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PO-T2T CAS 1646906-26-4
Product Code M2266A1-100mg
Price £160 ex. VAT
£ GBP

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High purity PO-T2T, low price with additional savings for quantities of 5 g or more

Popular TADF host and exciplex material, also used as transport layer material in organic electronic devices

PO-T2T (CAS number 1646906-26-4), known in full as 2,4,6-tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine, is an electron deficient semiconducting molecule with a triazine centre and three diphenylphosphines.

Exciplex-forming with other electron donating host materials such as mCP, PO-T2T is a popular TADF host material with a high triplet energy level. The forming of exciplexes between mCP and PO-T2T is efficient, as is the energy transfer from such an exciplex to a blue phosphorescent dopant such as FIrpic. This enables triplet harvesting without energy loss.

Because of its electron-deficient nature with a deep highest occupied molecular orbital (HOMO = 7.55 eV), PO-T2T is also used as electron transport layer (ETL) / hole blocking layer (HBL) material in organic electronic devices.

Together with other electron donating materials, PO-T2T as universal exciplex hosts with improved device lifetime, efficiency and lower driving voltage.

Guest Exciplex Host Color Efficiencies DOI
FIrPic mCBP:PO-T2T Sky-Blue Phosphorescent  EQE: 34.1%
Max. PE: 79.6 lm W−1		 10.1002/adma.201506065
4CzIPN CBP:PO-T2T Green TADF EQE: 20.0%
Max. PE: 62.1 lm W−1		 10.1016/j.orgel.2019.06.001
Ir(mphmq)2tmd NPB:PO-T2T Red phosphorescent EQE: 34.1%
Max. PE: 62.2 lm W−1		 10.1021/acsami.6b14438
2CzPN, AnbTPA CDBP:PO-T2T White TADF EQE: 19.2%
Max. PE: 46.2 lm W−1		 10.1016/j.orgel.2017.08.024

Highly efficient thermally activated delayed fluorescence (TADF) exhibiting high reverse intersystem crossing (RISC) yields by using PO-T2T as the acceptor unit to form exciplex emitting layer.

Exciplex Emission Layer Color Efficiencies DOI
DMAC-DPS:PO-T2T  536 nm to 496 nm EQE: 10.4–12.1%
Max. PE: 24.2–39.5 lm W−1		 10.1016/j.optmat.2020.110779
MAC:PO-T2T Green TADF EQE: 17.8%
Max. PE: 45.5 lm W−1		 10.1002/adfm.201505014
TSBPA:PO-T2T Green TADF EQE: 14.8%
 10.1021/acs.jpclett.8b03646
Ir(ppy)3:PO-T2T Red TADF EQE: 5% 10.3389/fchem.2019.00016

General Information

CAS number 1646906-26-4
Chemical formula C57H42N3O3P3
Molecular weight 909.80 g/mol
Absorption λmax 272 nm (in DCM)
Fluorescence λem 295 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 POT2T
Classification / Family Triazine derivatives, TADF exciplex co-host, phosphorescent organic light-emitting devices (PHOLEDs), TADF phosphorescent host, electron transport layer materials, sublimed materials

Product Details

Purity Sublimed* >99.5% (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.

Chemical Structure

PO-T2T chemical structure
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 White white light emitting device
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 (1:1, 20 nm)/PO-T2T (45 nm)/Liq (1 nm)/Al (1 nm)/MoO3(5 nm)/DTAF (20 nm)/DTAF:PO-T2T (1:1, 20 nm)/PO-T2T(50 nm)/Liq (0.5 nm)/Al (100 nm). [3]
Colour White white light emitting device
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 White white light emitting device
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, NIR deep red light emitting device
Max. EQE 26.5%

Pricing

Quantity Grade Product Code Price
100 mg Sublimed (>99.5% purity) M2266A1 £160
250 mg Sublimed (>99.5% purity) M2266A1 £320
500 mg Sublimed (>99.5% purity) M2266A1 £520
1 g Sublimed (>99.5% purity) M2266A1 £850
5 g (most popular) Sublimed (>99.5% purity) M2266A1 £1850
10 g Sublimed (>99.5% purity) M2266A1 £3100
25 g Sublimed (>99.5% purity) M2266A1 £7000

Please contact us for quantities over 50g and up to 1kg.

MSDS Documentation

PO-T2T MSDSPO-T2T MSDS sheet

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.
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