4CzTPN-tBu (2,3,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,4-dicyanobenzene, CAS 2153433-46-4) is an orange-emitting dopant for thermally activated delayed fluorescence (TADF) OLEDs. It is the tert-butylated version of 4CzTPN, carrying eight bulky tert-butyl groups around its periphery that add steric hindrance and improve solubility in most common organic solvents, making it suitable for solution-processed devices.
Used as an orange emitter doped into the sky-blue TADF host TCP-BP-SFAC, 4CzTPN-tBu helped reach a record power efficiency of 130.7 lm W-1 in a white device. This result is attributed to the host's balanced ambipolar transport and high solid-state efficiency, together with reduced exciton quenching from the electron-trapping behaviour of 4CzTPN-tBu.
The material is supplied unsublimed with purity above 98.0% (1H NMR) as an orange powder or crystals. It is an isomer of 4CzPN-tBu and 4CzIPN-tBu.
- Orange dopant in the emitting layer of TADF OLEDs.
- Component of white TADF OLEDs combined with sky-blue TADF hosts such as TCP-BP-SFAC.
- Fabrication of solution-processed organic light-emitting devices thanks to its good solubility.
- Research into single-emissive-layer white OLEDs and energy transfer between TADF dopants.
| Brand | Ossila |
|---|---|
| CAS number | 2153433-46-4 |
| Molecular formula | C88H96N6 |
| Purity | Unsublimed >98.0% (1H NMR) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Orange powder/crystals |
| Storage | — |
- Product code: M2251B1
- Full Name: 2,3,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,4-dicyanobenzene
- Synonyms: 4CzTPN-Bu, 4CzTPNBu, p4TCzPhBN
- Molecular Weight: 1237.74 g/mol
- Absorption: λmax 282 nm in toluene
- Fluorescence: λem 565 nm in toluene
- HOMO/LUMO: HOMO = 5.50 eV, LUMO = 3.30 eV
- Classification / Family: Carbazole derivatives, Terephthalonitriles, TADF materials, Orange to red dopant materials, Sublimed materials
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