5CzBN

CAS Number 1469700-24-0

Blue Dopant Materials, Dopant Materials, High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules, TADF Materials

MSDS

5CzBN, light-blue TADF fluorescence emitter

High-purity (>99.0%) and available online for priority dispatch, CAS No. 1469700-24-0, 2,3,4,5,6-penta(carbazol-9-yl)benzonitrile, Penta-carbazolylbenzonitrile, TADF blue dopant

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	1469700-24-0
Full name	2,3,4,5,6-penta(carbazol-9-yl)benzonitrile
Synonyms	5CzCN, 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile
Chemical formula	C₆₇H₄₀N₆
Molecular weight	929.1 g/mol
Absorption	λ_max 325 nm, 348 nm and 420 nm in DCM
Fluorescence	λ_em 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	Unsublimed >98%; Sublimed >99.0% (1H NMR)
Melting point	T_g = 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.

Chemical Structure

5czbn, 1469700-24-0 — Chemical Structure of 2,3,4,5,6-penta(carbazol-9-yl)benzonitrile (5CzBN), CAS 1469700-24-0.

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
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
Max. EQE	18.0%
Max. Power Efficiency	49.9 Im/W

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

MSDS Documentation

5CzBN MSDS sheet

Literature and Reviews

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.
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.
Excited state engineering for efficient reverse intersystem crossing, H. Noda et al., Sci. Adv., 4:eaao6910 (2018); DOI: 10.1126/sciadv.aao6910.

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.
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.
Highly efficient and stable blue thermally activated delayed fluorescence emitters, D. Zhang et al., SPIE (2016); DIO: 10.1117/2.1201611.006797.
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.