Info
Info
News Article

Plessey Develops Native Red InGaN MicroLEDs On Silicon

News

Company can make native Blue, Green and Red InGaN material or tune wavelengths from 400 - 650 nm using its GaN on silicon platform

UK-based MicroLED company Plessey has successfully developed what it believes is the world's first InGaN on silicon-based Red LED.

InGaN-based Blue and Green LEDs are commercially available, Red LEDs are typically based on AlInGaP material or colour converted Red. For AR, achieving high efficiency ultra-fine pitch Red pixels (< 5 µm) remains elusive due to severe edge effects from AlInGaP material and cavity losses from colour conversion processes.

InGaN-based Red is attractive as it offers lower manufacturing costs, scalability to larger 200 mm or 300 mm wafers and better hot/cold factor over incumbent AlInGaP-based Red. However, achieving red spectral emission with InGaN material is challenging due to the high indium content inducing significant strain in the active region, subsequently reducing crystal quality and creating numerous defects.

Plessey has successfully overcome these challenges by using a proprietary strain engineered active region to create an efficient InGaN Red LED.

Plessey's InGaN Red microLEDs have a wavelength of 630 nm at 10 A/cm2, full width at half maximum of 50 nm, hot cold factor over 90 percent and higher efficiencies over conventional AlInGaP and colour converted Red at ultra-fine pixel pitches. With this result, Plessey now has the capability to manufacture native Blue, Green and Red InGaN material or tune wavelengths from 400 - 650 nm using its GaN on Silicon platform.

Wei Sin Tan, Director of Epitaxy and Advanced Product Development, at Plessey, said: “This is an exciting result as it creates a path towards low cost manufacturing of ultra-fine pitch and efficient Red InGaN pixels, which will accelerate the adoption of microLEDs in both AR microdisplays and mobile/large display applications. Our innovative solutions have once again proven Plessey's position as the world leader in microLED technology.”

Other recent milestones from Plessey includes the world's first wafer level bonded monolithic 3,000 ppi GaN on Silicon microLED emissive display hybridised to an active-matrix CMOS backplane; as well as native Blue and Green emission layers on the same wafer.



AngelTech Live III: Join us on 12 April 2021!

AngelTech Live III will be broadcast on 12 April 2021, 10am BST, rebroadcast on 14 April (10am CTT) and 16 April (10am PST) and will feature online versions of the market-leading physical events: CS International and PIC International PLUS a brand new Silicon Semiconductor International Track!

Thanks to the great diversity of the semiconductor industry, we are always chasing new markets and developing a range of exciting technologies.

2021 is no different. Over the last few months interest in deep-UV LEDs has rocketed, due to its capability to disinfect and sanitise areas and combat Covid-19. We shall consider a roadmap for this device, along with technologies for boosting its output.

We shall also look at microLEDs, a display with many wonderful attributes, identifying processes for handling the mass transfer of tiny emitters that hold the key to commercialisation of this technology.

We shall also discuss electrification of transportation, underpinned by wide bandgap power electronics and supported by blue lasers that are ideal for processing copper.

Additional areas we will cover include the development of GaN ICs, to improve the reach of power electronics; the great strides that have been made with gallium oxide; and a look at new materials, such as cubic GaN and AlScN.

Having attracted 1500 delegates over the last 2 online summits, the 3rd event promises to be even bigger and better – with 3 interactive sessions over 1 day and will once again prove to be a key event across the semiconductor and photonic integrated circuits calendar.

So make sure you sign up today and discover the latest cutting edge developments across the compound semiconductor and integrated photonics value chain.

REGISTER FOR FREE

VIEW SESSIONS

Info
×
Search the news archive

To close this popup you can press escape or click the close icon.
×
Logo
×
Register - Step 1

You may choose to subscribe to the Compound Semiconductor Magazine, the Compound Semiconductor Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in:
 
X
Info
X
Info
{taasPodcastNotification}
Live Event