The content on our website is provided solely for general informational purposes.  It should not be considered, nor is it intended to provide advice or recommendations for the purchase, sale, or trade of any products or services.  Importantly, the information presented does not constitute an offer to sell or a solicitation of an offer to buy any product.

Please be aware that the availability of our products may vary across different markets due to regulatory restrictions or other considerations. Consequently, not all products or services may be available in your region or country. For specific inquiries regarding the availability and pricing of any product, please contact us at

General information

  • Name: CBP
  • Full name: 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl
  • CAS number: 58328-31-7
  • Chemical formula: C36H24N2
  • Molecular weight: 484.59 g/mol
  • Absorption: λmax = 292, 318 nm in THF
  • Photoluminescence: λmax = 369 nm in THF
  • HOMO/LUMO: HOMO = 6.0 eV, LUMO = 2.9 eV
  • Synonyms: DCBP, 4,4′-Bis(9-carbazolyl)-1,1′-biphenyl, 4,4-N,N′-Dicarbazole-1,1′-biphenyl
  • Classification: Organic light-emitting diodes, Light-emitting diodes, Hole injection layer materials (HIL), Hole transport layer materials (HTL), Hole blocking layer materials (HBL), Host materials, TADF materials
  • Purity: Sublimed: >99.5% (HPLC)
  • Melting point: 281 - 285 °C
  • Appearance: White powder

CBP: High-Purity Host Material for Advanced OLEDs

At Noctiluca, we proudly offer CBP >99.5%, a critical material for the advancement of OLED (organic light-emitting diode) technology. Formally known as 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl, this compound, identified by CAS number 58328-31-7 and molecular formula C36H24N2, is designed to meet the highest standards of research and industrial application. With a superior purity of >99.5% (HPLC), CBP ensures optimal performance in advanced OLED applications. Our commitment to quality guarantees that CBP supports unparalleled efficiency and durability in OLED devices, making it indispensable for modern electronic advancements.

The Molecular Structure and Properties of CBP

CBP, also known by its synonyms DCBP or4,4-N,N′-Dicarbazole-1,1′-biphenyl, is renowned for its exceptional photophysical properties. The key feature of the host material is to have a higher triplet energy than the emitter to enable efficient energy transfer between their multiplet states. CBP with its ET = 2.55 eV is an ideal candidate for this, making it a key host material for OLEDs. The molecular structure, featuring a biphenyl core with carbazole substituents, provides excellent thermal stability with a melting point of 281 – 285 °C and ability to form stable amorphous films. These properties make CBP ideal for creating highly efficient and stable OLEDs.

Key Features of CBP

  • High Purity and Quality: Our CBP boasts a purity level of >99.5% as verified by HPLC, achieved through meticulous sublimation. This high level of purity ensures the material’s consistency and reliability, forming the foundation of high-quality OLED applications. The compound’s exceptional purity is crucial for the development of high-performance emissive and transport layers.
  • Specialized for OLED Applications: CBP excels as a  functioning effectively host material. Its simple molecular structure with electron-rich carbazole units and triplet energy of 2.55 eVresults in displays with superior energy conversion efficiency and longevity. This properties drives significant advancements in OLED technology, making it a preferred choice for developers aiming to enhance display performance.
  • High Thermal Stability: CBP is engineered to withstand high temperatures, with a melting point of 281 – 285 °C, ensuring its suitability for a wide range of operational conditions. This thermal stability enhances the durability and reliability of OLED panels, making CBP an essential material for long-lasting display technologies.
  • Versatility in Device Fabrication: CBP’s excellent solubility and processability make it highly suitable for various OLED fabrication techniques. Its versatility ensures that CBP can be effectively utilized in a variety of manufacturing processes, enhancing its applicability across different OLED production methods.

The Role of CBP in Advanced OLEDs

CBP >99.5%, chemically known as C36H24N2, is essential for advancing OLED technology. By facilitating the formation of efficient emissive and transport layers, this compound significantly improves the light emission and overall performance of OLED devices. The integration of CBP in HIL, HTL, and HBL formulations is crucial for achieving superior energy conversion efficiencies, vital for developing next-generation display technologies. Additionally, its use as a host material enhances the stability and durability of OLED products, making it indispensable for developers seeking to optimize OLED technology. CBP’s unique properties support a broad spectrum of applications, driving innovation in the optoelectronics industry and contributing to the development of high-tech solutions.


CBP >99.5% exemplifies Noctiluca’s commitment to providing top-tier 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 committed to supplying our clients with superior-grade materials that drive technological and innovative progress.

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

Any questions? Contact us!