Intrinsic semiconductor at T = 0 K and T > 0 KT = 0 K और T > 0 K पर नैज अर्धचालकIntrinsic semiconductor at T = 0 K and T > 0 K
NCERT Fig 14.6 · 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
- (a) At T = 0 K ((a) T = 0 K पर) — No electron can reach the conduction band: the intrinsic semiconductor behaves like an insulator.
- Valence band full (0 K) (संयोजकता बैंड भरा (0 K)) — Every state is occupied.
- Energy gap Eg (ऊर्जा अंतराल Eg) — Si 1.1 eV, Ge 0.7 eV.
- (b) At T > 0 K ((b) T > 0 K पर) — Thermal energy lifts a few electrons across the gap. The picture shows four electron–hole pairs.
- Electrons in the conduction band (चालन बैंड में इलेक्ट्रॉन) — They partially occupy the conduction band and conduct.
- Holes left in the valence band (संयोजकता बैंड में होल) — Equal in number to the electrons that went up: ne = nh = ni (intrinsic carrier concentration).
- Thermal excitation (ऊष्मीय उत्तेजन) — At the same time electrons and holes recombine; in equilibrium generation rate = recombination rate.
- Energy gap Eg (ऊर्जा अंतराल Eg) — Si 1.1 eV, Ge 0.7 eV.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.6. Report a mistake