Recently, a graduate student at Vanderbilt University in the United States accidentally discovered a mixed "paint" in an experiment. After being applied to an LED lamp, the original blue light would emit white light like an ordinary incandescent bulb. This invention uses an epoxy resin. The academic community predicts that this new discovery is likely to revolutionize the concept of illuminators beyond the bulb, and any object can be used as a light bulb. Michael Bowers is a graduate student at Vanderbilt University, and the invention of the hybrid "paint" comes from his accidental discovery in the experiment. In that experiment, Bowers originally wanted to make quantum dots of very small size, a few nanometers, less than a thousandth of a hair. Quantum dots are nanocrystals made of semiconductor materials. They can be called semiconductor nanocrystals, also known as "artificial atoms". They are composed of a small number of atoms and generally have a size below 100 nm. Ordinary quantum dots generally contain 100 to 1000 electrons, and these electrons are very active and the quantum dots are smaller. When the quantum dots are illuminated by light or they are powered up, the quantum dots will be active and emit bright light of various colors. But when Bowers used a laser to illuminate his quantum dots, unexpected things happened. "I couldn't help but be surprised when a bunch of white light shrouded the table," Bowers recalls. "These quantum dots should glow blue, but they now emit beautiful white light." After this unexpected discovery, Bauer Si and another student sprouted a new idea. Experts from the China Epoxy Resin Industry Association said that they mixed the quantum dots with a polyurethane/epoxy mixture and applied the mixture to a blue-emitting LED lamp. The bulb type "bloated" coated with a mixture of "paint". But what's important is that it really shines like Bowers wishes. This kind of white light is not the white light formed by the blue light of the LED, but the warm, yellowish white light emitted by the incandescent bulb. The principle of white light emitted by LEDs and incandescent lamps is not the same. The former emits color light through the injection type, and the color light must be converted by a certain kind of phosphor, and then mixed by light to form white light. The latter is a tungsten filament that heats up to emit white light. And compared to a 60-watt standard incandescent bulb, the "paint"-coated bulb is about 2 times brighter and the illumination time is about 50 times longer. The invention of quantum dot hybrid "paint" is believed by scientists to make the application of light-emitting diodes into a new era. Compared to 60-watt standard incandescent lamps, LEDs emit brighter light and longer illumination times, lasting 50,000 hours and not easily broken. In addition, the LED does not generate heat and is therefore more energy efficient. If all LEDs are used, the energy consumption for lighting in the United States will fall by 29% by 2025. Before the introduction of white light-emitting diodes in 1998, it only produced red, green, yellow, blue and other colored light, which limited the scope of use. At that time, LEDs were limited to use in traffic lights, flashlights, and architectural lighting. For general lighting, people need a white light source. The white-emitting light-emitting diodes invented in 1998 require a conversion to emit white light, which is not efficient. Therefore, this discovery may greatly expand the application range of LEDs. Even scientists have suggested that LEDs can eventually replace incandescent, fluorescent and sodium lamps. In fact, if this invention is commercially available, the light bulb will no longer be the only light source. Quantum dot blending "paint" can be applied to any specific thing. As long as the quantum dots are activated, light of various colors, including white light, can be emitted, and the era of bulb lighting may be over.
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