Novel Nano-Phase Ordered Polymer Systems for Efficient Photovoltaic Applications
Abstract
A novel polythiophene -DBAB- type block copolymer system has been developed, where D is a new sulfide derivatized polythiophene donor block, A is a fluorine derivatized polythiophene acceptor block, and B is a non conjugated and flexible bridge chain. In donor block, a dithiathiophene ring derivatized polythiophene was used due to it is chemically more stable than the no-ring analogs. This structure also drastically limits the large steric hindrance in non-cyclized ones and is expected to result in high electrical conductivity. Additionally, the monomers have no possibility for alpha,beta' or beta, beta' coupling during the polymerization. Sulfur is also known to be more electron donating and electro polarizable then oxygen. Most importantly, a fluorine derivatized polythiophene acceptor block has also been successfully developed. The fluorine substituted groups are known to be more easily phase separated from hydrocarbon groups due to their hydrophilicity differences, therefore, nano phase separation between the donor and acceptor blocks would be greatly enhanced. The newly developed polythiophenes have been characterized using spectroscopic, electrochemical, and electron microscopic methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 07, 2005
- Accession Number
- ADA430986
Entities
People
- Sam Sun
Organizations
- Norfolk State University