Question:
Which of the following dopants is used in germanium to form n-type semiconductor ?
Which of the following dopants is used in germanium to form n-type semiconductor ?
Show Hint
n-type needs a group 15 dopant with five valence electrons.
Updated On: Oct 1, 2026
- B
- In
- Ga
- P
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Germanium is in group 14 with four valence electrons. For an n-type semiconductor the dopant must give extra electrons, so it must be a group 15 element.
Step 2: Options:
B (boron), In (indium) and Ga (gallium) are group 13 elements with three valence electrons. They leave holes and give a p-type semiconductor.
P (phosphorus) is in group 15 with five valence electrons. Four form bonds with Ge and the fifth is free, giving n-type.
Final Answer:
The dopant is phosphorus, option (D). \[ \boxed{\text{P}} \]
Germanium is in group 14 with four valence electrons. For an n-type semiconductor the dopant must give extra electrons, so it must be a group 15 element.
Step 2: Options:
B (boron), In (indium) and Ga (gallium) are group 13 elements with three valence electrons. They leave holes and give a p-type semiconductor.
P (phosphorus) is in group 15 with five valence electrons. Four form bonds with Ge and the fifth is free, giving n-type.
Final Answer:
The dopant is phosphorus, option (D). \[ \boxed{\text{P}} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Properties of Solids Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions