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General information

  • Name: 4CzBN
  • Full name: 2,3,5,6-Tetrakis(carbazol-9-yl)benzonitrile
  • CAS number: N/A
  • Chemical formula: C55H33N5
  • Molecular weight: 763.90 g/mol
  • Absorption: λmax = 334 nm, 403 nm in Toluene
  • Photoluminescence: λmax = 443 nm in Toluene
  • HOMO/LUMO: HOMO = 5.8 eV, LUMO = 2.8 eV
  • Synonyms: -
  • Classification: Organic light-emitting diodes, Emmiting layer materials (EML), TADF materials, Blue fluorescent dopant materials
  • Purity: Sublimed: >99% (1H NMR)
  • Melting point: Td = 455 °C
  • Appearance: Lime-yellow powder/crystals

4CzBN >99% – High-Purity Blue TADF Dopant for Advanced OLEDs

At Noctiluca,  we proudly offer 4CzBN, a crucial material for the advancement of OLED (organic light-emitting diode) technology. Formally known as 2,3,5,6-Tetrakis(carbazol-9-yl)benzonitrile, this compound, identified by CAS number 1996609-93-8 and molecular formula C55H33N5, is meticulously crafted to meet the highest standards of research and industrial applications. With a superior purity of >99% (1H NMR), 4CzBN ensures exceptional performance in advanced OLED applications. Our dedication to quality guarantees that 4CzBN supports unmatched efficiency and longevity in electronic devices, making it indispensable for modern technology.

The Molecular Structure and Properties of 4CzBN

4CzBN, also known as 2,3,5,6-Tetrakis(carbazol-9-yl)benzonitrile, is distinguished by its advanced photophysical properties. This green-yellow powder compound exhibits absorption maxima at λmax = 334 nm and 403 nm in toluene and photoluminescence at λmax = 443 nm in toluene. The molecular structure includes four carbazole groups attached to a benzonitrile core, enhancing its charge transport and blue fluorescent capabilities with the simultaneous occurrence of the TADF phenomenon. These properties, along with its high thermal stability with a decomposition temperature (Td) of 455 °C, make 4CzBN an excellent choice for creating efficient and reliable OLEDs.

Key Features of 4CzBN

  • Exceptional Purity and Quality: Our 4CzBN, with a purity level of >99%, is produced through a stringent sublimation process. This high level of purity ensures consistent and reliable material quality, which is essential for high-performance OLED applications. The exceptional purity of 4CzBN is critical for developing effective emissive and charge transport layers.
  • Optimized for OLED Applications: 4CzBN is functioning effectively as a blue fluorescent dopant and TADF emitter. Its integration into emitting layer (EML) results in devices with superior energy conversion efficiency and extended operational lifespans. This versatility is vital for advancing OLED technology, making 4CzBN a preferred choice for developers aiming to innovate in electronic applications.
  • Superior Photophysical Attributes: Featuring absorption maxima at λmax = 334 nm and 403 nm and photoluminescence at λmax = 443 nm, TADF phenomenon with small ΔEST value, 4CzBN offers outstanding photophysical properties. These characteristics are crucial for maximizing energy transfer in OLEDs, aiding in the creation of highly efficient, next-generation electronic devices.
  • High Thermal Stability: 4CzBN is designed to maintain high performance even at elevated temperatures, with a decomposition temperature (Td) of 455 °C. This impressive thermal stability ensures that 4CzBN retains its structural integrity and electronic properties under demanding conditions, making it a reliable choice for OLED applications requiring long-term consistency.
  • Versatile Processing Capabilities: 4CzBN’s excellent solubility and adaptability make it suitable for various fabrication processes, including solution processing methods like spin-coating and inkjet printing. This flexibility facilitates its integration into different manufacturing workflows, enabling the production of devices with enhanced efficiency and uniformity. Whether in research environments or large-scale production, 4CzBN’s processability supports innovative design and application in OLEDs.

The Role of 4CzBN in Advanced OLEDs

4CzBN, chemically identified as C55H33N5, plays a pivotal role in the development of high-performance OLED technology. By providing efficient charge transport and emission capabilities, 4CzBN significantly enhances the light-emitting and energy conversion properties of devices. Its effectiveness as a blue fluorescent dopant and TADF material ensures vibrant color purity and brightness, which are essential for developing high-definition displays. Additionally, its robust thermal stability and superior photophysical properties support the creation of durable and reliable electronic devices. The unique combination of these properties makes 4CzBN a critical asset in advancing OLED technology and expanding its applications in modern electronics.


4CzBN >99% exemplifies Noctiluca’s commitment to delivering superior chemical materials, underscoring our dedication to advancing material science for sustainable and efficient OLED applications. As a leading OLED materials supplier and contract research organization (CRO), we are devoted to providing our clients with premium-grade materials that foster technological and innovative progress.

Contact us today to discover how our high-purity 4CzBN can meet your scientific and industrial needs, ensuring your projects achieve the highest standards of quality and performance, or to inquire about bulk orders of this compound.

Any questions? Contact us!