In a remarkable breakthrough in their research, Polar Light Technologies has achieved red light of 625 nm based on the company’s non-etching bottom-up concept. This means Polar Light Technologies have reached red, green, and blue pyramidal microLEDs using the same material compound.

The pyramidal design has the ability to be manufacturable while maintaining excellent microLED performance, laying the foundation for monolithic RGB displays.

This milestone marks the culmination of years of rigorous research and development, truly enabling spatial computing and next-generation panel displays.

Red without compromise
Blue and green MicroLEDs have been in the market for years, but reaching a red colour has been difficult due to fundamental challenges in the material properties. There are several workarounds or alternatives for reaching a red colour, but they all come with some compromises, such as efficiency, manufacturability, or the need to integrate with other material systems.

“Pursuing Polar Lights’ innovative pyramidal LED concept has been about overcoming those challenges without compromises. Today, thanks to a great tech team, we have succeeded in realizing the red-emitting microLEDs based on our innovative pyramidal structure”, says Lisa Rullik, CTO of Polar Light Technologies.

Unique pyramidal structures
Polar Light Technologies’ microLED is composed of pyramid shapes that are built with a novel bottom-up approach, a technology that comes with unique benefits:

The inevitable strain in the lattice-mismatched InGaN/GaN structures is reduced, which is important to be able to manufacture blue, green, and red microLEDs with the same material system, that is, to build monolithic RGB.
It gives a unique possibility to integrate the frontplane with a backplane
No etching is needed, which means:
Performance is maintained also for smaller dimensions since no etching damages occur
Enables even sub-µm LEDs – nanoLEDs
Easier to manufacture and integrate with CMOS and TFT
Narrow emission cone: Lambertian light lobe from the emitter, which is important for microprojectors
With these unique benefits, the microLED from Polar Light Technologies solves key challenges in bringing the technology to the market.

Performance, manufacturability and nanoLED
Polar Light Technologies’ same-compound-based microLED offers high performance and excellent manufacturability. Its very small dimensions and narrow emission cone further enhance the offer. The technology also opens up for nanoLED applications – as soon as the rest of the display technology catches up.

“Our technology addresses microLED challenges in a way that has never been done before,” says Oskar Fajerson, CEO of Polar Light Technologies. “Now we’re moving towards commercialization of this groundbreaking technology, focusing on putting products on the market.”

TrendForce 2024 Micro LED Market Trend and Technology Cost Analysis
Release: 31 May / 30 November 2024
Language: Traditional Chinese / English
Format: PDF
Page: 160-180