FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


Product Code M2436A1-500mg
Price $188 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


An Electron-Rich Triarylamine Derivative

Widely used as hole transport layer in OLEDs and solar cells


BPBPA is a benzidine derivative with two amines substituted by four biphenyl groups. It demonstrates high charge carrier mobility of 1.74 ×10−2 cm2/V⋅s, enabling rapid hole-extraction from the adjacent donor layer. This results in an enhanced open-circuit voltage and leads to an improvement of powder conversion efficiency (PCE) of 9% with reference devices.

BPBPA is commonly used as a hole transport layer (HTL) material in OLEDs. The molecule has a highest occupied molecular orbital (HOMO) energy value at −5.5 eV and a lowest unoccupied molecular orbital (LUMO) energy value at −2.0 eV. The work function of BPBPA conveniently matches with other materials, making it suitable as a reference HTL in the investigation of high-efficiency fluorescent emitters.

Hole transport material

Hole transport material

Applied in OLEDs and solar cells

Worldwide shipping for 164724-35-0

Worldwide shipping

Quick and reliable shipping

Demonstrate high carge carrier mobility

High carge carrier mobility

1.74 ×10−2 cm2/V⋅s

Sublimed grade purity 164724-35-0

Sublimed grade purity

>99.5% Grade purity

General Information

CAS Number 164724-35-0
Full Name N,N,N',N'-Tetra(4-biphenylyl)-4,4'-biphenyldiamine
Chemical Formula C60H44N2
Molecular Weight 793.03 g/mol
Purity Sublimed >99.5% (HPLC)
Charge Carrier Mobility μ = 1.74 × 10−2 cm2/V⋅s [1]
HOMO/LUMO

HOMO = −5.5 eV

LUMO = −2.0 eV [1]

Melting Point Tm = 265 °C
Appearance Off-white powder
Synonyms N,N,N',N'-Tetrakis(4-biphenylyl)benzidine, N4,N4,N4',N4'-Tetra[(1,1'-biphenyl)-4-yl]-(1,1'-biphenyl)-4,4'-diamine, N,N'-Tetra(4-biphenyl)benzidine, 4-Phenyl-n-(4-phenylphenyl)-N-[4-[4-(4-phenyl-N-(4-phenylphenyl)anilino)phenyl]phenyl]aniline, TBB, TBBDA
Classification or Family Hole transport layers, Hole extraction materials, Sublimed materials, Semiconducting molecules, Benzidines, OLEDs, Solar cells

Chemical Structure

BPBPA chemical structure, CAS 164724-35-0
BPBPA chemical structure, CAS 164724-35-0

Device Structure(s)

Device Structure ITO (50 nm)/BPBPA (30%):HATCN (40 nm)/BPBPA (10 nm)/TNPA (10 nm)/a-ADN:IDCz-2DPA (5%) (30 nm)/TNPT (5 nm)/ZADN (20 nm)/LiF(1.5 nm)/Al (200 nm) [2]
Colour Blue light emitting device Blue
External Quantum Efficiency 5.6%
Current Efficiency 6.4 cd/A
Maximum Luminance 47600 cd/cm-2
Turn On Voltage 3.0 V
Device Structure ITO/DNTPD (60 nm)/BPBPA (20 nm)/PCzAC (10 nm)/mCBP:PTZ-TRZ(30 nm)/DBF-Trz (5 nm)/ZADN (30 nm)/LiF:Al [5]
Colour Blue light emitting device Blue
External Quantum Efficiency 13%
Current Efficiency 42 cd/A
Power Efficiency 20 lm/W
Voltage at 200 cd/cm-2 2.53 V

*For chemical structure information, please refer to the cited references.

MSDS Documentation

BPBPABPBPA MSDS Sheet

Pricing

Product Code Quantity Price
M2436A1 500 mg £150
M2436A1 1 g £250
M2436A1 2 g £400
M2436A1 5 g £800

Literature and Reviews

  1. High mobility hole extraction material for organic solar cell application, G. Kim et al., Mol. Cryst. Liq. Cryst., 565 (1), 14–21 (2012); DOI: 10.1080/15421406.2012.690989.
  2. A novel fluorene–indolocarbazole hybrid chromophore to assemble high efficiency deep-blue fluorescent emitters with extended device lifetime, V. Patil et al., J. Mater. Chem. C, 8, 3051 (2020); DOI: 10.1039/c9tc06434f.
  3. Isomeric fused benzocarbazole as a chromophore for blue fluorescent organic light-emitting diodes, V. Patil et al., J. Mater. Chem. C, 8, 8320 (2020); DOI: 10.1039/d0tc01268h.
  4. Unveiling the root cause of the efficiency-lifetime trade-off in blue fluorescent organic light-emitting diodes, S. Kang et al., Electron. Mater. Lett., 16, 1–8 (2020); DOI: 10.1007/s13391-019-00180-5.
  5. Conformation-dependent degradation of thermally activated delayed fluorescence materials bearing cycloamino donors, S. Hwang et al., Commun. Chem., 3, 53 (2020); DOI: 10.1038/s42004-020-0303-4.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

Return to the top