Does the doped phosphorus on silicon semiconductor is donor or acceptor and find the semiconductor type.

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Chapter 40, Problem 20Q

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Does the doped phosphorus on silicon semiconductor is donor or acceptor and find the semiconductor type.

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The plot of the E field with respect to x in a metal semiconductor junction at 300K is shown in the figure. The semiconductor is Si and E(0)=-2x10* V/cm and xo-0.2x10 cm. What is the semiconductor type and built in potential value. レEo) O a. n type 200 mV O b. n type 800 mv Oc p type 400 mV Od. p type 200 mV O e. n type 400 mV Of. p type 800 mv

What is the essential characteristic for an element to serve as a donor impurity in a semiconductor such as Si or Ge? For it to serve as an acceptor impurity? Explain.

exist is for valence electrons to "leap" into the conduction band with the Enoiteou Question 5 pplication of sufficient energy, legving a hole, or vacancy, behind in the valence band: Valence electron leaping into conduction band Conduction band valence band With sufficient thermal energy, these electron-hole pairs will form spontaneously. Af room temperature, however, this activity is slight. we may greatly enhance charge carrier formation by adding specific impurities to the semiconducting material. The energy states of atoms having different electron configurations do not precisely "blend" with the electron bands of the parent semiconductor crystal, causing additional energy levels to form. Some types of impurities will cause extra donor electrons to lurk just beneath the main conduction band of the crystal. These types of impurities are called pentavalent, because they have 5 valence electrons per atom rather than 4 as the parent substance typically possesses: Doped with a…