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.
|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 ; ET= 2.99 eV|
|Full chemical name||2,4,6-Tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine|
|Classification / Family||Triazine derivatives, TADF exciplex co-host, Phosphorescent organic light-emitting devices (PHOLEDs), TADF phosphorescent host, Electron transport layer materials, Sublimed materials|
|Purity||Sublimed >99.0% (HPLC)|
|Melting point||TGA 460 °C(0.5% weight loss)|
*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.
|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) 
|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). 
|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). |
|Max. Current Efficiency||37.8cd/A|
|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) |
|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
- 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.
- 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.
The First Tandem, All-exciplex-based WOLED, W. Hung et al., Sci. Rep., 4, 5161 (2014); DOI: 10.1038/srep05161.
- 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.
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.
- High-efficiency organic light-emitting diodes with exciplex hosts, Q. Wang et al., J. Mater. Chem. C, 7, 11329 (2019); DOI: 10.1039/c9tc03092a.
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