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Product Code M2342A1-250mg
Price $475 ex. VAT

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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

CAS number 159526-57-5
Chemical formula C53H44N2
Molecular weight 708.93 g/mol
Absorption λmax 304 nm (in THF)
Fluorescence λem 431 nm(in THF)
HOMO/LUMO HOMO = 5.31 eV, LUMO = 1.84 eV [1] ET = 2.87 eV
Full chemical name 9,9-di[4-(di-p-tolyl)aminophenyl]fluorine
Synonyms 4,4′-(9H-fluorene-9,9-diyl)bis(N,N-di-p-tolylaniline), 4,4'-(9H-fluoren-9-ylidene)bis[N,N-bis(4-methylphenyl)-benzenamine
Classification / Family Triarylamine derivatives, TADF exciplex, Hole transporting layer (HTL) materials, Electron blockingt layer (EBL) materials, Sublimed materials

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point mp = 374 °C (DSC)
Appearance White powder/crystals

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

Chemical Structure

Chemical structure of DTAF, CAS 159526-57-5
Chemical structure of DTAF, CAS 159526-57-5

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 light emitting device 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 light emitting device 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 light emitting device 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 light emitting device 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 light emitting device 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 yellow light emitting device Greenish-Yellow
Max. Current Efficiency 62.0 cd/A
Max. EQE 19.2%
Max. Power Efficiency 62.0 Im/W

Pricing

Grade Order Code Quantity Price
Sublimed(>99.0% purity) M2342A1 250 mg £380
Sublimed(>99.0% purity) M2342A1 500 mg £620
Sublimed(>99.0% purity) M2342A1 1 g £1000

MSDS Documentation

DTAF MSDSDTAF 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..

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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