Available in sublimed grade for highly efficient TADF-OLED devices, 4,5-bis[4-(N-phenoxazine)phenyl]phthalonitrile, CAS No.1784766-39-7, Sublimed ≥99.0%

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Px-VPN has a similar structure to 2CzPN with two electron-withdrawing nitrile groups at 1,2-positions and two electron-donating N-phenylphenoxazine groups 4,5-positions of the benzene ring. The phenyl groups separating the electron-donating phenoxazine and electron-withdrawing phthalonitrile are acting as π bridges to the structure of A-π-D. Phenoxazines are stronger electron donating than carbazoles, Px-VPN is a TADF green emitter (λmax PL = 540 nm) while Cz-VPN is blue (λmax PL = 450 nm).

With a smaller ΔEST, the delayed emission lifetime of the green-emitting Px-VPN film found to be much shorter than those of the blue-emitting Cz-VPN, suggesting a more efficient T1 to S1 up-conversion. TADF green light-emitting device based on Px-VPN as the dopant and mCP as the host achieved a high EQE of 14.9%.

General Information

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CAS Number	1784766-39-7
Chemical Formula	C44H26N4O2
Molecular Weight	624.7 g/mol
Absorption	λmax 304 nm, 406 nm in toluene [1]
Fluorescence	λmax 577 nm in toluene [1]
HOMO/LUMO	HOMO = 5.70 eV, LUMO = 3.30 eV [1]
Full Name	4,4''-Di-10H-phenoxazin-10-yl[1,1':2',1''-terphenyl]-4',5'-dicarbonitrile
Synonyms	4,5-Bis[4-(N-phenoxazine)phenyl]phthalonitrile
Classification / Family	Phenoxazine derivatives, TADF green dopant, TADF Host, Sublimed materials

Chemical Structure

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Chemical Structure of 4,4''-Di-10H-phenoxazin-10-yl[1,1':2',1''-terphenyl]-4',5'-dicarbonitrile (Px-VPN), CAS 1784766-39-7

Product Details

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Purity	Sublimed* >99.0% (HPLC)
Melting Point	N/A
Appearance	Orange powder/crystals

*Sublimation is a technique used to obtain ultra-pure grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Device Structure

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Device Structure	ITO (110 nm)/NPD (40 nm)/mCP (10 nm)/Px-VPN:mCP (6wt%, 20 nm)/PPF (10 nm)/TPBi (30 nm)/LiF (0.8 nm)/Al (100 nm) [1]
Colour	Green
Max. EQE	14.9%
Max. Current Efficiency	45.4 cd/A
Max. Power Efficiency	26.7 Im/W