4DBFHPB (CAS 2280942-02-9) is a triarylamine hole transport layer (HTL) material for organic light-emitting devices. Its structure combines a hexaphenylbenzene (HPB) core with two electron-donating dibenzofuranylphenylamine end groups, a design family known for high efficiency and long lifetime in TADF and phosphorescent OLEDs. It is offered in sublimed (≥99%) and unsublimed (≥98%) grades.
The material has a glass transition temperature of 135 °C and offers good thermal and electrical stability. Compared with its phenyl-containing analogue, it shows a substantially higher anionic bond dissociation energy, which supports stable operation in blue and green emitting devices. Its triplet energy of 2.7 eV and hole mobility of 1.5 × 10−3 cm2 V−1 s−1, 300 times that of the diphenylamine-terminated analogue TATT, make it well suited to high-efficiency stacks.
In a green TADF-OLED using 4CzIPN as the emitter, a 4DBFHPB hole transport layer delivered approximately 19.2% EQE, an LT50 of over 24,000 h and a low driving voltage at 1000 cd cm-2.
- Hole transport layer in green TADF OLEDs, such as devices using 4CzIPN as the emitter.
- Hole transport layer in sky-blue TADF OLEDs, such as devices using 5TCzBN as the emitter.
- Hole transport material for phosphorescent organic light-emitting devices.
- Research on high-triplet-energy hole transporters for long-lifetime OLEDs.
| Brand | Ossila |
|---|---|
| CAS number | 2280942-02-9 |
| Molecular formula | C78H52N2O2 |
| Purity | Sublimed ≥99%, unsublimed ≥98% |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Pale brown to beige powder/crystals |
| Storage | — |
- Product code: M2537A1
- Molecular Weight: 1049.26 g/mol
- Absorption: λmax 325 nm (in film)
- Photoluminescence: λem 399 nm (in film)
- HOMO/LUMO: HOMO = -5.80 eV, LUMO = -2.60 eV (ET = 2.7 eV)
- Thermal Properties: Tg = 135 °C, Tm = 313 °C, Td = 490 °C (5% weight loss)
- Hole Mobility: 1.5 × 10−3 cm2 V−1 s−1
- Classification: Triarylamine derivative, Sublimed materials, Hole transport layer (HTL), OLEDs
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