BCPO, or Bis-4-(N-carbazolyl)phenyl)phenylphosphine oxide (CAS 1233407-28-7), is a bipolar host material for organic light-emitting diodes. Ossila supplies it in sublimed grade with a purity above 99% (HPLC), as white crystals or powder.
Its structure pairs an electron-withdrawing phenylphosphine oxide unit with two electron-donating carbazolyl groups. Because the central phosphine oxide interrupts electronic communication between the two N-phenyl carbazole groups, BCPO reaches a triplet energy of 3.01 eV, considerably higher than that of CBP. A glass transition temperature of 137 °C adds thermal robustness to deposited films.
Similar to CBP and mCBP, BCPO works as a universal host for blue, green and red emitters, both fluorescent and phosphorescent, and lends itself to simple device architectures. Published devices using BCPO include phosphorescent and TADF OLEDs, with a green Ir(ppy)3 device reaching 97.6 cd/A and a TADF green device reaching an EQE of 30.9%.
- Host layer for blue, green and red phosphorescent OLEDs.
- Host matrix for fluorescent emitters in OLED devices.
- Host for thermally activated delayed fluorescence (TADF) emitters such as AC-DBNA and TAT-3DBTO2 derivatives.
- Emissive layer material in simplified OLED device architectures.
- Research in organic printed electronics.
| Brand | Ossila |
|---|---|
| CAS number | 1233407-28-7 |
| Molecular formula | C42H29N2OP |
| Purity | Sublimed > 99% (HPLC) |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | White crystals/powder |
| Storage | — |
- Product code: M2198A1
- Full name: Bis-4-(N-carbazolyl)phenyl)phenylphosphine oxide
- Synonym: 9,9′-(4,4′-(Phenylphosphoryl)bis-(4,1-phenylene))bis(9H-carbazole)
- Molecular weight: 608.67 g/mol
- Glass transition temperature: Tg = 137 °C
- Absorption: λmax 292 nm in DCM
- Fluorescence: λmax 388 nm in DCM
- HOMO/LUMO: HOMO = 5.76 eV, LUMO = 2.19 eV
- Triplet energy: ET = 3.01 eV
- Classification: Carbazole derivatives, Bipolar host materials, Fluorescent host materials, Phosphorescent host materials, TADF materials, Organic printed electronics
- Product code: M2198A1
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