Energy bands of a semiconductor at 0 K0 K पर अर्धचालक के ऊर्जा बैंडEnergy bands of a semiconductor at 0 K
NCERT Fig 14.1 · Class 12 Physics · Chapter 14 · interactive diagram
Read Chapter 14 with this diagramइस डायग्राम के साथ अध्याय 14 पढ़ेंIs diagram ke saath Ch 14 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- Conduction band (चालन बैंड) — The higher band of 4N closely spaced states. Completely empty at 0 K; electrons that reach it can move freely and conduct.
- Valence band (संयोजकता बैंड) — The lower band of 4N states holding the 4N valence electrons of N atoms (Si or Ge have 4 valence electrons each). Completely filled at 0 K.
- EC — bottom of conduction band (EC — चालन बैंड का तल) — The lowest energy level in the conduction band.
- EV — top of valence band (EV — संयोजकता बैंड का शीर्ष) — The highest energy level in the valence band.
- Energy band gap Eg (ऊर्जा बैंड अंतराल Eg) — Eg = EC − EV. For C (diamond) 5.4 eV, Si 1.1 eV, Ge 0.7 eV.
- Forbidden gap (वर्जित अंतराल) — No allowed electron states lie between EV and EC in a pure crystal.
- Energy axis (ऊर्जा अक्ष) — Electron energy increases upward.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.1. Report a mistake