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925772

Sigma-Aldrich

N,N′-Tetra(4-biphenyl)benzidine

≥97%

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Synonym(s):
TBBDAz
Empirical Formula (Hill Notation):
C60H44N2
CAS Number:
164724-35-0
Molecular Weight:
793.00
MDL number:
MFCD11977303
NACRES:
NA.21

description

PL: 425 nm (in DCM)

Quality Level

100

Assay

≥97%

form

powder

color

white to light yellow

Orbital energy

HOMO 5.3 eV 
LUMO 2.2 eV 

UV absorption

λ: 357 nm Amax: in DCM

InChI

1S/C60H44N2/c1-5-13-45(14-6-1)49-21-33-55(34-22-49)61(56-35-23-50(24-36-56)46-15-7-2-8-16-46)59-41-29-53(30-42-59)54-31-43-60(44-32-54)62(57-37-25-51(26-38-57)47-17-9-3-10-18-47)58-39-27-52(28-40-58)48-19-11-4-12-20-48/h1-44H

InChI key

WXAIEIRYBSKHDP-UHFFFAOYSA-N

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Application

Having N,N′-bis-(3-methylphenyl)-N,N′-bis-phenyl-benzidine (TPD) like unit, TBBDA (BPBPA) is electron-rich. As a result, it is used as a hole-transport material in organic light-emitting diodes (OLED).
Example of OLED Device Performance:
ITO/DNTPD (60 nm)/BPBPA (30 nm)/mCBP (10 nm)/mCBP:Ir(dbi)3 (30 nm)/LG201 (35 nm)/
LiF (1 nm)/Al (200 nm)
Color: blue
EQE: Not known
Turn-On Voltage: 2.8V
Max. Luminance: ~ 9900 Cd/m2

Besides, for organic solar cell (OSCs) applications, its highest occupied molecular orbital energy value at 5.3 eV is well matched with a donor layer and its high mobility of 1.74 × 10-2 cm2/Vs brings out an easy and rapid extraction of holes from the donor material.
N,N′-Tetra(4-biphenyl)benzidine can be used as an emissive layer or hole transporting material in studies such as organic light-emitting diodes (OLEDs), photovoltaics, organic field-effect transistors (OFETs).

WGK

WGK 3

Regulatory Information

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Four times lifetime improvement of blue phosphorescent organic light-emitting diodes by managing recombination zone.
Jeon S K, et al.
Organic Electronics, 27, 202-206 (2015)
Superb lifetime of blue organic light-emitting diodes through engineering interface carrier blocking layers and adjusting electron leakage and an unusual efficiency variation at low electric field.
Kim T,et al.
Journal of Material Chemistry C, 6, 8472-8478 (2018)

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