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I have read the article about plastic semiconductors. When I was choosing the theme that I would write about I was decided it had to be something from science, especially from physics. I am interested in physics so I started to search on the internet and found the article that isn’t so fresh but I was captured by it. On the other hand the article isn’t as shock as it seems. Nowadays in the science there are many fascinating researches so why not plastic semiconductors? There are many developed technologies in chemistry, molecular physics or solid state physics and they are extremely studied. Especially in the world these researches are financed a lot.
What is the problem? The problem is that common plastics aren’t conductive. They belong to nonconductors. Solid state conductors are metals but also semiconductors can be conductive under some conditions. Changing external or internal conditions can easily modify the conduction of the semiconductor. The change of the external condition can be caused by some kind of energy, for example by light or by thermal energy. The change of the internal condition is caused by adding impurities of other elements. To summarize the main advantage of semiconductors before metals is the possibility to change easily their conductive condition. That’s why the semiconductors are used in microchips.
The most useful element in electronics especially in microchips is silicon that everything is known about. It is the second plentiful element on the Earth after oxygen. This is its advantage but its bonds aren’t so strong. Perhaps that’s why a life on the earth is made by carbon and not by silicon.
The technologist Paulette Princ from the Netherlands changed the structure of plastics and received features like in silicon. She made a semiconductor from a plastic. The way to the plastic semiconductors wasn’t easy. The discovery of a polymer was important to start thinking about plastic semiconductors. Polymer has a crystalline structure that is fundamental for rising velocity of carriers but the common semiconductors have a better conductivity. The better mobility of carriers was reached by extending of a distance between carbons in the polymer.
We can find various advantages of plastic semiconductors in comparison with silicon semiconductors. A lot of common electronic devices use semiconductors from silicon. We know that silicon is a little bit brittle. Silicon is in mobile phones and notebooks that are portable and so there is a strong probability that they drop down and can be destroyed. We can say that plastic semiconductors aren’t sensitive to dropping down and so they have better features than silicon. If we were ecologists we would be scared because in the world there are huge amount of things from plastics and it isn’t beneficial for nature. I think that plastic semiconductors find a place on the market of goods because they will be much cheaper than silicon semiconductors. Accountants of large companies assess that plastic chips decrease prices of electronic circuits of 90 per cent.
We can summarize that the branch of semiconductors is studied intensively in science but branch of computers (exactly processors) solve big problem. The frequency of processors doesn’t increase as fast as in past. It is simple to understand: a transmission of information is fast when the information travels a small distance. If we want to have fast frequency of a processor in computers a distance of transistors in the processor has to be very small but we can’t decrease the distance infinitely. We find some problems by decreasing the distance, for example the devices get warm enormously. Silicon semiconductors have to be replaced by something else. I think that plastic semiconductors don’t solve it because they have same problem. I believe that nanotechnologies or spintronics can find a right way to solve the problem. We will see in future.