BPhen, also known as bathophenanthroline or 4,7-diphenyl-1,10-phenanthroline (CAS 1662-01-7), is a sublimed organic semiconductor from Ossila with purity above 99.5%. Thanks to its wide energy gap and high ionization potential, it is a common choice for hole-blocking or exciton-blocking layers in OLEDs, organic photovoltaics and perovskite solar cells.
Its compact, rigid and planar phenanthroline core carries extended π-electrons and short hopping distances, which support electron transport. Electron mobility is about 5 × 10-4 cm2 V-1 s-1, roughly two orders of magnitude above that of Alq3.
Doping with lithium turns BPhen into BPhen:Li, an effective electron-transport material frequently applied as an electron-injection layer. In this form it gives ohmic contact to any electrode, so work function matching does not need to be considered. The material is supplied as off-white to pale yellow crystals in 1 g and 5 g packs.
- Hole-blocking or exciton-blocking layers in OLED device stacks.
- Lithium-doped electron-injection layers providing ohmic contact to any electrode.
- Electron-transport layers in green, red, yellow, deep blue and white OLEDs.
- Charge-blocking and transport layers in organic photovoltaics.
- Interlayers in perovskite solar cell research.
| Brand | Ossila |
|---|---|
| CAS number | 1662-01-7 |
| Molecular formula | C24H16N2 |
| Purity | Sublimed > 99.5% |
| Category | — |
| Pack sizes | 1 g, 5 g |
| Physical form | Off-white to pale yellow crystals |
| Storage | — |
- Product code: M961
- Molecular weight: 332.40 g/mol
- Melting point: 218-220 °C (lit.)
- Absorption: λmax 272 nm (in THF)
- Fluorescence: λem 379 nm (in THF)
- HOMO/LUMO: HOMO = 6.4 eV; LUMO = 3.0 eV
- Electron mobility: about 5 × 10-4 cm2 V-1 s-1
- Synonyms: Bathophenanthroline; 4,7-Diphenyl-1,10-phenanthroline
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