2,6-Bis(9H-carbazol-9-yl)pyridine (PYD-2Cz) is composed of two electron-donating carbazole substituents with an electron deficient pyridine core unit. PYD-2Cz is a commonly-used bipolar host material for phosphorescent organic light‐emitting diodes (PHOLEDs). This is due to its wide band-gap and ability to be both an electron acceptor and donor.

With higher triplet energy levels (T1 = 2.93 eV), PYD-2Cz is an ideal candidate for hosting blue electrophosphorescence OLEDs.

General Information

CAS number	168127-49-9
Full name	2,6-Bis(9H-carbazol-9-yl)pyridine
Chemical formula	C29H19N3
Molecular weight	409.48 g/mol
Absorption	λmax 241 nm, 290 nm in DCM
Fluorescene	λem 373 nm in THF
HOMO/LUMO	HOMO = 5.7 eV, LUMO = 2.2 eV; T1 = 2.93 eV [1]
Synonyms	PYD2, PYD-2, mCPy
Classification / Family	Carbazole, Bipolar host materials, TADF green emitter materials, Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials

Product Details

Purity	Sublimed >99.0% (HPLC)
Melting point	202°C (lit.)TGA: >250 °C (0.5% weight loss)
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 for OLED devices page.

Chemical Structure

Device Structure(s)

Device structure	ITO/TAPC (40 nm)/PYD-2Cz:2wt% of Ir(MDQ)2acac (30 nm)/BmPyPhB (40 nm)/LiF (0.8 nm)/Al (150 nm) [2]
Colour	Red
Max. Current Efficiency	15.0 cd/A
Max. EQE	8.5%
Max. Power Efficiency	12.8 Im/W

Device structure	ITO (100 nm)/PEDOT:PSS (35 nm)/PLEXCORE UT-314 (20 nm)/PYD2:Cu(I)-iBuPyrPHOS 3:1 (30 nm)/3TPYMB(70 nm)/LiF (1 nm)/Al [3]
Colour	Green
Max. Current Efficiency	65.4 cd/A
Max. EQE	21%

Device structure	ITO (130 nm)/PEDOT:PSS (30 nm)/PLEXCORE UT-314(45 nm)/PYD2:Cu(I)-complex 7:3 (27 nm)/3TPYMB (50 nm)/LiF (2 nm)/Al (100nm) [4]
Colour	Green
Max. Current Efficiency	73 cd/A
Max. EQE	23%

Device structure	ITO/PEDOT:PSS/ PYD2: 4 wt% Au (III) complex 5 (60 nm)/ TPBi/LiF (1.2 nm)/Al (100 nm) [5]
Colour	Sky Blue
Max. Current Efficiency	70.4 cd/A
Max. EQE	23.8%
Max. Power Efficiency	47.3 lm/W
Max. Luminance	33,470 cd/m2

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.0% purity)	M2102A1	250 mg	£242.00
Sublimed (>99.0% purity)	M2102A1	500 mg	£398.00
Sublimed (>99.0% purity)	M2102A1	1 g	£582.00

MSDS Documentation

PYD-2Cz MSDS sheet

Literature and Reviews

1. Analyzing Bipolar Carrier Transport Characteristics of Diarylamino-Substituted Heterocyclic Compounds in Organic Light-Emitting Diodes by Probing Electroluminescence Spectra, K. Son et al., Chem. Mater., 20, 4439–4446 (2008); DIO: 10.1021/cm8004985.
2. Phenanthro[9,10-d]imidazole based new host materials for efficient red phosphorescent OLEDs, D. Tavgeniene et al., Dyes and Pigments, 137, 615-621 (2017); DIO: 10.1016/j.dyepig.2016.11.003.
3. Highly Efficient Organic Light-Emitting Diode Using A Low Refractive Index Electron Transport Layer, A. Salehi et al., Adv. Optical Mater., 1700197 (2017); DOI: 10.1002/adom.201700197.
4. Bridging the Effi ciency Gap: Fully Bridged Dinuclear Cu(I)-Complexes for Singlet Harvesting in High-Effi ciency OLEDs, D. Volz et al., Adv. Mater., 27, 2538–2543 (2015); DOI: 10.1002/adma.201405897.
5. Highly Luminescent Pincer Gold(III) Aryl Emitters: Thermally Activated Delayed Fluorescence and Solution‐Processed OLEDs, W-P. To et al., DOI: 10.1002/anie.201707193.
6. High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor–acceptor hybrid molecules, S. Lee et al., Appl. Phys. Lett. 101, 093306 (2012); doi: 10.1063/1.4749285.

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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.

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