OLED Display Materials

OLED Display Materials

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OLED display materials have revolutionized the flat-panel display industry since 2006. DuPont has emerged as a significant leader in the OLED market by developing high-quality red, green, and blue emissive materials that enhance OLED performance across various devices. From smartphones and tablets to TVs and wearables, OLED displays are also being adapted for lighting and automotive applications.

Driving Development of OLED Display Materials

For flat-panel display manufacturers, DuPont remains a trusted partner by continuously advancing OLED technology. Our vast experience in active-matrix OLED (AMOLED) materials translates into helping developers meet their product and market-readiness goals.

DuPont’s Contributions to OLED Evolution

In the past decade, DuPont's R&D team has introduced groundbreaking materials like the red phosphorescent OLED host. This innovation launched the first mass-produced OLED device using our materials, setting industry standards. Our AMOLED materials now feature high efficiency, low driving voltage, high refractive index, and extended lifetime, making them ideal for next-gen OLED displays.

Wide Range of Product Offerings

• Emission Layer Material
  • Fluorescent host and Dopant
    • Red/Green/Blue
  • Phosphorescent host
    • Red/Green
• Common layer materials
  • Prime layer
  • Buffer layer
  • Electron injection layer (EIL)
  • Electron transport layer (ETL)
  • Hole transport layer (HTL)

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History and Invention of OLED

Organic Light Emitting Diode (OLED) technology has rapidly evolved since its invention in 1987. Known for superior picture quality, OLEDs use organic (carbon-containing) compounds that emit light when an electrical current passes through. Although OLEDs are more expensive than their LCD counterparts, they provide higher color contrast, larger viewing angles, and superior flexibility.

What is OLED?

Organic Light Emitting Diode, abbreviated as OLED, leverages organic molecules to emit light upon the application of electrical current. OLED displays are exceptional for their higher color contrast and wider viewing angles compared to traditional Liquid Crystal Displays (LCD). These features make OLED the preferred choice for high-end electronics like premium televisions and smartphones. OLED panels are also lightweight and flexible, contributing to innovative applications such as foldable phones and curved displays.

Types of OLED Displays

OLED technology encompasses various kinds, including Passive-Matrix OLED (PMOLED) and Active-Matrix OLED (AMOLED). AMOLEDs employ thin film transistors (TFTs), making them more energy-efficient and suitable for larger screens. Phosphorescent OLEDs offer better efficiency than fluorescent OLEDs, thanks to their slow energy dissipation. Another variant, PLED, uses light-emitting polymers rather than organic molecules. OLEDs often use glass substrates, but plastic substrates are increasingly popular for flexible OLEDs.

Industrial Adoption and Advances

Since its invention in 1987 by Kodak chemists Ching Tang and Steven Van Slyke, OLED technology has overcome several hurdles to reach mass production. Commercial production took off in the mid-1990s, with the first OLED TV being released in 2013. Companies like LG and Samsung have pioneered the commercial applications of OLED displays, culminating in innovations like foldable phones and flexible screens.

OLED vs. LCD

When comparing OLED to LCD, OLED offers better picture quality, viewing angles, and energy efficiency. However, LCDs have higher maximum luminance, making them more suitable for bright environments. Both technologies can achieve 4K resolution, but OLED's ability to produce true blacks and handle each pixel individually gives it an edge in producing superior picture quality.

Benefits of OLED Technology

OLED technology provides several benefits: unmatched color contrast, wide viewing angles, and energy efficiency. Unlike LCDs, which use a backlight, OLEDs can achieve true black by turning off pixels individually. This feature allows for precise brightness control and excellent color accuracy. Additionally, OLEDs offer flexibility, opening the door to new design possibilities, such as rollable and foldable displays.

Commercial Applications Beyond Displays

Besides being a staple in high-end electronics, OLEDs have applications in lighting. Companies like Philips Lighting use OLED technology for lighting panels under the Lumiblade brand. Universal Display Corporation holds most of the patents related to OLED, making significant strides in this cutting-edge technology.

Early Discoveries and Modern Innovations

French chemist André Bernanos initially discovered the electroluminescent properties of organic compounds in 1950. However, it wasn't until 1987 that modern OLED screens were developed by Ching Tang and Steven Van Slyke. Companies like Pioneer began using OLED in car displays, eventually leading to mass production by giants like Sanyo Electric, LG, NEC, and Samsung by the year 2000. Today, OLED remains a cornerstone of modern display technology.

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