N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine
N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine (CAS: 139255-17-7) is a high-purity organic compound with the molecular formula C44H32N2 and a molecular weight of 588.74 g/mol. This material functions primarily as a hole transport layer within organic light-emitting diode (OLED) devices. Its precise chemical structure facilitates efficient charge mobility, crucial for the performance and longevity of optoelectronic applications.
- IUPAC
- N,N′-Bis(naphthalen-2-yl)-N,N′-bis(phenyl)benzidine,beta-NPB
- Synonyms
- 1′-biphenyl-4,4′-diamine,N,N′-Bis(naphthalen-2-yl)-N,N′-bis(phenyl)benzidine,beta-NPB

OLED Hole Transport Layer (HTL)
This compound is extensively utilised as a hole transport material in the fabrication of organic light-emitting diodes (OLEDs). It facilitates the efficient movement of holes from the anode to the emissive layer, contributing to device efficiency and stability.
Organic Electronics Component
Beyond OLEDs, its properties make it suitable for other organic electronic applications, including organic photovoltaics (OPVs) and organic field-effect transistors (OFETs), where charge transport is a critical factor.
Research and Development
N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine serves as a valuable reagent in materials science research, particularly for developing novel optoelectronic devices and understanding charge transport mechanisms in organic semiconductors.
| Molecular weight | 588.74 |
|---|---|
| Empirical formula | C44H32N2 |
| Assay | 99% (HPLC) |
| Application | This material is used as a hole transport layer in a variety of OLED devices1,2 |
| Melting point | 168-175 °C |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine primarily used for?
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This compound is primarily used as a hole transport layer in organic light-emitting diode (OLED) devices.
What is the CAS number and molecular formula?
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The CAS number is 139255-17-7, and the molecular formula is C44H32N2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with a minimum assay of 99% (HPLC). We do not represent this product as USP, BP, or EP grade.
What are the safety and handling precautions?
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According to available data, this substance is classified under WGK 3 in Germany, indicating a high hazard to water. Standard laboratory precautions for handling organic chemicals should be followed, including use in a well-ventilated area and appropriate personal protective equipment.
Is this product available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and reagents, including N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine.
How can I request a sample or quote?
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Please contact our sales team via the website or direct email to request a sample or a quotation for N,N′-Di(2-naphthyl-N,N′-diphenyl)-1,1′-biphenyl-4,4′-diamine.
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