A5061070097- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Organic Electronics and Photovoltaics
- Laser Material Processing Techniques
- Dendrimers and Hyperbranched Polymers
- Additive Manufacturing Materials and Processes
- Conducting polymers and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-induced spectroscopy and plasma
- GaN-based semiconductor devices and materials
- Advanced biosensing and bioanalysis techniques
- Advanced Biosensing Techniques and Applications
- Dental materials and restorations
- Molecular Junctions and Nanostructures
Renishaw (United Kingdom)
2020
Heriot-Watt University
2020
University of St Andrews
2007-2010
University of Oxford
2009
The University of Queensland
2009
Solution-processable blue phosphorescent emitters with high luminescence efficiency are highly desirable for large-area displays and lighting applications. This report shows that when a fac-tris[1-methyl-5-(4-fluorophenyl)-3-n-propyl-1H-[1,2,4]triazolyl]iridium(III) complex core is encapsulated by rigid high-triplet-energy dendrons, both the physical photophysical properties can be optimized. The dendrons were composed of twisted biphenyl twisting arising from use tetrasubstituted branching...
Abstract Here, the charge transporting properties of a family highly phosphorescent iridium(III) complex‐cored carbazole dendrimers designed to have improved transport by incorporating units into dendrons are studied. Firstly, effect dendrimer generation and role dendron for materials with one per ligand core considered. It is shown, in contrast previously reported light‐emitting dendrimers, that this case carbazolyl‐based an active transport. Next, on attaching two explored. In latter case,...
A convergent strategy for the synthesis of three generations dendrons comprised carbazole moieties is described. The procedure to build involves an iterative palladium catalysed amination–debenzylation sequence using N-benzyl-3,6-dibromocarbazole. carbazolyl focussed are then attached a reactive fac-tris[2-phenylpyridyl]iridium(III) core by amination give dendrimers. have one, three, and seven units leading dendrimers with cores nine twenty one units. use 9,9′-dialkylfluorenyl surface groups...
A family of (1,10-phenanthroline)rhenium(I)(CO)3Cl complex cored first generation dendrimers with one, two or three dendrons have been prepared. The attached to the core are comprised biphenyl units 2-ethylhexyloxy surface groups at their distal ends. number and position attachment dendron was found an effect on properties dendrimers. When were both 2- 9-positions 1,10-phenanthroline ligand, thus straddling rhenium(I), became more electrochemically stable less susceptible solvatochromism....
We demonstrate that photoluminescence (PL) quantum yield and PL lifetime of fac-tris(2-phenylpyridyl) iridium(III) [Ir(ppy) <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ]-cored dendrimers in neat film dispersed into a 4,4'-bis(N-carbazolyl)biphenyl host can be significantly improved by simple adjustment the solution preparation. Quenching these materials is due to an energy transfer triplet excitons less-emissive sites reduced...
Due to the continually increasing popularity of metal powder-based additive manufacturing as a production process in recent years, there has been growing research into improving surface quality parts manufactured this way. Laser polishing offers great potential finishing technique due its flexibility and suitability for automation. However, complexity components that can be produced with processes presents challenges developing practical flexible arrangements implementing laser process. In...
We have investigated current–voltage ( I – V ) characteristics of unipolar and bipolar organic diodes that use phosphorescent dendrimers as the emissive layer. Through simulation measured we were able to determine device parameters for each structure studied, leading a better understanding injection transport behaviour in these devices. It was found common practice assuming barriers are equal difference between bare electrode work functions molecular orbital levels is unsuitable devices...
T. J. Ward, H. Coste, S. G. Stevenson and R. Slater, Analyst, 1934, 59, 66 DOI: 10.1039/AN9345900066
In recent years additive manufacturing (AM) has been a subject of increased interest and development as it offers many advantages over traditional subtractive machining techniques. As-built surface quality however is rarely suited to the desired application in majority cases (e.g. medical implants), requires post processing.Two main finishing methods are currently used if high level finish required: electrochemical polishing mechanical (abrasive) polishing. The former not selective, latter...