Novel Abiotic Devices Based on Doped Dendrimers and Hyperbranched Polymers

Period of Performance: 03/24/2000 - 09/23/2000

$65K

Phase 1 SBIR

Recipient Firm

Altair Center, LLC
1 Chartwell Circle
Shrewsbury, MA 01545
Principal Investigator

Abstract

ALTAIR Center proposes to develop new dendritic and hyperbranched materials with cascade, tree-like architecture for two complementary abiotic devices: light emitting diodes (LED) and photovoltaic cells (PV cells) having important military and civilian applications. The proposed approach takes advantage of two novel findings in this field: light-harvesting effect and segregation of the emissive core molecules/Ln ions by dedritic shell. Both processes offer a way of enhancing the luminescence by vectorial exciton migration to the core (energy acceptor, reaction center) and preventing selfquenching of the emissive core molecules/Ln ions. We will use specially designed high emissive dendrimers with dye or Eu3+/Tb3+ ions based core providing efficient light harvesting similar to bacteriorhodopsin and other natural photosynthetic systems. In Phase I of the project we will develop novel perfluorinated polyphenylenepolygermane (PPG) and polyphenyl dendritic and hyperbranched polymers doped with specific dye or lantanide ions for application in the abiotic devices. In Phase II the developed technology will be applied to fabrication of a prototype abiotic device for immediate application at DoD - LED based on doped hyperbranched polymers/dendrimers with light-harvesting effect. Polymer light emitting devises have an important niche market including TV and computer displays. In additional to immediate military application as novel LED and light-harvesting systems (artificial photosynthetic antenna, photoconverters, optical data storage devices) the proposed systems will find numerous applications in electronic and medical industry.