BCzTPA, or 4,4'-(9H,9'H-3,3'-Bicarbazole-9,9'-diyl)bis(N,N-diphenylaniline), is an electron-rich carbazole derivative supplied by Ossila as a sublimed host material for phosphorescent organic light-emitting diodes (PhOLEDs). It is a white powder or crystalline solid with a purity above 99.0% by HPLC.
Structurally, BCzTPA is closely related to BCzPh: both are built on a 3,3'-bicarbazole core, but BCzTPA carries triphenylamine groups at the 9H and 9H' positions where BCzPh has phenyl groups. With a HOMO of 5.60 eV and a LUMO of 2.20 eV, it serves well as a host for green, blue and white phosphorescent emitters.
Reported green PhOLEDs using 17 wt% Ir(ppy)3 doped into BCzTPA reach 5000 cd/m2 below 3 V, demonstrating very low operating voltage. Because it is electron-rich, BCzTPA is also a candidate electron donor for forming exciplexes, either as the emitting layer or as a host in efficient fluorescent and phosphorescent OLEDs.
- Host material for green phosphorescent OLEDs doped with Ir(ppy)3 for low-voltage operation.
- Co-host with BCzTPh in solution-processed blue PhOLEDs using FIrpic.
- Co-host in solution-processed white OLEDs combining several iridium emitters.
- Electron donor for exciplex formation in emitting layers or host systems of fluorescent and phosphorescent OLEDs.
| Brand | Ossila |
|---|---|
| CAS number | 1032174-52-9 |
| Molecular formula | C60H42N4 |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | White powder/crystals |
| Storage | — |
- Product code: M2334A1
- Full name: 4,4'-(9H,9'H-3,3'-Bicarbazole-9,9'-diyl)bis(N,N-diphenylaniline)
- Molecular weight: 819.00 g/mol
- Absorption: λ max 310nm, 341 nm (in film)
- Phosphorescence: λ max 397 nm (in film)
- HOMO/LUMO: HOMO 5.60 eV, LUMO 2.20 eV
- Thermal properties: Tg = 157 °C, Tm = 239 °C
- Order code: M2334A1
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