4H-Cyclopenta[1,2-b:5,4-b']dithiophene
CAS Number 389-58-2
Chemistry Building Blocks, Heterocyclic Building Blocks, Monomers
Quality assured
Expert support
Volume discounts
Worldwide shipping
Fast and secure
High purity CPDT monomer used in OFETs and organic electronics
Available online for fast, secure dispatch
4H-cyclopenta[2,1-b:3,4-b′]dithiophene, also known as CPDT (CAS number 389-58-2), a rigid coplanar structure favouring π−π intermolecular interactions with good electron-donating properties, has been one of the most attractive building blocks for organic field effect transistors and organic electronics. The five-member ring in the middle also offer the function to have side-chain manipulation to enhance solubility in solutions for device fabrications, morphology and polymer processing. One of the intensively studied polymers for organic electronics, PCPDTBT, with the alternating CPDT and 2,1,3- benzothiadiazole (BT) units, has demonstrated device performance of PCE over 6% [5]
Recently, the CPDT backboned polymer, CPE-K, has been incorporated as the electron hole transporting layer (HTL) in the polymer/fullerene BHJ and perovskite solar cells. The devices using CPE-K HTL show competitive performance compared with that using PEDOT:PSS HTL. As an alternative to PEDOT:PSS, the use of CPE-K as an organic hole transport material enables the formation of uniform perovskite films with complete surface coverage for an efficient, stable perovskite/fullerene planar heterojunction solar cell [1, 2]
4H-cyclopenta[2,1-b:3,4-b′]dithiophene is the intermediate for the synthesis of 4,4'-alkyl-cyclopenta[2,1-b:3,4-b′]dithiophene [6].
A synthesis precusor
For cyclopentadithiophene backboned polymers
Cyclopentadithiophene building block
For semiconductors, OFETs, and solar cells
Worldwide shipping
Quick and reliable shipping
High purity
>99% High purity
General Information
CAS Number |
389-58-2 |
Chemical Formula | C9H6S2 |
Molecular Weight | 178.27 g/mol |
Synonym | 4H-Cyclopenta[2,1-b:3,4-b']dithiophene 4H-Thieno[3',2':4,5]cyclopenta[1,2-b]thiophene 3,4-Dithia-7H-cyclopenta[a]pentalene CPDT |
Classification / Family | Monomers, Building blocks, Heterocycles, Chemical synthesis for low-band gap polymers, Thiophene, Intermediates for high performance Organic Photovoltaics, OFETs, Polymer solar cells |
Chemical Structure
Product Details
Purity | >99% |
Melting Point | 71.0 °C - 75.0 °C |
Appearance | Off-white powder |
NMR Characterisation
MSDS Documentation
4H-Cyclopenta[1,2-b:5,4-b']dithiophene MSDS sheet
Literature and Reviews
- Conjugated polyelectrolyte hole transport layer for inverted-type perovskite solar cells, H. Choi et al., Nat. Commun., DOI: 10.1038/ncomms8348, 6, 7348 (2015)
- Conductive conjugated polyelectrolyte as hole-transporting layer for organic bulk heterojunction solar cells, H. Zhou, et al., Adv. Mater. , 26, 780–785(2014)
- Improved Photovoltaic Performance of a Semicrystalline Narrow Bandgap Copolymer Based on 4H-Cyclopenta[2,1-b:3,4- b′]dithiophene Donor and Thiazolo[5,4-d]thiazole Acceptor Units, S. V. Mierloo et al., Chem. Mater., 24, 587−593 (2012).
- Synthesis and characterization of a series of low-bandgap copolymers based on cyclopenta[2,1-b:3,4-b']dithiophene and thienopyrroledione for photovoltaic applications, Y-R. Hong et al., Solar Energy Materials & Solar Cells 102, 58–65 (2012)
- Alternating Copolymers of Cyclopenta[2,1-b;3,4-b´]dithiophene and Thieno[3,4-c]pyrrole-4,6-dione for High-Performance Polymer Solar Cells, Z. Li, et al., Adv. Func. Mater., 21, 3331–3336(2011)
-
Highly efficient and facile alkylation of 4Hcyclopenta-[2,1-b:3,4-b0]dithiophene in water, T. B. Raju et al., RSC Adv., 4, 37738 (2014).
Related Products
We stock a wide range of monomers available to purchase online. Please contact us if you cannot find what you are looking for.