The smallest LED how small?

Today, light emitting diode ( 领导) A large number of applied to daily life. LED lighting products on the market share expands unceasingly, also shows its great development prospects. LED has the advantage of can be compressed into a small volume, and generate point sources.

the smallest LED how small? Recently, Strasbourg, France material physical and chemical research institute, university of Paris sixth and researchers at the French atomic energy commission cooperative development first composed of a single molecule of LED, challenge the limit of LED to minimize the success.

the authority of the international physics journal physical review letters recently published the results of this research. French researchers will be the poly (thiophene thread at one end fixed on the probe scanning tunneling microscopy (STM), the other end in the gold surface. Poly (thiophene is composed of hydrogen, carbon and sulfur polymer molecules, are good conductors of electricity, used in the manufacture of LED lighting products. Experiments have shown that when a current flows through this nanowires, light is produced.

the study cleverly reveals the electrons and photons in the small scope of interaction. Scientists observed that poly (thiophene line light-emitting LED is a kind of principle is the same as the LED can light when a current through a semiconductor diode, a single wizard connectivity ( Only in the direction of a conductive) 。 Also, only the electronic scanning tunneling monitor probe into gold at one end surface, poly (thiophene line will glow. When the power polarity reversal, the light energy is negligible.

the experimental results show that when a negative charge ( Electronic) By poly (thiophene line with a positive charge ( Hole) Combination, and most of the energy transfer to the photon, appeared light phenomenon. Every 100000 electronic through poly (thiophene line, can emit a photon.

the generation of single molecule LED to researchers on the one hand provides a new tool of conductor glow, on the other hand also helps to optimize the luminescent material, in order to achieve better light effect. In addition, the research achievements of this breakthrough and molecular computer development laid a solid foundation for the future.

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