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General information
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Name:
NPB
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Full name:
N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine
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CAS number:
123847-85-8
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Chemical formula:
C44H32N2
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Molecular weight:
588.74 g/mol
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Absorption:
λmax = 339 nm
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Photoluminescence:
λmax = 450 nm in THF
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HOMO/LUMO:
HOMO = 5.5 eV, LUMO = 2.4 eV
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Synonyms:
NPD, α-NPB, α-NPD, N,N′-Bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine
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Classification:
Organic light-emitting diodes, Hole transport layer materials (HTL), Electron block layer materials (EBL), Hole injection layer materials (HIL), Organic field-effect transistor (OFET), Organic photovoltaics (OPV), Polymer solar cells, Perovskite solar cells, TADF materials
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Purity:
Sublimed: >99.5% (HPLC)
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Melting point:
279 - 283 °C
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Appearance:
Off-white powder
NPB >99.5% – High-Purity HTL, HIL, and EBL Material for OLED and Solar Applications
Noctiluca proudly introduces NPB, a high-purity (>99.5% sublimed) material engineered to deliver superior performance in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and perovskite solar cells. Formally known as N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine, with the molecular formula C₄₄H₃₂N₂ and CAS number 123847-85-8, NPB provides exceptional charge transport, energy efficiency, and structural stability.
Its versatile role as a Hole Transport Layer (HTL), Hole Injection Layer (HIL), and Electron Blocking Layer (EBL) makes NPB indispensable for cutting-edge optoelectronic applications requiring high reliability and extended operational performance.
Molecular Structure and Properties of NPB
NPB is a biphenyl-diamine derivative with a molecular weight of 588.74 g/mol and an off-white powder appearance. It features a prominent absorption peak (λₘₐₓ) at 339 nm and a photoluminescence emission maximum (λₘₐₓ) at 450 nm in THF.
The electronic properties of NPB are optimized for charge mobility, with a HOMO level of 5.5 eV and a LUMO level of 2.4 eV, ensuring efficient hole transport and electron blocking for OLED and solar cell applications.
Key Features of NPB
- High Purity and Material Quality: Noctiluca ensures NPB achieves a purity level of >99.5% through advanced sublimation and HPLC techniques. This high level of refinement guarantees stable performance, enhanced device longevity, and consistent results across OLED and photovoltaic applications.
- Optimized for HTL, HIL, and EBL Applications: NPB is meticulously designed to function as a Hole Transport Layer (HTL) and Hole Injection Layer (HIL), ensuring efficient hole mobility, balanced charge transport, and minimal energy loss. Additionally, its role as an Electron Blocking Layer (EBL) supports optimized device architecture and improved efficiency.
- Photoluminescent and Electronic Properties: With an emission peak at 450 nm, NPB provides stable photoluminescent properties, making it ideal for OLED displays. Its finely tuned HOMO/LUMO levels enhance device efficiency and support applications requiring precise charge injection and blocking capabilities.
- Robust Thermal Stability: NPB exhibits excellent thermal stability with a melting point of 279–283 °C, ensuring structural and functional integrity during demanding processing and operational conditions.
- Versatile Applications in Optoelectronics: Beyond OLED technology, NPB is suitable for use in organic photovoltaics (OPVs), perovskite solar cells, polymer solar cells, and organic field-effect transistors (OFETs). This versatility makes NPB an essential material for researchers and manufacturers developing next-generation energy-efficient devices.
The Role of NPB in Advanced Optoelectronic Technologies
NPB plays a critical role in the efficiency and stability of optoelectronic devices, including OLED displays, lighting systems, and solar cells. As a Hole Transport Layer (HTL) and Hole Injection Layer (HIL) material, NPB facilitates efficient hole mobility and charge injection, ensuring balanced charge transport and minimizing energy loss. Its additional role as an Electron Blocking Layer (EBL) further enhances charge separation and reduces recombination losses, contributing to improved energy efficiency and device performance.
Moreover, NPB’s high purity and robust thermal stability make it a preferred material for applications in organic photovoltaics (OPVs), polymer solar cells, and perovskite solar cells, where reliable performance under prolonged operational conditions is essential.
Conclusion
At Noctiluca, NPB >99.5% exemplifies our commitment to delivering high-performance materials for advanced OLED and photovoltaic applications. With outstanding purity, optimized charge transport properties, and exceptional thermal stability, NPB empowers researchers and manufacturers to achieve groundbreaking advancements in optoelectronic technologies.
Discover the benefits of NPB for your next-generation OLED, OPV, or solar cell projects and explore how Noctiluca’s premium materials are driving innovations in energy-efficient devices and high-performance displays.
