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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Diamond-based semiconductors are currently of enormous interest in the research community. Although diamond itself is an insulator, the addition of a dopant will narrow the band gap. One semiconductor system has diamond with boron as a dopant. Is this a p- or an n-type semiconductor?

Interpretation Introduction

Interpretation:

Diamond with boron as dopant is a p-type or n-type semiconductor has to be identified.

Concept introduction:

P-type semiconductor:

When the trivalent impurity is added to an intrinsic or pure semiconductor (silicon or germanium) is called as p-type semiconductor. Boron (B), Gallium (G), Indium (In), Aluminium (Al) etc. are trivalent impurities and which are called acceptor impurity.

N-type semiconductor:

When pentavalent impurity is added to an intrinsic or pure semiconductor (silicon or germanium) is called as n-type semiconductor. Phosphorus, arsenic, antimony etc are pentavalent impurities which are called donor impurity.

Explanation

Silicon or germanium is used as the intrinsic semiconductor, silicon and germanium has four valence electrons. Carbon also has four valence electron.

diamond doped with boron is P-type semiconductor, because, when trivalent impurity is added to diamond is called as p-type semiconductor. Boron (B), Gallium (G), Indium (In), Aluminium (Al) etc is trivalent impurities which are called acceptor impurity...

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