|Molecular weight||487.57 g/mol|
|Absorption||λmax 310, 375 nm in film|
|Fluorescene||λem 625 nm in film|
|HOMO/LUMO||HOMO 5.37 eV, LUMO 3.49 eV |
|Classification / Family||Thioxanthone derivatives, Organic electronics, TADF-OLEDs, TADF yellow dopant materials, Sublimed materials.|
|Purity||Sublimed 99.76% (HPLC)>|
|Melting point||TGA: >250 °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.
TXO-TPA has an ambipolar D-A type structure with TXO as the electron-accepting and triphenylamine (TPA) as the electron-donating unit. The twice-oxidised thiophene on TXO moiety can greatly enhance the electron-accepting ability as the channel for higher electron mobility. On the other hand, electron-rich TPA is used as the channel for higher hole mobility.
TXO-TPA is commonly used as a red dopant material in TADF-OLED devices. This is due to its high device performance capabilities with high external quantum efficiency (EQE).
|Device structure||ITO/PEDOT (30 nm)/TAPC (20 nm)/5 wt%TXO-TPA:mCP (35 nm) /TmPyPB (55 nm)/LiF(0.9 nm)/Al |
|Current Efficiency@100 cd/m2||43.3 cd/A|
|EQE@100 cd/m2||18.5 %|
|Power Efficiency@100 cd/m2||47.4 lm W-1|
|Device structure||ITO/PEDOT (20 nm)/TAPC (30 nm)/TXO-TPA (0.5 nm)/4P-NPB* (0.5 nm)/mCP (10 nm)/TmPyPB (50 nm)/LiF (0.9 nm)/Al (100 nm) |
|Max. Current Efficiency||10.5 cd/A|
|Max. Power Efficiency||8.9 lm W-1|
*For chemical structure information, please refer to the cited references
Literature and Reviews
- Novel Thermally Activated Delayed Fluorescence Materials–Thioxanthone Derivatives and Their Applications for Highly Efficient OLEDs, H. Wang et al., Adv. Mater., 26, 5198–5204 (2014); DOI: 10.1002/adma.201401393.
- White organic light emitting diodes based on a yellow thermally activated delayed fluorescent emitter and blue fluorescent emitter, L. Meng et al., RSC Adv., 5, 59137-59141 (2015); DOI: 10.1039/C5RA09168C.
- Purely Organic Thermally Activated Delayed Fluorescence Materials for Organic Light‐Emitting Diodes, M. Wong et al., Adv.Mater., 29, 1605444 (2017); DOI: 10.1002/adma.201605444.
- Impact of Dielectric Constant on the Singlet−Triplet Gap in Thermally Activated Delayed Fluorescence Materials, H. Sun et al., J. Phys. Chem. Lett., 8, 2393−2398 (2017); DOI: 10.1021/acs.jpclett.7b00688.