NAVIGATION

Products

Tel:
Fax:
Address:
Email: For product inquiries or a copy of our product catalog, please use our online system or send an email to .

4PACz

Product Name: 4PACz, (4-(9H-carbazol-9-yl)butyl)phosphonic acid
Catalog Number: ALCM20999364
CAS Number: 20999-36-4

Product Description

Chemical Structure of 4PACz

4PACz, formally known as (4-(9H-carbazol-9-yl)butyl)phosphonic acid, is a high-purity self-assembled monolayer (SAM) molecule engineered for use as a hole transport or extraction layer in next-generation optoelectronic devices. Its unique molecular architecture includes a carbazole terminal group, an n-butyl spacer, and a phosphonic acid anchoring group, making it a superior alternative to traditional interface materials such as PEDOT:PSS.

The carbazole moiety ensures effective interaction with organic semiconductors, while the phosphonic acid group enables strong chemical bonding with oxide electrode surfaces such as ITO. The flexible alkyl spacer improves monolayer packing via van der Waals forces, promoting enhanced stability and electronic performance.

When assembled as a monolayer on electrode surfaces, 4PACz improves hole extraction, increases optical transmittance, and reduces series resistance. These characteristics contribute to higher short-circuit current densities and fill factors in both non-fullerene acceptor (NFA) based organic solar cells and p-i-n perovskite solar cells.

Key Features

Enhanced Photovoltaic Efficiency: Outperforms PEDOT:PSS in both organic and perovskite solar cell architectures.
Tailored Energy Alignment: Suitable HOMO/LUMO levels for efficient interface engineering.
Excellent Solubility and Processability: Soluble in anhydrous ethanol, IPA, and IPA/DMF blends; supports low-temperature solution processing.
High Thermal Stability: High decomposition temperature ensures material integrity during fabrication.
Work Function Tuning: Adjusts ITO surface energetics for optimal hole extraction.

Product Information

Item	Details
CAS Number	20999-36-4
Catalog Number	ALCM20999364
Synonyms	(4-(9H-carbazol-9-yl)butyl)phosphonic acid
Chemical Formula	C16H18NO3P
Molecular Weight	303.29 g/mol
Purity	> 98% (HPLC)
Appearance	White powder
HOMO / LUMO	HOMO = 5.52 eV, LUMO = 2.08 eV
Absorption	Not available
Fluorescence	Not available