PYD-2Cz


In stock (price excludes taxes)
Order Code: M2102A1
MSDS sheet

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
Classification / Family Carbazole, Bipolar host materials, TADF green emitter materials, Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials

Product Details

Purity Sublimed >99.8% (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 of PYD-2Cz
Chemical structure of 2,6-Bis(9H-carbazol-9-yl)pyridine (PYD-2Cz).

 

Applications

2,6-Bis(9H-carbazol-9-yl)pyridine (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.

 

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
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
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
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
Max. Current Efficiency 70.4 cd/A
Max. EQE 23.8%
Max. Power Efficiency 47.3 lm/W
Max. Luminance 33,470 cd/m2

 

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.