[A+]광운대_물리전자2_요약과제_TH05(Chapter 5)

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"[A+]광운대_물리전자2_요약과제_TH05(Chapter 5)"에 대한 내용입니다.

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1. Explain Figure 5-20 The Zener effect.
Definition: The Zener effect is a quantum mechanical tunneling phenomenon that occurs in a ①heavily doped P-N junction diode under ②strong reverse bias. Electrons tunnel through the energy barrier and move to the opposite side, resulting in a flow of current.[1]

Conditions for Occurrence
(1) Very high doping concentration:
The energy bands bend sharply, and the Fermi level is abnormally positioned, causing the depletion region to become extremely narrow.
(2) Application of a sufficiently large reverse bias voltage:
A strong electric field is formed, enabling electrons to tunnel through the energy barrier.
→ When these conditions are met, electrons tunnel through the barrier and move to the opposite side, allowing reverse current to flow. This Zener effect can occur even at relatively low breakdown voltages.

2. Explain Figure 5-21 Electron-hole pairs created by impact ionization.
High-energy electrons passing through a strong electric field region collide with bound electrons, promoting them to the conduction band. This process generates new EHPs.[2] If the newly generated electrons possess sufficient energy, they can trigger additional ionization events, leading to a chain reaction known as impact ionization.

참고자료

· Song 전자공학. (2023.02.04). PN 접합 – 항복/제너, 애벌런치. Song 전자공학. PN 접합(PN junction) - 항복(Break down) / 제너, 애벌런치(Zener, Avalanche) : 네이버 블로그
· 5.1 Basics of Impact-Ionization
· lol. (2021.05.23). PN junction breakdown (Zener/Avalanche). Lol. https://blog.naver.com/lolengdemian/222362703142
· 핵심만. (2022.08.05). [물리전자공학1] 24. PN Junction에서의 Capacitance, Depletion CAP, Diffusion CAP. 헛소리 없는 재테크 공략 https://m.blog.naver.com/reverse_vibration/222840565823
· Electronics Lessons. “Why is Silicon Preferred over Germanium?”
· Why is Silicon Preferred over Germanium?
· 물만두. (2023.05.17). [반도체] Short Channel Effect, SCE - (2) Punch through(펀치스루). https://blog.naver.com/yurixxi/223104335554
· p–n junction - Wikipedia
· 3.4 Schottky diode current
· mseysi. (2023.06.03). [7강] Metal-Semiconductor Contact_schottky barrier, rectifying/ohmic contact. 공부하는 공대생. https://blog.naver.com/mseysi/223119190209