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Product Code M2390A1-100mg
Price £380 ex. VAT

DACT-II, TADF green dopant material

Available in sublimed grade for highly efficient TADF-OLED devices

DACT-II, namely 9-[4-(4,6-diphenyl-1,3,5-triazin-2-yl) phenyl]-N3, N3, N6, N6-tetraphenyl-9H-carbazole-3,6-diamine, is a bipolar TADF green emitter with electron deficient diphenyltriazine and electron rich 3,6-diphenylaminocarbazole units, joined by a phenyl π linker. Comparing with the parent structure of Cab-Ph-Trz which serves as phosphorescent host material for green and red OLEDs, DACT-II is more electron rich with two extra set of biphenylamines on the 3,6-positions of carbazole.

DACT-II-based OLEDs exhibit a maximum EQE of 29.6% in the absence of out-coupling treatment, indicating an internal quantum efficiency (IQE) of ~ 100%, owing to its S1 and T1 excitons being rapidly converted to photons because of its large oscillator strength and small ΔEST lower than the thermal energy at room temperature. The optimized TADF-OLED device with DACT-II as the emitter and CBP:B4PyMPM as the exciplex host demonstrated an external quantum efficiency (EQE) of 31.7%, with an ultrahigh power efficiency of 145.5 lm W-1 and an unprecedented low turn-on voltage of 2.22 V.

General Information

CAS Number 1613074-59-1
Chemical Formula C57H40N6
Molecular Weight 808.97 g/mol
Emission λmax 507 nm in PMMA
HOMO/LUMO HOMO = 5.50 eV, LUMO = 3.30 eV [1]
Full Name 9-[4-(4,6-diphenyl-1,3,5-triazin-2-yl) phenyl]-N3, N3, N6, N6-tetraphenyl-9H-carbazole-3,6-diamine
Synonyms 9-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-N, N, N', N'-tetraphenyl-9H-carbazole-3,6-diamine
Classification / Family Carbazole derivatives, Triazines, TADF green dopant, Sublimed small molecules.

Chemical Structure

DACT-II, 1613074-59-1 chemical structure, 9- [4-(4,6-diphenyl-1,3,5-triazin-2-yl) phenyl]-N3, N3, N6, N6-tetraphenyl-9H-carbazole-3,6-diamine
Chemical Structure of 9- [4-(4,6-diphenyl-1,3,5-triazin-2-yl) phenyl]-N3, N3, N6, N6-tetraphenyl-9H-carbazole-3,6-diamine (DACT-II), CAS 1613074-59-1

Product Details

Purity Sublimed* >99.0% (HPLC)
Melting Point Tg = 151-159 °C (bulk sample), Tg = 192-197 °C (in film), Tm = 266 °C, TGA = 484 °C [1]
Appearance Yellow powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Device Structure

Device Structure ITO (100 nm)/HATCN6 (1 nm)/TAPC (65 nm)/TCTA (5 nm)/20 wt.% DACT-II-doped CBP (10 nm)/B4PyMPM (50 nm)/Liq (1 nm)/Al (80 nm) [2]
Colour green light emitting device  Green
Max. EQE 27.6%
Max. Current Efficiency 92.5 cd/A
Max. Power Efficiency 124.5 Im/W


Device Structure ITO (100 nm)/HATCN6 (1 nm)/TAPC (65 nm)/TCTA (5 nm)/9 wt.% DACT-II:TCTA:B4PyMPM(10 nm)/B4PyPPM (50 nm)/Liq (1 nm)/Al (80 nm) [2]
Colour green light emitting device  Green
Max. EQE 30.3%
Max. Current Efficiency 103.7 cd/A
Max. Power Efficiency 136.6 Im/W


Device Structure ITO (100 nm)/HATCN6 (1 nm)/TAPC (65 nm)/TCTA (5 nm)/9 wt.% DACT-II:CBP:B4PyMPM(10 nm)/B4PyPPM (50 nm)/Liq (1 nm)/Al (80 nm) [2]
Colour green light emitting device  Green
Max. EQE 31.7%
Max. Current Efficiency 108.4 cd/A
Max. Power Efficiency 145.4 Im/W


Device Structure ITO/PEDOT:PSS/X-QUPD (10 nm)/X-DCDPA (10 nm)/DCzPPy:20 wt% DACT-II (35 nm)/TmPyPB (55 nm)/CsF (1.5 nm)/Al [3]
Colour green light emitting device  Green
Max. EQE 28.1%
Max. Current Efficiency 101.9 cd/A
Max. Power Efficiency 99.5 Im/W

MSDS Documentation



Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2390A1 100 mg £380
Sublimed (>99.0% purity) M2390A1 250 mg £760
Sublimed (>99.0% purity) M2390A1 500 mg £1300
Sublimed (>99.0% purity) M2390A1 1 g £2200

Literature and Reviews

  1. Purely organic electroluminescent material realizing 100% conversion from electricity to light, H. Kaji et al., Nat Commun., 6, 8476 (2015); DOI: 10.1038/ncomms9476.
  2. Thin-Film Luminescent Solar Concentrator Based on Intramolecular Charge Transfer Fluorophore and Effect of Polymer Matrix on Device Efficiency, F. Mateen et al., Polymers, 13(21), 3770 (2021); DOI: 10.3390/polym13213770.
  3. Solution-Processed Thermally Activated Delayed Fluorescent OLED with High EQE as 31% Using High Triplet Energy Crosslinkable Hole Transport Materials, K. TSai et al., 29 (15), 1901025 (2019); DOI: 10.1002/adfm.201901025.
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