Germafluorenes: New Heterocycles for Plastic Electronics
Citations Over TimeTop 1% of 2010 papers
Abstract
The synthesis and characterization of new heterofluorene derivatives based on germanium are described. These germafluorene monomers have been polymerized with different aromatic comonomers. The resulting homopolymers and alternating copolymers have been characterized by size exclusion chromatography, thermal analyses (TGA and DSC), UV−vis−NIR absorption spectroscopy, X-ray diffraction, and cyclic voltammetry. These homopolymers and copolymers are air-stable and present bandgaps ranging from 3.0 to 1.6 eV. Some copolymers were tested in field-effect transistors (FETs) and bulk heterojunction photovoltaic cells (PCs). Best results in FETs were obtained with poly[2,7-(9,9-di-n-butylgermafluorene)-alt-3,6-bis(thiophen-5-yl)-2,5-dioctylpyrrolo[3,4-]pyrrole-1,4-dione], which shows a hole mobility up to 0.04 cm2 (V·s)−1 with an Ion/Ioff ratio of 1.0 × 106. For photovoltaic applications, the best results were obtained with poly[2,7-(9,9-di-n-octylgermafluorene)-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] with a power conversion efficiency (PCE) of 2.8%.
Related Papers
- → Electrochemical deposition of Ag nanoparticles on ITO-coated glass: effect of different cyclic voltammetry scan rates on Ag deposition(2023)26 cited
- → Convolutive cyclic voltammetry studies of PVA/CuI polymer composites at gold electrode(2013)1 cited
- → Observation of Morphology Changes of Working Electrode during Cyclic Voltammetry by Using AFM(2014)
- Effects of inorganic additives on the cyclic voltammetry curves of lead negative(2003)
- → Reversible dimerization of phenoxyl radicals formed by anodic oxidation of phenolates A quantitative study by cyclic voltammetry(1984)