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General information

  • Name: BSB
  • Full name: 4,4'-Di(triphenylsilyl)-biphenyl
  • CAS number: 18826-13-6
  • Chemical formula: C48H38Si2
  • Molecular weight: 670.99 g/mol
  • Absorption: λmax = 271 nm in DCM
  • Photoluminescence: λmax = 432 nm in DCM
  • HOMO/LUMO: HOMO = 6.5 eV, LUMO = 2.3 eV
  • Synonyms: 4,4'-Bis-triphenylsilanyl-biphenyl, 4,4'-Di(triphenylsilyl)-biphenyl
  • Classification: Organic light-emitting diodes, Electron transport layer materials (ETL), Hole blocking layer materials (HBL), Host materials, Semiconducting small molecules
  • Purity: Sublimed: >99.0% (HPLC)
  • Melting point: Tg = 100 °C
  • Appearance: White powder/crystals

BSB: Advanced Material for OLED Performance Enhancement

BSB, or 4,4′-Di(triphenylsilyl)-biphenyl, CAS number 18826-13-6, chemical structure C48H38Si2, represents a significant breakthrough in the field of organic light-emitting diodes (OLEDs). BSB is a versatile compound, serving as an essential component across various OLED applications including Electron Transport Layer (ETL), Hole Blocking Layer (HBL), and as a host material for semiconducting small molecules. This compound’s high sublimation purity, over 99.0% as certified by HPLC, alongside its balanced HOMO and LUMO levels, positions it as a key material in the development of high-efficiency, durable OLED devices.

The Molecular Structure and Properties of BSB

BSB’s unique molecular architecture, featuring two triphenylsilyl groups attached to a biphenyl core, is meticulously designed to optimize OLED device performance. This structural arrangement enhances electron mobility and hole blocking efficiency, critical for the stability and luminance of OLED displays. The HOMO level of 6.5 eV and LUMO of 2.3 eV ensure BSB’s effective integration into OLED matrices, contributing to devices with improved brightness, energy efficiency, and extended operational lifespan.

Key Features of BSB

  • Optimal Electron Transport and Hole Blocking: BSB excels in facilitating electron transport and providing effective hole blocking, crucial for enhancing OLED efficiency and display longevity. Its role in ETL and HBL applications underlines its importance in achieving high device performance and energy savings.
  • Versatility Across OLED Configurations: The chemical and electronic adaptability of BSB allows for its application in a broad spectrum of OLED technologies. From phosphorescent host materials to advanced transport layer components, BSB’s versatility is instrumental in pushing the envelope of OLED innovation.
  • High Thermal and Photostability: BSB demonstrates exceptional thermal and photostability, essential for maintaining the integrity of OLED devices under varying operational conditions. This stability ensures that the material’s performance remains consistent over time, contributing to the longevity and reliability of OLED displays. The inherent robustness of BSB against thermal degradation and photo-induced damage allows for its use in applications where long-term durability is paramount, further solidifying its role as a foundational component in the development of advanced OLED technologies.

The Role of BSB in Advanced OLEDs

BSB is pivotal in advancing OLED technology, markedly enhancing device efficiency, stability, and display quality. Its integration into TADF and phosphorescent materials significantly boosts light emission efficiency, producing OLED displays with exceptional brightness and color saturation. This advancement is crucial for propelling OLED technology forward, supporting the development of displays that are more vibrant, durable, and energy-efficient. Moreover, BSB’s ability to optimize electron transport and hole blocking directly contributes to improved operational performance and energy savings in OLED devices, underscoring its value in pushing the boundaries of organic electronics.


BSB underscores Noctiluca’s commitment to excellence in OLED material science, delivering innovative solutions to address the sophisticated demands of OLED technology. Our specialization in providing high-purity BSB, alongside our broad array of contract research organization (CRO) services and chemical manufacturing expertise, reinforces Noctiluca’s position as a pivotal partner within the OLED sector. Through our dedicated efforts to propel OLED technology forward with superior materials like BSB, Noctiluca is defining new industry standards. This initiative ensures our partners and clients achieve breakthroughs in device performance, energy efficiency, and visual fidelity, affirming Noctiluca’s influential role in advancing display technology.

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