DACT-II

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

Chemical Structure

Product Details

*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
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
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
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
Max. EQE	28.1%
Max. Current Efficiency	101.9 cd/A
Max. Power Efficiency	99.5 Im/W

MSDS Documentation

DACT-II MSDS sheet

Pricing

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.