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Technology Stocks : OLED Universal Display Corp -- Ignore unavailable to you. Want to Upgrade?

To: occams_phasor who wrote (29495)	5/25/2025 9:48:11 AM
From: slacker711	4 Recommendations Recommended By Cooters occams_phasor oled2b scsteve Read Replies (1) \| Respond to of 29721

The key value to a phosphorescent blue is getting better power efficiency without adding a very small amount of cost. Once you start adding layers, it substantially lowers the throughput of an OLED line and makes the value proposition much smaller. Here's the process to getting blue lifetimes equivalent to green from the link. The team reported on this last year, and they have since been putting this effect together with other approaches to finally produce a blue PHOLED that can last as long and burn as bright as a green one. These are the highlights of the design: Two light-emitting layers (a tandem OLED): This cuts the light-emitting burden of each layer in half, reducing the odds that two excitons merge. Adding a layer that helps the excitons resonate with surface plasmons near both electrodes, so that both emitting layers have access to the fast lane The whole structure is an optical cavity, in which blue light resonates between the two mirror-like electrodes. This pushes the color of the photons deeper into the blue range. The fact that Forrest thinks you need to do all of this to get green lifetimes means that we are not particularly close to being able to do that with a standard RGB OLED. The one saving grace is that we don't necessarily need a blue that matches green lifetimes.