B4PyPPm (4,6-Bis(3,5-di(pyridin-4-yl)phenyl)-2-phenylpyrimidine, CAS 1097652-83-9) is an electron-deficient organic semiconductor used as an electron transport or electron injection layer in OLED devices. It is supplied as sublimed white crystals or powder with a purity above 99.0% by HPLC.
The molecule is built on a 2-phenylpyrimidine core carrying four pyridine side groups. This design gives it strong electron injection behaviour and an electron mobility ten times higher than that of 3-pyridine analogues such as B3PyMPM. It is also classed as a hole-blocking layer (HBL) material.
Because it is electron-poor, B4PyPPm can be combined with electron-donating materials to create exciplex systems, which serve as high-performance hosts for red fluorescent and phosphorescent TADF-OLEDs. Reported devices using it as the electron transport layer include green phosphorescent and TADF OLEDs reaching a maximum EQE of 25.7% and a red exciplex-hosted device with a maximum EQE of 20.3%.
- Electron transport layer (ETL) in OLED devices.
- Electron injection layer material in organic light-emitting diodes.
- Hole-blocking layer (HBL) in multilayer OLED stacks.
- Acceptor component of exciplex hosts for red fluorescent and phosphorescent TADF-OLEDs.
- ETL for high-efficiency green phosphorescent and TADF OLEDs.
| Brand | Ossila |
|---|---|
| CAS number | 1097652-83-9 |
| Molecular formula | C42H28N6 |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | White crystals/powder |
| Storage | — |
- Product code: M2176A2
- Full name: 4,6-Bis(3,5-di(pyridin-4-yl)phenyl)-2-phenylpyrimidine
- Molecular weight: 616.71 g/mol
- Melting point: 356 °C
- Absorption: λ max 254 nm in DCM
- HOMO/LUMO: HOMO = 7.15 eV, LUMO = 3.44 eV
- Triplet energy (ET1): 2.72 eV
- Classification: Pyrimidine derivatives, ETL materials, HBL materials, TADF materials, Sublimed materials
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