Seniconductor physics

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Semiconductor Physics

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Abstract

Semiconductors are materials that exhibit electric conductivity Because of their properties and because of the highly adaptive nature of these materials , semiconductors have numerous and highly important applications in today 's society . This aims to give a clearer understanding of what semiconductors are as well as to enumerate some of the global challenges posed to semiconductors in the fields of science technology , engineering , and even the medical aspect of the semiconductor industry . A review of the current literature available regarding

semiconductors and an analysis of the different developments in the field of semiconductors provides insights into the challenges in the development of semiconductors . It is clear that semiconductor progress is hindered by problems such as defects , medical issues in the industry , and increasing demands of sensitivity and selectivity

Semiconductor Physics

Semiconductors are solid materials that have an electrical conductivity that varies over a wide range between that of conductors and that of insulators . This is clearly stated by the name itself used to describe such material , which is composed of two words-semi and conductor . Semi means partially while conductor refers to something that can conduct electricity . External means can also be utilized to change the electrical charge carrier density of semiconductors . The electrical conductivity of these materials is a result of the charges of both signs (Semiconductor , 1552 ) The following aims to provide better understanding of semiconductors . A specific objective of the following is to be able to show the global challenges encountered in the semiconductor industry

Semiconductors have many uses in technology as these materials become essential in this day and age in almost all modern electrical devices Combining different types of semiconductors creates devices that have special electrical properties - properties that permit the control of electrical signals . Some devices used today that employ the use of semiconductors are computers , radios , cellular phones and digital audio players . Semiconductors are also used in the creation of various devices used in the medical field

There are two main classifications of semiconductors : intrinsic and extrinsic . The type that is chemically very pure and is a poor conductor falls under the intrinsic semiconductor material classification . These intrinsic semiconductors possess equal numbers of negative carriers and positive carriers . While the extrinsic semiconductor is an upgraded version of intrinsic semiconductors as it has added varied quantities of impurities , a process known as doping . This process improves semiconductor conductivity by changing its electrical properties . The addition of impurities controls the conductivity

The electrical conductivity of a semiconductor is modified by many s of magnitude through doping with foreign atoms . For example electron conduction is improved when a phosphorus atom - housing five valence electrons - becomes an electron donor to the conduction band when utilized as a replacement of a silicon host atom housing four valence electrons (Queisser Haller , 945 ) The fact that conductivity can be altered with the addition of impurities makes semiconductors highly important in the field of engineering . The fact that semiconductors can be...