2PTZBN, also known as PTZ-BN or BN3 (CAS 2250280-17-0), is a green-emitting dopant for OLEDs based on multi-resonance thermally activated delayed fluorescence (MR-TADF). It is supplied as a sublimed orange powder or crystals with purity above 99% by HPLC, making it suited to vacuum-deposited emissive layers.
The molecule is built on a DABNA-1 type triarylboron core in which two sulfur atoms, placed opposite the nitrogen atoms, link the outer phenyl rings into a highly rigid framework. Incorporating these heavier atoms into the B-N multi-resonance system raises spin-orbit coupling and narrows the singlet-triplet gap (ΔEST = 0.15 eV), so reverse intersystem crossing reaches up to 2.8 × 10^5 s^-1 in toluene, faster than the oxygen-based analogue 2PXZBN.
In toluene it absorbs at 471 nm and emits at 510 nm. A reported device using 2PTZBN doped into a DMIC-TRZ host reached a maximum EQE of 34.6%, a turn-on voltage below 2.5 V and luminance above 100,000 cd m-2.
- Green emissive dopant in the active layer of MR-TADF OLED devices.
- Narrowband green emitter for high-efficiency OLED research with hosts such as DMIC-TRZ.
- Studies of the heavy-atom effect on reverse intersystem crossing in multi-resonance emitters.
- Co-host emissive layer research, for example mCBP:PO-T2T blends.
| Brand | Ossila |
|---|---|
| CAS number | 2250280-17-0 |
| Molecular formula | C30H17BN2S2 |
| Purity | Sublimed >99% (HPLC) |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | Orange powder/crystals |
| Storage | — |
- Product code: M2512A1
- Molecular Weight: 480.41 g/mol
- Decomposition Temperature: Td = 392 °C
- Absorption: λmax 471 nm (in toluene)
- Fluorescence: λem 510 nm (in toluene)
- HOMO: -5.19 eV
- LUMO: -2.73 eV
- ΔEST: 0.15 eV
- Synonyms: PTZ-BN, BN3
- Max EQE (DMIC-TRZ host device): 34.6%
- Max Current Efficiency (DMIC-TRZ host device): 124.9 cd/A
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