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Which of the following is used as the recombination agent by semiconductor device manufactures?

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Which of the following is used as the recombination agent by semiconductor device manufactures?

(a) Silver

(b) Gold

(c) Platinum

(d) Aluminium

The question was posed to me in semester exam.

I want to ask this question from Carrier Life time topic in chapter Conduction in Semiconductors of Electronic Devices & Circuits

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Correct answer is (b) Gold

For explanation I would say: Gold is used as a recombination agent because of its chemical properties as it was used in the Bohr’s experiment. Thus the device designer can obtain the desired carrier lifetimes by introducing gold into silicon under controlled conditions.

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