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Product Code M2266A1

PO-T2T, namely2,4,6-tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazineis electron deficient with a triazine centre and threediphenylphosphines.

Forming exciplex with other electron donating host materials, mCP for example, PO-T2T is a popular TADF host material with high triplet energy level.Exciplexes are formed efficiently between mCP and PO-T2T in the host and the energy transfer from the exciplex to blue phosphorescent dopant i.e. FIrpic is also efficient, enabling the triplet harvest without energy loss.

For its electron-deficient nature, PO-T2T is also used as electron transport layer (ETL)/hole blocking layer (HBL) material in organic electronic devices.

General Information

CAS number 1646906-26-4
Chemical formula C57H42N3O3P3
Molecular weight 909.80 g/mol
Absorption λmax272 nm (in DCM)
Fluorescene λem295 nm, 378 nm(in DCM)
HOMO/LUMO HOMO = 7.55 eV, LUMO = 3.50 eV [1]; ET= 2.99 eV
Full chemical name 2,4,6-Tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine
Synonyms PO-T2T
Classification / Family Triazine derivatives, TADF exciplex co-host, Phosphorescent organic light-emitting devices (PHOLEDs),Phosphorescent host,Sublimed materials

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point TGA 460 °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 devicespage.

Chemical Structure

PO-T2T, CAS# 1646906-26-4, 2,4,6-Tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine
Chemical structure of 2,4,6-tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine(PO-T2T), CAS# 1646906-26-4.

Device Structure(s)

Device structure ITO/MoO3(10 nm)/TAPC:MoO3 (20.0%, 50 nm)/CDBP (10 nm)/
dCDBP:PO-T2T:PO-01 (1:1, 0.3%, 20 nm)/PO-T2T (10 nm)/PO-T2T:Li2CO3 (3%,45 nm)/Li2CO3 (1 nm)/Al (100 nm) [2]
Colour Whitewhite
Max. Current Efficiency 88.7 cd/A
Max. EQE 28.3 %
Max. Power Efficiency 102.9 Im/W


Device structure ITO/PEDOT:PSS (30 nm)/TPAC (20 nm)/mCP (15 nm)/
mCP:PO-T2T (151, 20 nm)/PO-T2T (45 nm)/Liq (1 nm)/Al (1 nm)/MoO3(5 nm)/DTAF (20 nm)/DTAF:PO-T2T (151, 20 nm)/PO-T2T(50 nm)/Liq (0.5 nm)/Al (100 nm). [3]
Colour Whitewhite
Max. Current Efficiency 27.7 cd/A
Max. EQE 11.6 %
Max. Power Efficiency 15.8 Im/W

Device structure ITO/4% ReO3: mCP (60 nm)/ mCP (15 nm)/ CN-Cz2:PO-T2T (1:1 w%) (20 nm)/PO-T2T (10 nm)/CN-T2T (40 nm)/Liq (0.5 nm)/Al (100 nm). [4]
Colour Whitewhite
Max. Current Efficiency 37.8cd/A
Max. EQE 16%
Max. Power Efficiency 47.5 Im/W
Device structure ITO/MoO3 (3nm)/TAPC (35 nm)/CBP:TTM-3PCz (3.0 wt %) (25 nm)/B3PYMPM (10 nm)/PO-T2T (70 nm)/LiF (0.8 nm)/Al (100 nm) [5]
Colour Deep-red, NIRred
Max. EQE 26.5%


Grade Order Code Quantity Price
Sublimed(>99.0% purity) M2266A1 100 mg £150.00
Sublimed(>99.0% purity) M2266A1 250 mg £300.00
Sublimed(>99.0% purity) M2266A1 500 mg £500.00
Sublimed(>99.0% purity) M2266A1 1 g £850.00



Literature and Reviews

  1. An Exciplex Forming Host for Highly Efficient Blue Organic Light Emitting Diodes with Low Driving Voltage, J-H. Lee et al., Adv. Funct. Mater., 25 (3), 361-366 (2014); DOI: 10.1002/adfm.201402707.
  2. Precise Exciton Allocation for Highly Efficient White Organic Light-Emitting Diodes with Low Efficiency Roll-Off Based on Blue Thermally Activated Delayed Fluorescent Exciplex Emission, Z. Wu et al., Adv. Optical Mater., 1700415 (2017); DOI: 10.1002/adom.201700415.
  3. The First Tandem, All-exciplex-based WOLED, W. Hung et al., Sci. Rep., 4, 5161 (2014); DOI: 10.1038/srep05161.
  4. Probe exciplex structure of highly efficient thermally activated delayed fluorescence organic light emitting diodes, T-C. Lin et al., Nature Commun., 9, 3111 (2018) DOI: 10.1038/s41467-018-05527-4.
  5. Efficient radical-based light-emitting diodes with doublet emission, X. Ai et al., Nature 563, 536–540(2018); DOI: 10.1038/s41586-018-0695-9.
  6. High-efficiency organic light-emitting diodes with exciplex hosts, Q. Wang et al., J. Mater. Chem. C, 7, 11329 (2019); DOI: 10.1039/c9tc03092a.

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.