Physics in p-n junction Drift electric field E p-type ⊕ n-type 01 semiconductor semiconductor ⊕ Spacechargeregion 04 Diffusion The motion of carriers?The potential?The current?
Physics in p-n junction p-type semiconductor － － － － － － － － － － － － － － － － － － － － － － － － + + + + + + + + + + + + + + + + + + + + + + + + Diffusion electric field E Space charge region n-type semiconductor The motion of carriers? The potential? The current?.............. Drift
Physics in p-n junction p-type Space I n-type semiconductor I charge I semiconductor 1 regionI 1 The potential difference o between the ends of the space charge region of the balanced pn junction is called the contact potential difference(CPD)or the built-in potential difference.The corresponding difference in electron potential energy qVp is called the barrier of the pn junction
Physics in p-n junction Space charge region V VD － － － － － － － － － － － － － － － － － － － － － － － － + + + + + + + + + + + + + + + + + + + + + + + + The potential difference between the ends of the space charge region of the balanced pn junction is called the contact potential difference (CPD) or the built-in potential difference. The corresponding difference in electron potential energy qVD is called the barrier of the pn junction p-type semiconductor n-type semiconductor VD