October 29, 2013 at 17:29The future of lighting is an organic light bulb
Physicist Dmitry Parashchuk talks about an urgent problem for chemists and physicists - how to create such a material that will simultaneously have semiconductor properties, will be flexible, will emit light and will live long, in a word, how to invent an effective light source based on organics.
Why is this necessary, well, firstly, all modern light sources are ineffective: now about 20-30% of world electricity production is used for lighting, which means that of these 20-30% we effectively use only a few percent, well, and -second, such a source would allow the use of light much more varied. Because researchers want it to be not a unit of light, but a film that could be used in any room and for various needs.
What this device should look like - a classic example - is a light-emitting diode. There is a film with two electrodes, one injects into this film one type of charge carrier, for example, an electron, and the second electrode - holes. These charge carriers meet, recombine, and as a result a quantum of light is emitted. So electrical energy is converted into the energy of light. This is a classic type of device, which is made on a semiconductor diode, but recently there are new approaches that allow you to make a light-emitting transistor. That is, a transistor is a device with three electrodes, which allows using one control electrode to control the current that passes through the transistor. It turns out that you can make a transistor that controls the current and emits at the same time.
Such transistors will make it possible to make the first organic laser with electric pumping, that is, a thin film that would emit laser radiation and be powered by a battery, for example. Dmitry Parashchuk, Doctor of Physics and Mathematics, Associate Professor of the Laboratory of Photophysics of Organic Nanomaterials of the International Educational and Scientific Laser Center of Moscow State University, tells more about future light sources. M.V. Lomonosov.
You can look at other materials of the author on PostNauke - postnauka.ru/author/paraschuk
Why is this necessary, well, firstly, all modern light sources are ineffective: now about 20-30% of world electricity production is used for lighting, which means that of these 20-30% we effectively use only a few percent, well, and -second, such a source would allow the use of light much more varied. Because researchers want it to be not a unit of light, but a film that could be used in any room and for various needs.
What this device should look like - a classic example - is a light-emitting diode. There is a film with two electrodes, one injects into this film one type of charge carrier, for example, an electron, and the second electrode - holes. These charge carriers meet, recombine, and as a result a quantum of light is emitted. So electrical energy is converted into the energy of light. This is a classic type of device, which is made on a semiconductor diode, but recently there are new approaches that allow you to make a light-emitting transistor. That is, a transistor is a device with three electrodes, which allows using one control electrode to control the current that passes through the transistor. It turns out that you can make a transistor that controls the current and emits at the same time.
Such transistors will make it possible to make the first organic laser with electric pumping, that is, a thin film that would emit laser radiation and be powered by a battery, for example. Dmitry Parashchuk, Doctor of Physics and Mathematics, Associate Professor of the Laboratory of Photophysics of Organic Nanomaterials of the International Educational and Scientific Laser Center of Moscow State University, tells more about future light sources. M.V. Lomonosov.
You can look at other materials of the author on PostNauke - postnauka.ru/author/paraschuk