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PYD-2Cz (PYD2)

Product Code M2102A1
Price $363.00 ex. VAT

PYD-2Cz, bipolar host material for PhOLEDs

Ideal candidate for hosting blue electrophosphorescence OLEDs

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
Fluorescence 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

Chemical structure of PYD-2Cz
Chemical structure of 2,6-Bis(9H-carbazol-9-yl)pyridine (PYD-2Cz)

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 red light emitting device
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 green light emitting device
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 green light emitting device
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 blue light emitting device
Max. Current Efficiency 70.4 cd/A
Max. EQE 23.8%
Max. Power Efficiency 47.3 lm/W
Max. Luminance 33,470 cd/m2


 Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2102A1 250 mg £290
Sublimed (>99.0% purity) M2102A1 500 mg £480
Sublimed (>99.0% purity) M2102A1 1 g £700

MSDS Documentation


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.

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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