Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
[CAS# 155090-83-8]

Identification

• Classification: Pharmaceutical intermediate >> Heterocyclic compound intermediate >> Thiophene compound
• Name: Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
• Synonyms: PEDT/PSS
• CAS Registry Number: 155090-83-8
• EC Number: 629-200-1
• SMILES: C1COC2=CSC=C2O1.C1=CC=C(C=C1)/C=C/S(=O)(=O)O

Safety Data

• Hazard Symbols: GHS09 Warning
• Risk Statements: H314-H318
• Safety Statements: P260-P264-P264+P265-P280-P301+P330+P331-P302+P361+P354-P304+P340-P305+P354+P338-P316-P317-P321-P363-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin corrosion	Skin Corr.	1B	H314
Serious eye damage	Eye Dam.	1	H318
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412

Discovery and Applications

Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) is a conductive polymer that has gained significant attention for its versatility and performance in various electronic and optoelectronic applications. The discovery of PEDOT:PSS dates back to the late 20th century when researchers sought to develop organic materials capable of conducting electricity while maintaining the processability and flexibility of polymers. This compound is formed through the combination of two key components: 3,4-ethylenedioxythiophene (EDOT), a conductive monomer, and poly(styrenesulfonate) (PSS), a polyelectrolyte that stabilizes the conductive polymer.

PEDOT:PSS is synthesized through a polymerization process that involves oxidative coupling of EDOT monomers in the presence of PSS. The resulting material consists of PEDOT, which provides the electrical conductivity, and PSS, which serves as a stabilizing agent by preventing aggregation of the conductive polymer chains. The interaction between PEDOT and PSS not only imparts electrical conductivity to the material but also enhances its processability in aqueous solutions, making it suitable for a wide range of applications.

One of the primary uses of PEDOT:PSS is in organic electronics, where it is employed as a conductive layer in devices such as organic light-emitting diodes (OLEDs), organic solar cells, and organic field-effect transistors (OFETs). Its excellent conductivity, combined with its ability to be processed in aqueous solutions, makes it an ideal candidate for flexible and lightweight electronic devices. PEDOT:PSS is also used in transparent conductive films, which are vital components in touchscreens, displays, and solar cells.

In addition to its use in electronics, PEDOT:PSS is employed in the development of sensors and actuators. Due to its ability to conduct electricity and respond to external stimuli, PEDOT:PSS is incorporated into various sensing technologies, including biosensors and chemical sensors. Its flexibility and biocompatibility also make it a promising material for medical applications, such as in bioelectronics and wearable devices.

PEDOT:PSS is also increasingly used in energy storage devices, including supercapacitors and batteries. Its high conductivity and stability under cycling conditions contribute to the development of efficient and long-lasting energy storage systems. Moreover, its use in transparent and flexible electronics is an area of growing interest, as it enables the creation of bendable and lightweight devices that are suitable for a variety of applications in the emerging field of wearable electronics.

The discovery and development of PEDOT:PSS have revolutionized the field of organic electronics, offering a cost-effective and flexible alternative to traditional inorganic conductors. Its unique combination of electrical conductivity, flexibility, and processability has made it a key material in numerous innovative applications, from energy-efficient electronics to advanced sensor technologies.

References

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