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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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 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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