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DEEP RESEARCH · DUKSAN NEOLUX/OLED MATERIALS

[Duksan Neolux] Research Note

A materials-company analysis of Black PDL, CoE adoption, and the recycling risk in OLED materials

Published: 2025-07-31 · OLED materials/competitive landscape · Naver Blog

Investment decisions are your responsibility. This material is research and is not a buy or sell recommendation.

0. Bottom line first

The core of Duksan Neolux is Black PDL. CoE removes the polarizer, improving power and thickness, and Black PDL replaces the anti-reflection function that the polarizer used to perform. The long-term risk is OLED material recycling, which can structurally reduce demand for new materials.

1. CoE and the role of Black PDL

Official fact: CoE removes the OLED polarizer and forms the color filter on the encapsulation layer. The source cites up to 33% higher light transmittance and up to 25% lower power for the same brightness.

Black PDL defines pixel boundaries while absorbing external light to reduce reflection. CoE adoption therefore directly supports Black PDL demand. CoE was commercialized in the Galaxy Z Fold 3 in 2021 and is spreading mainly through foldables.

Black PDL inside CoEThe core material that fills the role left by the removed polarizer
Legacy OLEDPolarizer blocks reflection
CoEPolarizer removed
Black PDLPixel definition + light absorption
EffectBrightness, power, thickness
CoE adoption raises Black PDL's strategic material status.

2. Duksan Neolux's moat

Official fact: The source describes Duksan Neolux as the first company to develop and mass-produce Black PDL. It began supplying Samsung Display in the third quarter of 2021, and company IR materials cite 232 PR-material patent applications including Black PDL.

Technology

First mass production

The company captured the Black PDL opportunity needed for CoE and secured early standards and customer relationships.

Yield

High entry barrier

The material must absorb light, define fine pixels, and withstand later high-temperature processes.

IP

Patent wall

232 PR-material patent applications act as a defensive barrier against followers.

3. Growth pipeline and structural headwind

Beyond Black PDL, the company has OLED emitting materials such as Red Host, Red Prime, Green Prime, and HTL. The source cites 1,315 HTL/Prime patents, 390 Host patents, and over 1,700 emitting-material patents. The next growth axes are blue phosphorescent host materials and OLED expansion into IT and automotive displays.

Official fact: In OLED vacuum thermal evaporation, the source says only 25-30% of input organic materials are used in actual products, while 70-75% are wasted. Samsung Display is cited as recovering and reusing 80% of QD ink in QD-OLED, saving more than KRW 10 billion annually.

Interpretation: One kilogram of recycled material can function like one kilogram less in new-material orders. Even if panel output grows, rising recycling rates can slow material-supplier revenue growth.

4. Global competition

CompanyCore moatStrategic focus
Duksan NeoluxBlack PDL technology and yield leadershipNiche dominance in enabling CoE transition
UDCPHOLED foundational patents, 6,000+ patentsLicensing and phosphorescent dopant sales
Idemitsu KosanBlue emitting-material technologySolving blue fluorescence and TADF challenges
Mercklivilux® full-stack portfolioOne-stop shop for OLED materials

5. Investment logic and risks

Bull Case

  • CoE spreads from foldables to conventional smartphones, increasing Black PDL demand.
  • Blue phosphorescent host development becomes the next growth axis.
  • OLED expansion into IT, notebooks, and automotive displays increases material usage.

Bear Case

  • Higher OLED material recycling rates reduce the TAM for new materials.
  • High dependence on Black PDL creates concentration risk if competitors achieve mass production.
  • Customer concentration around Samsung Display makes diversification important.

Sources

Naver original