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General information

  • Name: TPBi
  • Full name: 2,2',2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)
  • CAS number: 192198-85-9
  • Chemical formula: C45H30N6
  • Molecular weight: 654.76 g/mol
  • Absorption: λmax = 305 nm in THF
  • Photoluminescence: λmax = 370 nm in THF
  • HOMO/LUMO: HOMO = 6.2/6.7 eV, LUMO = 2.7 eV
  • Synonyms: 1,3,5-Tris(1-phenyl-1Hbenzimidazol-2-yl)benzene
  • Classification: Organic light-emitting diodes, Electron transport layer materials (ETL), Electron injection layer materials (EIL), Hole blocking layer materials (HBL), Emmiting layer materials (EML), Host materials, TADF materials
  • Purity: Sublimed: >99.5% (HPLC)
  • Melting point: 272 - 277 °C, TGA: >330 °C (0.5% weight loss)
  • Appearance: White powder

TPBi: A Versatile Organic Material for Electronics

The realm of organic electronics has witnessed the emergence of numerous materials that have revolutionized the industry. Among these, TPBi stands out as a versatile and efficient material, playing a pivotal role in the advancement of organic light-emitting diodes (OLEDs) and related technologies.

Understanding TPBi

2,2′,2″-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole), is a unique molecule composed of a benzene ring substituted with three benzimidazole phenyl derivatives. This configuration renders the molecule both rigid and electron-deficient, attributes that are crucial for its applications in optoelectronic devices.

Key Features of TPBi

  • Electron Transport Layer Material: electron-deficient nature makes it an ideal candidate for use as an electron transport layer (ETL) material in OLEDs and organic solar cells (OPVs).
  • Host Material for Dopants: TPBi has been recognized for its potential as a host material for both fluorescent and phosphorescent dopants, enhancing the performance of OLED devices.
  • Electron Injection & Hole Blocking: Beyond its role as an ETL, TPBi is also employed as an electron injection layer (EIL) material and a hole blocking layer (HBL) material, further testifying to its versatility.

The Role of TPBi in Advanced Organic Electronics

In the dynamic field of organic electronics, materials that offer both efficiency and versatility are in high demand. TPBi, with its unique molecular structure and electron-deficient nature, fits this bill perfectly. Its applications span from serving as an ETL in OLEDs to acting as a host material for various dopants. Moreover, its role in enhancing the performance and stability of OLED devices cannot be understated.


The organic electronics industry is continually evolving, driven by the quest for materials that can enhance device performance, longevity, and efficiency. TPBi, with its multifaceted applications and inherent properties, is poised to play a significant role in shaping the future of this industry. As research progresses, it’s anticipated that TPBi will find even more applications, solidifying its position as a cornerstone in the world of organic electronics.

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