[서울시립대 반도체소자] 2단원 노트정리 - Motion and Recombination of e's and h's

소개글

ㄱㅇ교수님이 과제로 줄곧 내주곤 하시는 노트정리입니다!
손글씨로 내야 하지만 제가 악필이어서... 워드 파일로 변환했습니다.
약자를 많이 사용했습니다!
예시: definition -> def. , condition -> cond. , purpose -> purp. , proof -> pf. , confer -> cf. , electron -> e,
어떤 내용이든 정의, 조건, 목적 등의 항목들을 기준으로 정리하고자 노력했습니다.

목차

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본문내용

2-1. (1) Motion
○thermal motion
*purp.) max speed of e in SCD
*analogy: movement of bouncy balls in a vibrating box
○drift
*analogy: movement of bouncy balls in a slanted vibrating box
*pf.) drift momentum = force * m.f.t.(mean free time)

○carrier scattering
△phonon (acoustic)
\mu_{phonon} increase ← phonon density increase ← T increase ☆
△ionized impurity
\mu_{impurity} increase ← impurity scattering increase ← T increase
△total scattering: Matthiessen's rule
*pf.) rate unit = collision/time, mobility unit = m.f.t. unit = time /collision. Thus, inverse.
△total scattering & T
Velocity saturation ← optical phonon generation consumes most of E ← high KE e
*cf.) if SCD smaller than m.f.p.?
→no saturation, ballistic transport

2-2. other current mechanisms
○Thermionic emission
*def.) current goes OVER E barrier between 2 different SCDs
proportional to T^2

○Tunneling
*def.) current goes THROUGH E barrier between 2 different SCDs

참고 자료

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