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General information

  • Name: 5CzBN
  • Full name: 2,3,4,5,6-Penta(carbazol-9-yl)benzonitrile
  • CAS number: 1469700-24-0
  • Chemical formula: C67H40N6
  • Molecular weight: 929.10 g/mol
  • Absorption: λmax = 325 nm, 348 nm and 420 nm in DCM
  • Photoluminescence: λmax = 488 nm in Toluene
  • HOMO/LUMO: HOMO = 5.6 eV, LUMO = 2.7 eV
  • Synonyms: 5CzCN, 2,3,4,5,6-Penta(9H-carbazol-9-yl)benzonitrile
  • Classification: Organic light-emitting diodes, Emmiting layer materials (EML), TADF materials, Blue fluorescent dopant materials
  • Purity: Sublimed: >99% (1H NMR)
  • Melting point: Tg = 318 °C
  • Appearance: Yellow powder/crystals

5CzBN: Advanced Blue Fluorescent Dopant for OLED Applications

5CzBN, scientifically named 2,3,4,5,6-Penta(carbazol-9-yl)benzonitrile and identified by CAS number 1469700-24-0, represents a milestone in the field of Organic Light-Emitting Diodes (OLEDs). With a molecular formula of C67H40N6, this compound is pivotal as an emitting layer material (EML) and for Thermally Activated Delayed Fluorescence (TADF) applications. Characterized by its remarkable purity of over 99% as verified by 1H NMR, alongside strategic HOMO and LUMO levels, 5CzBN is engineered to optimize the performance and efficiency of OLED devices, specifically serving as a blue fluorescent dopant material.

The Molecular Structure and Properties of 5CzBN

5CzBN’s intricate molecular architecture, featuring five carbazole units attached to a central benzonitrile core, is optimized for advanced OLED applications. This unique structure facilitates efficient energy transfer and strong blue emission, with absorption peaks at λmax = 325 nm, 348 nm, and 420 nm in dichloromethane (DCM), and a photoluminescence peak at λmax = 488 nm in toluene. The tailored energy levels, with a HOMO of 5.6 eV and a LUMO of 2.7 eV, ensure compatibility with a wide range of host materials, making 5CzBN a versatile choice for enhancing blue light emission in OLEDs.

Key Features of 5CzBN

  • Enhanced Blue Fluorescence: 5CzBN is celebrated for its exceptional capacity to generate intense blue fluorescence, a fundamental attribute for attaining unparalleled color purity and luminous efficiency in OLED displays and lighting systems. This compound’s superior photophysical properties facilitate the production of vivid, deep-blue hues, essential for broadening the color gamut and enhancing the visual appeal of OLED-based technologies. Its contribution to blue emission not only meets but exceeds industry standards, setting new benchmarks for display clarity and color accuracy. Noctiluca’s commitment to advancing OLED materials is exemplified by our provision of 5CzBN, ensuring that manufacturers can leverage this material for high-performance applications requiring superior blue light emission.
  • Versatility in TADF Applications: 5CzBN emerges as a pivotal component in the realm of Thermally Activated Delayed Fluorescence (TADF) materials, playing an indispensable role in crafting energy-efficient OLED devices. Its unique molecular design enables effective electron-hole recombination via thermally activated processes, a mechanism that significantly amplifies device efficiency and operational lifespan. This enhancement of TADF properties contributes to reducing energy consumption while maintaining high emission intensities, paving the way for the development of next-generation OLEDs that combine ecological sustainability with superior performance. As a leading TADF material supplier, Noctiluca is at the forefront of integrating 5CzBN into cutting-edge OLED technologies, supporting our partners in achieving groundbreaking advancements in device efficiency and sustainability.
  • Stability Under Operational Conditions: 5CzBN distinguishes itself not only through its photophysical properties but also through its exceptional stability under the rigorous operational conditions typical of OLED devices. This stability is critical for maintaining the integrity and performance of the blue emission over time, ensuring that OLED displays and lighting applications retain their luminosity and efficiency throughout their lifecycle. The robust molecular structure of 5CzBN resists degradation, a pivotal factor for the longevity and reliability of OLED technologies, thereby supporting Noctiluca’s commitment to providing materials that meet the highest standards of durability and performance in the industry.

The Role of 5CzBN in Advanced OLEDs

5CzBN is instrumental in the progression of OLED technology, particularly for devices requiring high-efficiency blue emission. Its dual function as an EML and TADF material enhances device architecture by improving energy transfer mechanisms and light emission efficiency. This advancement is essential for developing next-generation OLED displays that offer vibrant colors, energy savings, and extended lifespans.


5CzBN exemplifies Noctiluca’s distinguished advancements in the field of OLED material science, offering a pivotal solution for the sophisticated needs of the OLED industry. Our capability in delivering high-grade 5CzBN, augmented by our comprehensive portfolio of chemical manufacturing and analytical services, positions Noctiluca as an innovator in the development of advanced OLED technologies. As a contract research organization (CRO) with a specific focus on Thermally Activated Delayed Fluorescence (TADF) materials, we provide an integrated suite of CRO services that underscore our commitment to pioneering in the OLED sector. Through our strategic emphasis on advanced materials such as 5CzBN, we are driving the evolution of display technology, ensuring our partners achieve excellence in device performance, visual integrity, and environmental sustainability.


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