5CzBN


Product Code M2219A1
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5CzBN, penta-carbazolylbenzonitrile, is sterically hindered due to the five bulky electron-donating carbazolyl groups on the benzene ring struggling for space. It is a light-blue TADF fluorescence emitter widely used for highly efficient TADF-OLED devices.

General Information

CAS number n.a.
Full name 2,3,4,5,6-penta(carbazol-9-yl)benzonitrile
Synonyms 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile
Chemical formula C67H40N6
Molecular weight 929.1 g/mol
Absorption λmax 325 nm, 348 nm and 420 nm in DCM
Fluorescene λem 488 nm in toluene
HOMO/LUMO HOMO = 5.55 eV, LUMO = 2.74 eV, T1 = 2.68 eV [1]
Classification / Family Carbazole, Phthalonitrile, TADF materials, Blue dopant materials, Sublimed materials

Product Details

Purity Sublimed >99.0% (1H NMR)
Melting point Tg =  318 °C (lit.)
Appearance Yellow powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.

Chemical Structure

5czbn
Chemical Structure of 2,3,4,5,6-penta(carbazol-9-yl)benzonitrile (5CzBN).

Device Structure(s)

Device structure ITO/HATCN (5 nm)/NPB (30 nm)/TCTA (10 nm)/mCBP:5CzBN (20 wt%) (30 nm)/DpyPA:Liq (1:1, 30 nm)/LiF (0.5 nm)/Al (150 nm) [2]
Colour Blue blue
Max. EQE 16.7%
Max. Power Efficiency 40.0 Im/W


Device structure ITO (100 nm)/HATCN (10 nm)/TrisPCz (30 nm)/mCBP (10 nm)/15wt%-5CzBN:mCBP (30 nm)/T2T (10 nm)/BPyTP2 (40 nm)/LiF (0.8 nm)/Al (100 nm) [3]
Colour Blue blue
Max. EQE 18.0%
Max. Power Efficiency 49.9 Im/W

*For chemical structure information, please refer to the cited references.

MSDS Documentation

5CzBN MSDS5CzBN MSDS sheet

Pricing

Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2219A1 250 mg £313.00
Sublimed (>99.0% purity) M2219A1 500 mg £533.00
Sublimed (>99.0% purity) M2219A1 1 g £855.00


Literature and Reviews

  1. Recent progress of green thermally activated delayed fluorescent emitters, Y. Im et al., J. Info. Display, 18 (3), 101-117 (2017); DOI: 10.1080/15980316.2017.1333046.
  2. Sterically shielded blue thermally activated delayed fluorescence emitters with improved efficiency and stability, D. Zhang et al., Mater. Horiz., 3, 145-151 (2016); doi: 10.1039/C5MH00258C.
  3. Excited state engineering for efficient reverse intersystem crossing, H. Noda et al., Sci. Adv., 4:eaao6910 (2018); DOI: 10.1126/sciadv.aao6910.
  4. Evidence and mechanism of efficient thermally activated delayed fluorescence promoted by delocalized excited states, T. Hosokai et al., Sci. Adv., 3:e160328 (2017); DOI: 10.1126/sciadv.1603282.
  5. Modulation of Förster and Dexter Interactions in Single-Emissive-Layer All-Fluorescent WOLEDs for Improved Efficiency and Extended Lifetime, P. Wei et al., Adv. Funct. Mater., 2019; DOI: 10.1002/adfm.201907083.
  6. Highly efficient and stable blue thermally activated delayed fluorescence emitters, D. Zhang et al., SPIE (2016); DIO: 10.1117/2.1201611.006797.
  7. Critical role of intermediate electronic states for spin-flip processes in charge-transfer-type organic molecules with multiple donors and acceptors, H. Noda et al., Nat. Mater., 18(10), 1-7 (2019); DOI: 10.1038/s41563-019-0465-6.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.