PYD-2Cz (PYD2)

CAS Number 168127-49-9

High Purity Sublimed Materials, Host Materials, Semiconducting Molecules, TADF Materials

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	λ_max 241 nm, 290 nm in DCM
Fluorescence	λ_em 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.

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	£320
Sublimed (>99.0% purity)	M2102A1	500 mg	£520
Sublimed (>99.0% purity)	M2102A1	1 g	£760

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.