4DBFHPB (CAS 2280942-02-9) is a hole transport layer (HTL) material for organic light-emitting devices. Its structure combines a central hexaphenylbenzene (HPB) core with two electron-donating dibenzofuranylphenylamine end groups, a design family known for efficient, long-lived TADF and phosphorescent OLEDs. It is offered in sublimed (≥99%) and unsublimed (≥98%) grades.
The material has a glass transition temperature of 135 °C, giving good thermal and electrical stability, and shows a markedly higher anionic bond dissociation energy than its phenyl-containing analogue. Its triplet energy of 2.7 eV and hole mobility of 1.5 × 10−3 cm2 V−1 s−1, about 300 times that of the diphenylamine-terminated TATT, support stable blue and green emitting devices.
In a reported green TADF OLED using 4CzIPN as emitter, 4DBFHPB as the HTL gave roughly 19.2% EQE and an LT50 above 24,000 h.
- Hole transport layer in green TADF OLEDs, such as devices using a 4CzIPN emitter.
- Hole transport layer in sky-blue TADF OLEDs, such as devices using a 5TCzBN emitter.
- Hole transport material for phosphorescent OLEDs requiring high triplet energy.
- Research on device lifetime and stability of organic light-emitting devices.
| Brand | Ossila |
|---|---|
| CAS number | 2280942-02-9 |
| Molecular formula | C78H52N2O2 |
| Purity | Sublimed ≥99%, unsublimed ≥98% |
| Category | — |
| Pack sizes | — |
| Physical form | Pale brown to beige powder/crystals |
| Storage | — |
- Product code: M2537B1
- Molecular Weight: 1049.26 g/mol
- Thermal Properties: Tg = 135 °C, Tm = 313 °C, Td = 490 °C (5% weight loss)
- Absorption: λmax 325 nm (in Film)
- Photoluminescence: λem 399 nm (in Film)
- HOMO/LUMO: HOMO = -5.80 eV, LUMO = -2.60 eV
- Triplet Energy: 2.7 eV
- 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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