MIPT Research Finds: Semiconductor Isomorphism Can Improve LED Design

By Diodes Incorporated

According to foreign media reports, researchers from the Moscow Institute of Physics and Technology (MIPT) found that superinjection (previously thought to be only possible in semiconductor heterostructures) may also occur in homogeneous structures (consisting of a single semiconductor material). structure).

They point out that most known semiconductors can be used to construct homogenous structures capable of superinjection, a finding that provides a new approach to light source development and production. Researchers say that diamonds and many emerging wide bandgap semiconductor materials have excellent optical and magnetic properties.

However, these materials cannot be effectively doped like silicon or gallium arsenide, which limits their practical application. The MIPT team predicted the superinjection effect in diamond p-i-n diodes, which they found to allow injection of more orders of magnitude of electrons into the i-region of the diode than doping of the n-type implant layer.

The team believes that the concentration of electrons produced by superinjection in diamond diodes may be 10,000 times higher than previously thought. Therefore, the researchers said that diamond may be the basis of UV LEDs, which is several thousand times brighter than the current theoretical calculations.

Researcher Igor Khramtsov said: "What is surprising is that compared to most mass market semiconductor LEDs and heterostructure-based lasers, the superinjection effect in diamonds is 50 to 100 times stronger." Researcher Dmitry Fedyanin pointed out: "For silicon Ultra-injection of bismuth and bismuth requires low temperature and may have an effect on its effectiveness. However, in diamond or gallium nitride, strong superinjection can be performed even at room temperature.” They pointed out that superinjection can be used in various semiconductor materials. In progress, including traditional wide bandgap semiconductors and new 2D materials.

This opens up new avenues for the design of high-efficiency blue, violet, ultraviolet and white LEDs, as well as optical wireless communication (Li-Fi) sources, new lasers, quantum Internet transmitters and optical devices for early disease diagnosis. Their research results are published in the semiconductor science journal "SemiconductorScienceandTechnology".

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