Unbiased p-n junction and barrier potentialबिना बायस p-n संधि और विभव प्राचीरUnbiased p-n junction and barrier potential
NCERT Fig 14.11 · 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) Diode in equilibrium (V = 0) ((a) साम्य में डायोड (V = 0)) — p-region: it has gained electrons, so it is negative relative to the n-region.
- n-region (n-क्षेत्र) — It has lost electrons, so it is positive relative to the p-region.
- Depletion region (अवक्षय क्षेत्र) — The potential changes only across this region.
- Fixed ions (स्थिर आयन) — − acceptor ions on the p-side, + donor ions on the n-side.
- (b) Potential V across the junction ((b) संधि के आर-पार विभव V) — Rises from the p-side to the n-side across the depletion region.
- Barrier potential V0 (विभव प्राचीर V0) — Its polarity opposes further flow of electrons from n to p (and holes from p to n), so equilibrium is kept. Typically about 0.7 V for Si and 0.3 V for Ge (not given in NCERT; for intuition).
- Axes (अक्ष) — Potential V against position x.
- Holes (होल) — Majority carriers on the p-side.
- Electrons (इलेक्ट्रॉन) — Majority carriers on the n-side.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 14.11. Report a mistake