Electron–hole pair and motion of a holeइलेक्ट्रॉन–होल युग्म और होल की गतिElectron–hole pair and motion of a hole

NCERT Fig 14.5 · Class 12 Physics · Chapter 14 · interactive diagram

Parts and what they mean

• (a) Hole at site 1 ((a) स्थल 1 पर होल) — Thermal energy breaks a bond. The vacancy left behind has an effective charge +q and is called a hole.
• Free (conduction) electron, charge −q (मुक्त (चालन) इलेक्ट्रॉन, आवेश −q) — It moves independently through the crystal and gives the electron current Ie in an electric field.
• (b) Bound electron jumps from site 2 to site 1 ((b) बँधा इलेक्ट्रॉन स्थल 2 से स्थल 1 पर कूदता है) — An electron from a neighbouring covalent bond fills the vacancy. The free electron of (a) takes no part in this.
• Hole now at site 2 (अब होल स्थल 2 पर) — So the hole has apparently moved from 1 to 2. In a field holes drift towards the negative potential, giving the hole current Ih; total I = Ie + Ih.
• Covalent bond (सहसंयोजक आबंध) — Two shared electrons.
• +4 core (+4 क्रोड) — Si or Ge inner core.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.5. Report a mistake