DTAF

DTAF, HTL and EBL material for OLED devices

Paired with PO-T2T to generate yellow emission

DTAF, or 9,9-di[4-(di-p-tolyl)aminophenyl]fluorine, has a fluorine centred structure with two N,N-bis(p-tolyl))benzenamine attached to the fluorine. DTAF is electron rich, so is normally used as a hole transporting layer or electron blocking layer (with a LUMO of 1.84 eV) in OLED devices.

DTAF can also form exciplexes with other electron deficient materials, such as PO-T2T, generating yellow exciplex emission. Parallel all exciplex based white-light OLED (WOLED) blend layers of mCP/PO-T2T and DTAF/PO-T2T demonstrates excellent maximum current and power efficiencies (27.7 cd/A and 15.8 ml/W respectively) with CIE(0.29, 0.35) and CRI 70.6 [1].

General Information

Product Details

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

Chemical Structure

Device Structure

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). [1]
Colour	White
Max. Current Efficiency	27.7 cd/A
Max. EQE	11.6 %
Max. Power Efficiency	15.8 Im/W

Device structure	ITO/PEDOT:PSS (30 nm)/DTAF (25 nm)/12 wt% FIrpic:CNBzIm (25 nm)/TPBI (50 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour	Blue
Max. Current Efficiency	29.0 cd/A
Max. EQE	12.7%
Max. Power Efficiency	30.5 Im/W

Device structure	ITO/PEDOT:PSS (30 nm)/DTAF (25 nm)/10 wt%(PPy)2Ir(acac):CNBzIm (25 nm)/TPBI (50 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour	Green
Max. Current Efficiency	66.8 cd/A
Max. EQE	17.8%
Max. Power Efficiency	59.4 Im/W

Device structure	ITO/PEDOT:PSS (30 nm)/DTAF (25 nm)/10 wt% Os(bpftz)2(PPh2Me)2:CNBzIm (25 nm)/TPBI (50 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour	Red
Max. Current Efficiency	33.8 cd/A
Max. EQE	19.1%
Max. Power Efficiency	27 Im/W

Device structure	ITO/PEDOT:PSS (30 nm)/DTAF (25 nm)/12 wt% FIrpic:0.3 wt% Os(bpftz)2(PPh2Me)2:CNBzIm (25 nm)/TPBI (50 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour	White
Max. Current Efficiency	35.0 cd/A
Max. EQE	15.7%
Max. Power Efficiency	36.6 Im/W

Device structure	ITO/PEDOT:PSS (30 nm)/DTAF (25 nm)/10 wt% (pbi)2Ir(acac):CPhBzIm (25 nm)/TPBI (50 nm)/LiF (0.5 nm)/Al (100 nm) [3]
Colour	Greenish-Yellow
Max. Current Efficiency	62.0 cd/A
Max. EQE	19.2%
Max. Power Efficiency	62.0 Im/W

Pricing

MSDS Documentation

DTAF MSDS sheet

Literature and Reviews

1. The First Tandem, All-exciplex-based WOLED, W. Huang et al., Sci. Report, 4, 5161 (2014); DOI: 10.1038/srep05161.
2. A carbazole–phenylbenzimidazole hybrid bipolar universal host for high efficiency RGB and white PhOLEDs with high chromatic stability, W. Hung et al., J. Mater. Chem., 21, 19249 (2011); DOI: 10.1039/c1jm14029a.
3. A new benzimidazole/carbazole hybrid bipolar material for highly efficient deep-blue electrofluorescence, yellow–green electrophosphorescence, and two-color-based white OLEDs, W. Hung et al., J. Mater. Chem., 20, 10113–10119 (2010); DOI: 10.1039/c0jm02143a.
4. Exciplex: An Intermolecular Charge-Transfer Approach for TADF, M. Sarma et al., ACS Appl. Mater. Interfaces, 10 (23), 19279–19304 (2018); DOI: 10.1021/acsami.7b18318..