In a semiconductor, the number density of intrinsic charge carriers at 27°C is 1.5 × 10¹? / m³. If the semiconductor is doped with impurity atom, the hole density increases to 4.5×10²² / m³. The electron density in the doped semiconductor is __________ x 10? / m³.
In a semiconductor, the number density of intrinsic charge carriers at 27°C is 1.5 × 10¹? / m³. If the semiconductor is doped with impurity atom, the hole density increases to 4.5×10²² / m³. The electron density in the doped semiconductor is __________ x 10? / m³.
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1 Answer
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ni² = ne × nh
(1.5×10¹? )² = ne × (4.5×10²²)
ne = (2.25 × 10³²)/ (4.5 × 10²²) = 0.5 × 10¹? = 5 × 10? / m³
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