The pursuit of enhanced efficiency, brightness, and longevity in Organic Light-Emitting Diode (OLED) technology relies heavily on the precise selection and implementation of advanced organic semiconductor materials. N1-Phenyl-N4,N4-bis(4-(phenyl(m-tolyl)amino)phenyl)-N1-(m-tolyl)benzene-1,4-diamine, identified by CAS number 124729-98-2 and commonly known as m-MTDATA, is a pivotal compound that plays a crucial role in optimizing OLED device architecture, particularly as a Hole Injection Layer (HIL) and Hole Transport Layer (HTL) material.

Understanding the Technical Specifications of m-MTDATA

m-MTDATA is a triphenylamine derivative characterized by its specific molecular formula (C57H48N4) and a molecular weight of approximately 789.02 g/mol. Its performance in OLED devices is closely tied to its electronic and physical properties:

  • Low Ionization Potential: m-MTDATA possesses a very low solid-state ionization potential, which is key to its function as an effective HIL. This property allows for a reduced energy barrier for hole injection from the anode (e.g., ITO) into the organic layers.
  • Amorphous Film Formation: The material is known to form high-quality amorphous films, which are crucial for uniform charge carrier transport and preventing the formation of crystalline domains that can degrade device performance and stability.
  • Absorption and Emission Spectra: Typically, m-MTDATA exhibits absorption maxima (λmax) around 312 nm and 342 nm in THF, and photoluminescence emission maxima (λmax) at 425 nm in THF, indicating its interaction with light and its electronic transitions.
  • Energy Levels (HOMO/LUMO): For device engineers, the HOMO (Highest Occupied Molecular Orbital) and LUMO (Lowest Unoccupied Molecular Orbital) energy levels are critical. m-MTDATA typically has a HOMO level of approximately 5.1 eV and a LUMO level of 2.0 eV, facilitating efficient hole injection and transport.
  • Purity: For demanding OLED applications, high purity is paramount. Sublimed grades of m-MTDATA, often exceeding 98% or 99% purity, are commercially available from specialized manufacturers.

Functional Advantages in OLED Devices

The technical specifications of m-MTDATA translate directly into tangible performance benefits when integrated into OLED devices:

  • Reduced Driving Voltage: By improving hole injection efficiency, m-MTDATA significantly lowers the voltage required to operate the OLED, leading to enhanced power efficiency and reduced heat generation.
  • Improved Current and Power Efficiency: Efficient charge injection and transport balance leads to higher luminous efficacy (cd/A) and power efficiency (lm/W).
  • Enhanced Device Stability and Lifetime: The consistent amorphous film formation and inherent stability of high-purity m-MTDATA contribute to a longer operational lifespan for OLED devices.

Procurement and Partnership

For researchers and manufacturers looking to leverage these technical advantages, sourcing m-MTDATA from reputable suppliers is essential. Manufacturers like Ningbo Inno Pharmchem Co., Ltd. specialize in providing high-purity OLED materials, offering competitive pricing and technical support. If you are considering purchasing m-MTDATA or require a detailed quotation for your OLED development, contact us to ensure you receive a quality product that meets your exacting technical requirements.