Light-emitting fabrics principles

The rectification properties of semiconductor interfaces are the most important electrical characteristic of semiconductor contacts. Certain types of devices, such as transistors, require both ohmic and rectifying contacts on a given semiconductor surface, whereas other devices, such as Schottky barriers, are based on the inherent rectification properties of semiconductor/metal Junctions. Numerous photonic devices, such as photon detectors and photovoltaic cells, require rectification at a semiconductor Junction, and light-emitting diodes require both ohmic contacts and rectifying Junctions in a well-defined geometry. Thus, successful fabrication of a desired device structure depends entirely on the electrical properties of the specific semiconductor contacts that are formed in the process. The principles described above allow the rational fabrication of contacts with the desired properties, and also describe the operation of the resulting devices within a simple, chemically intuitive, kinetic framework. 

The principle developed here is to integer multiple optical fibre loops and curves within a thin textile substrate, the light being released by macrobendings, as illustrated in Fig. 4.12. With embroidery, the patterns described by the fibres (curves, loops, zigzags etc.) and the substrates (textile, membrane, paper etc.) to which they are stitched define the characteristics of the light emitted by the whole fabric. 

In recent years, great progress has been achieved in the preparation of various types of polymer nanocomposites and in understanding the basic principles that determine their optical, electronic, and magnetic properties. As a result, nanocomposite-based devices such as light-emitting diodes (LEDs), photodiodes, and photovoltaic (PV) solar cells have been fabricated and their properties characterized. 

The production of flat-panel cathode ray tubes (CRTs) is essentially a fabrication issue. The basic principle of operation is the same as a standard CRT. Electrons are emitted from a hot cathode. These are guided by a magnetic field to the glass screen coated in a layer of phosphorescent material. Upon impact the energy of the electron is transferred to the phosphor and light is emitted. A regular pattern of red, green and blue phosphors creates a dense pattern of... 

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