Why isn't the depletion layer width equal in the p and n

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SUMMARY

The depletion layer width in a P-N junction is not equal on both sides due to differing doping levels. In photovoltaic applications, the side with lower doping concentration exhibits a wider depletion width. This phenomenon occurs because both sides must maintain equal charge, leading to variations in the depletion region's dimensions. Understanding this concept is crucial for optimizing photovoltaic device performance.

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  • P-N junction theory
  • Doping concentration in semiconductors
  • Charge neutrality in semiconductor physics
  • Basic principles of photovoltaics
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shaylen124
Hello, I've been researching photovoltaics and I've seen some articles which state that the width of the depletion layer is not equal on both sides on the pn junction. i don't understand why this occurs I've tried to research why and how this happens but have been unable to find an answer.
 
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Because the doping level is different on the two sides of the P-N junction. The two sides will have equal charge, so the side with a lower doping will have a wider depletion width.
 
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