Picture of DNA strand

Pioneering chemical biology & medicinal chemistry through Open Access research...

Strathprints makes available scholarly Open Access content by researchers in the Department of Pure & Applied Chemistry, based within the Faculty of Science.

Research here spans a wide range of topics from analytical chemistry to materials science, and from biological chemistry to theoretical chemistry. The specific work in chemical biology and medicinal chemistry, as an example, encompasses pioneering techniques in synthesis, bioinformatics, nucleic acid chemistry, amino acid chemistry, heterocyclic chemistry, biophysical chemistry and NMR spectroscopy.

Explore the Open Access research of the Department of Pure & Applied Chemistry. Or explore all of Strathclyde's Open Access research...

Laser characteristics of a family of benzene-cored star-shaped oligofluorenes

Tsiminis, Georgios and Montgomery, Neil A. and Kanibolotsky, Alexander L. and Ruseckas, Arvydas and Perepichka, Igor F. and Skabara, Peter J. and Turnbull, Graham A. and Samuel, Ifor D. W. (2012) Laser characteristics of a family of benzene-cored star-shaped oligofluorenes. Semiconductor Science and Technology, 27 (9). ISSN 0268-1242

Full text not available in this repository.Request a copy from the Strathclyde author

Abstract

A family of star-shaped conjugated oligofluorene molecules based around a central benzene core is studied with the aim of identifying how changes in molecular structure can affect the laser performance of organic materials. As the oligofluorene arm length increases the optical transitions are found to move to longer wavelength, there is an increase in photoluminescence quantum yield and a corresponding reduction in the excitation density for amplified spontaneous emission. Distributed-feedback lasers based on these materials are tunable across 402-462 nm with lasing thresholds as low as 1.1 kW cm(-2) and efficiencies as high as 6.6%. The laser performance is compared with that of family of star-shaped molecules with different core structure. This shows that a reduction in intermolecular interactions is very important to achieving high performance lasing in organic semiconductors.