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Cl-2PACz

Product Name: Cl-2PACz, (2-(3,6-dichloro-9H-carbazol-9-yl)ethyl)phosphonic acid
Catalog Number: ALCM3036926721
CAS Number: 3036926-72-1

Product Description

Chemical Structure of Cl-2PACz

Cl-2PACz, formally known as 2-(3,6-dichloro-9H-carbazol-9-yl)ethylphosphonic acid, is a halogenated self-assembled monolayer (SAM) material engineered for high-efficiency optoelectronic applications. It features a 3,6-dichloro-carbazole end group, a phosphonic acid anchoring group, and an ethyl spacer, enabling strong and stable bonding to conductive surfaces such as indium tin oxide (ITO).

Serving as a hole-selective interfacial layer, Cl-2PACz has proven to be a highly effective alternative to PEDOT:PSS in both non-fullerene organic solar cells (NFA-OSCs) and p-i-n structured perovskite solar cells. Its halogen-substituted carbazole structure supports strong noncovalent interactions—such as Cl···S and Cl···π contacts—enhancing both intra- and intermolecular packing, which promotes more efficient hole extraction and charge transport across the interface.

Key Features

High Hole Mobility: Chlorine-induced noncovalent interactions support enhanced charge transport and improved interfacial ordering.
Superior Device Performance: Enables higher power conversion efficiencies (PCEs) than PEDOT:PSS.
Improved Operational Stability: Devices using Cl-2PACz exhibit greater photostability and operational lifetimes under continuous white light exposure.
Solution Processable at Low Concentration: Effective at forming dense, uniform monolayers from dilute solutions (typically 1 mM), suitable for scalable and low-temperature fabrication.

Product Information

Item	Details
CAS Number	3036926-72-1
Catalog Number	ALCM3036926721
Synonyms	(2-(3,6-Dichloro-9H-carbazol-9-yl)ethyl)phosphonic acid
Chemical Formula	C14H12Cl2NO3P
Molecular Weight	344.13 g/mol
Purity	> 98% (HPLC)
Appearance	White powder
HOMO / LUMO	HOMO = 6.05 eV, LUMO = 2.67 eV
Absorption	λmax = 360 nm (in ethanol)
Fluorescence	Not available

Application Highlights

Cl-2PACz is well-suited for use as a hole transport or extraction layer in:

Non-fullerene organic solar cells (NFA-OSCs)
p-i-n perovskite solar cells
Other organic electronic devices requiring efficient and stable hole-selective interfaces

It is especially advantageous as a PEDOT:PSS replacement in ITO-based architectures, where it provides improved energy alignment, reduced interfacial recombination, and better long-term stability.

Why Choose Alfa Chemistry?

High-Quality Standards
Reliable Supply & Global Delivery
Technical Expertise & Scientific Support
Custom Synthesis and Bulk Availability

Alfa Chemistry delivers high-purity SAM materials tailored for advanced optoelectronic devices—backed by scalable synthesis capabilities and deep application know-how.

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