doctoral student of the Karlsruhe School of Optics and Photonics (KSOP). KIT scientists specifically adjust the color of the light emitted by the diodes by separating nanoparticles depending on their size. “Moreover, our light-emitting diodes have a surprising long-term stability that has not been reached before,” Maier-Flaig reports. The increased service life of the components in operation is due to the use of nanoparticles of one size only. This enhances the stability of the sensitive thin-film components. Short circuits due to oversized particles are excluded.
The development made by the researchers from Karlsruhe and Toronto is also characterized by an impressing homogeneity of the luminous areas. The KIT researchers are among the few teams in the world that know how to manufacture such devices. “With the liquid-processed silicon LEDs that may potentially be produced on large areas as well as at low costs, the nanoparticle community enters new territory, the associated potentials of which can hardly be estimated today. But presumably, textbooks about semiconductor components have to be rewritten,” says Geoffrey A. Ozin, who is presently working as a KIT distinguished research fellow at KIT’s Center for Functional Nanostructures (CFN).
The SiLEDs also have the advantage that they do not contain any heavy metals.
The Latest Bing News on:
Silicon nanocrystal LEDs
- 'World's purest silicon' could lead to 1st million-qubit quantum computing chipson May 7, 2024 at 2:00 am
Scientists engineer the 'purest ever silicon' to build reliable qubits that can be manufactured to the size of a pinhead on a chip and power million-qubit quantum computers in the future.
- SiliconCore Technologyon April 29, 2024 at 1:23 pm
SiliconCore Technology is a silicon based technology provider offering solutions for fine pitch LED display panels for indoor and outdoor applications, as well as semiconductor products. By clicking ...
- The 11 Best LED Strip Lights to Add a Little RGB to Your Lifeon April 14, 2024 at 9:30 am
To make for a more enjoyable experience, those tiny LEDs live in a sturdy silicone wrap that features a milky finish. This extra diffusion creates a gentle glow and may even reduce eye strain.
- Meet the 19-year-old From Silicon Valley Leading the Youth-Led Charge on AIon April 9, 2024 at 5:00 pm
In 2020, at the age of 15, the San José native founded Encode Justice, a youth-led group pushing policymakers and AI companies to put people at the center of the AI revolution. Plus, a package of ...
- Led by Musk, Silicon Valley inches to the righton March 9, 2024 at 7:41 pm
Since his tumultuous takeover of Twitter, Elon Musk has made an unabashed turn to the right politically, defying the orthodoxy that Silicon Valley is a citadel of well-heeled liberals beholden to ...
- Silicon Valley Wants To Change The World, Againon July 20, 2023 at 7:00 am
This continued the streak of world-changing technologies that Silicon Valley companies, led by brilliant engineers, helped forever alter the world. In early 2000, Steve Jobs and Apple introduced ...
- Silicon Spin-LED (IMAGE)on September 30, 2021 at 8:32 am
Electrical injection of spin-polarized electrons into silicon has proven elusive ... The illustration shows the surface-emitting LEDs used in this study.
- silicon LEDon December 29, 2020 at 4:00 pm
But while a simple LED costs pennies, that WS2812 or other fancy device is a bit expensive because internally it’s a hybrid of a silicon controller chip and several LEDs made from other ...
- Apple Siliconon December 12, 2020 at 3:33 pm
Apple Silicon doesn't refer to a specific chipset or processor but to the company's custom silicon as a whole. Its development lets the company focus on performance and vertical integration across ...
- Know Thy LEDon August 8, 2017 at 12:15 am
The first official LED was created in 1927 by Russian inventor ... was the first to report the phenomenon in 1907. He found that silicon carbide would glow with a yellowish light when a potential ...
The Latest Google Headlines on:
Silicon nanocrystal LEDs
[google_news title=”” keyword=”silicon nanocrystal LEDs” num_posts=”10″ blurb_length=”0″ show_thumb=”left”] [/vc_column_text]The Latest Bing News on:
SiLEDs
- Naira slides by 4.6% against dollar at official marketon May 8, 2024 at 12:27 am
The naira on Tuesday depreciated at the official market, trading at N1,416.57 to the dollar. Data from the official trading platform ...
- Nintendo Teases Long-Awaited Switch Successor as Profit Slideson May 7, 2024 at 6:22 pm
Nintendo Co. said it will announce a successor to its seven-year-old Switch game console, after forecasting a major profit decline for the current fiscal year.
- Astera Labs slides despite strong Q1 results, guidanceon May 7, 2024 at 1:23 pm
Astera Labs (ALAB) shares fell 15% in late-trading on Tuesday after the semiconductor firm reported first quarter results and guidance.
- Coupang Slides After Quarterly Profit Misses Estimateson May 7, 2024 at 12:54 pm
(Bloomberg) -- Coupang Inc., facing mounting competition in e-commerce, declined in late trading after first-quarter earnings came in shy of analysts’ estimates. Most Read from Bloomberg Trump Judge ...
- First Watch's traffic slides in Q1, but don't expect price-off specials to followon May 7, 2024 at 12:47 pm
Management at the daytime dining chain said it will focus instead on bringing back strong customer lures from the past.
- Slides deploy, passengers evacuate when smoke begins upon landing at Sea-Tacon May 7, 2024 at 9:07 am
SEATAC, Wash. — Passengers who safely landed at Sea-Tac Airport Monday night after a trip to Cancun had some unexpected excitement. Delta flight 604 arrived in Seattle at about 9:35 p.m. After landing ...
- Oil slides as easing supply concerns overshadow Middle East tensionson May 7, 2024 at 8:36 am
Oil prices steadied on Tuesday as easing supply concerns and signs of weakening demand countered fears of escalation in the Middle East. Brent crude futures fell 36 cents, or 0.4%, to $82.97 a barrel ...
- EV maker Lucid slides on worse-than-expected quarterly losson May 7, 2024 at 7:04 am
Lucid Group Inc. revealed a wider-than-expected loss to start the year as the company contends with production challenges and uneven demand for high-end electric vehicles.
- Palantir Stock Slides, Despite AI Boom Propelling Growthon May 7, 2024 at 5:33 am
Palantir Technologies shares are dropping, despite the data-analytics company reporting stronger-than-expected revenue in its commercial business, propelled by the AI boom. Palantir stock fell more ...
- Disney stock slides on revenue and streaming misseson May 7, 2024 at 5:11 am
Disney beat Wall Street's earnings forecasts, but shares fell ahead of the bell on a slowdown in streaming subscribers and a narrow revenue miss.
The Latest Google Headlines on:
SiLEDs
[google_news title=”” keyword=”SiLEDs” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]