FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code M2289A1-100mg
Price £230 ex. VAT

CbBPCb, highly efficient bipolar phosphorescent host

Can achieve high quantum efficiencies in blue PhOLEDs

CbBPCb, having similar structure to the well-known host material mCBP, is a highly efficient carboline-based phosphorescent host with oligophenyl spacer. CbBPCb is bipolar, but shows a higher electron mobility of 3.83×10-6 cm2 V-1 s-1 than its hole mobility of 6.33×10-7 cm2 V-1 s-1.

With a wide bandgap and high triplet energy level, CbBPCb can achieve high quantum efficiencies of over 30.0% in blue phosphorescent organic light emitting diodes. This is due to the host-guest energy transfer, balanced charge injection / transporting and effective exciton confinement within the emitting layer [1, 2]

General Information

CAS number 1469997-91-8
Chemical formula C34H22N4
Molecular weight 486.57 g/mol
Absorption λmax 240 nm, 297 nm (THF)
Photoluminescence λem 382 nm (THF)
HOMO/LUMO HOMO = 6.25 eV, LUMO = 2.79 eV; ET = 2.77 eV [1]
Chemical name 3,3'-Di(9H-pyrido[2,3-b]-indol-9-yl)biphenyl
Synonyms mCbBP
Classification / Family Carboline derivatives, Phosphorescent host materials, Sublimed materials, Semiconducting small molecules

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point mp = 251 °C, Tg = 96 °C (lit.)
Appearance Off-white powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the sublimed materials.

Chemical Structure

CbBPCb chemical structure, 1469997-91-8
Chemical structure of 3,3'-Di(9H-pyrido[2,3-b]-indol-9-yl)biphenyl (CbBPCb)

Device Structure(s)

Device structure ITO (50 nm)/PEDOT:PSS (60 nm)/TAPC (20 nm)/mCP (10 nm)/CbBPCb:10wt% FIrpic (25 nm)/TSPO1 (35 nm)/LiF (1 nm)/Al (200 nm) [2]
Colour blue light emitting device Blue
Max. Current Efficiency 53.6 cd/A
Max. EQE 30.1
Max. Power Efficiency 50.6 Im/W


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2289A1 100 mg £230
Sublimed (>99.0% purity) M2289A1 250 mg £460
Sublimed (>99.0% purity) M2289A1 500 mg £800
Sublimed (>99.0% purity) M2289A1 1 g £1400

MSDS Documentation


Literature and Reviews

  1. Above 30% External Quantum Efficiency in Blue Phosphorescent Organic Light-Emitting Diodes Using Pyrido[2,3-b]indole Derivatives as Host Materials, C. Lee et al., Adv. Mater., 25(38), 5450-4 (2013); DOI: 10.1002/adma.201301091.
  2. FIrpic: archetypal blue phosphorescent emitter for electroluminescence, E. Baranoff et al., Dalton Trans. 44, 8318-8329 (2015); DOI: 10.1039/C4DT02991G.
  3. Functionalization of phosphorescent emitters and their host materials by main-group elements for phosphorescent organic light-emitting devices, X. Yang et al., Chem. Soc. Rev., 44, 8484-8575 (2015); DOI: 10.1039/C5CS00424A.
Return to the top