Recently, researchers from Karlsruhe Institute of Technology (Kr) in Germany and the University of Toronto in Canada have successfully produced highly efficient silicon-based light-emitting diodes (SiLEDs) with silicon nanocrystals. The diode does not contain heavy metals, but emits multiple colors of light.
Although silicon (Si) dominates the microelectronics and photovoltaic industries, it has long been considered unsuitable for the manufacture of light-emitting diodes. However, this is not true at the nanometer scale. Tiny silicon nanocrystals composed of hundreds of atoms can generate light and have great potential to be efficient light emitters. To date, the manufacture of silicon-based light-emitting diodes has been limited to the red visible spectral range and near-infrared rays, so the manufacture of diodes that emit colored light is absolutely novel.
KIT scientists have discovered that by using monodisperse nanoparticles of different sizes, the color of the light emitted by the diode can be changed. It can be tuned from the deep red spectral region to the orange spectral region, and the external quantum efficiency can also reach 1.1%. It is worth mentioning that the fabricated silicon-based light-emitting diodes have surprisingly long-term stability, which has never been achieved before. The increase in the life of the operating components is due to the use of only nanoparticles of the same size, which effectively enhances the stability of sensitive thin film components, while oversized particles that can cause short circuits are excluded.
In addition, the interesting aspect of the new type of light-emitting diode is also the homogeneity of its light-emitting area. Researchers say that as liquid-treated silicon-based light-emitting diodes can be fabricated at low cost and in large quantities, nanoparticle "groups" will also enter new fields, and the potential will be difficult to estimate, while textbooks may describe semiconductor components. It will also be rewritten.
D-sub Connector Contacts
D-sub Connector Contacts
A D-sub connector is a form of connector commonly found in electronic and computer systems. It consists of a D shaped metal band and two or more parallel rows of either pin contacts (male) or socket contacts (female). D-sub connector contacts can vary in size, material, current rating, length and resistance.
The most common type of connector is the crimp contact. These are assembled by inserting a stripped wire end into the cavity at the rear of the contact. The cavity is then crushed using a crimp tool, gripping the contact to the wire.
What are D-sub connector contacts used for?
The D-sub connector contacts carry the signal from the source to the destination across the D–sub connection.
Types of D-sub connector contacts
Most D-sub connectors are supplied with contacts ready in place. Contacts can be replaced if damaged or if the application of the D-sub connector is to be changed from the original design specification.
High-current, high-voltage, or co-axial inserts require larger contacts. The material of the D-sub connector contact can be changed if the robustness or quality of the connection needs to be improved.
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