Semiconductor Questions: Carrier Lifetimes and Temperature Effects

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SUMMARY

Carrier lifetimes can indeed indicate whether a semiconductor material is n-type or p-type, as they are influenced by the type of charge carriers present. Increasing the sample temperature generally decreases carrier lifetimes due to enhanced scattering processes. The discussion highlights the importance of understanding relaxation time approximation for electronic transport, as detailed in Seegers' book on Semiconductors. This resource is recommended for a comprehensive understanding of the topic.

PREREQUISITES
  • Understanding of semiconductor physics
  • Familiarity with carrier lifetimes and their measurement
  • Knowledge of n-type and p-type semiconductor characteristics
  • Basic concepts of temperature effects on material properties
NEXT STEPS
  • Read Seegers' book on Semiconductors for insights on relaxation time approximation
  • Research the relationship between temperature and carrier mobility in semiconductors
  • Explore methods for measuring carrier lifetimes in various semiconductor materials
  • Investigate the effects of doping on carrier lifetimes in n-type and p-type semiconductors
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Students and professionals in semiconductor physics, materials scientists, and engineers working with electronic devices who seek to deepen their understanding of carrier dynamics and temperature effects in semiconductors.

poder17
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hi guys,

i have two semiconductor questions that have been troubling me.

1. can measured carrier lifetimes be used to determine if the material is n-type or p-type?

2. what would be the effect on the lifetime of increasing the sample temperature?

i have been getting mixed information on both questions and was wondering if someone could clear it up for me.

thankyou
 
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Look at Seegers book on Semiconductors, it has the best writeup on relaxation time approximation for electronic transport in semiconductors without getting into the nuances of the advanced formulation. I'll be happy to work with you on this further if youare still confused.
 
thanks for the tip on the book, unfortunately it was sunday today and the library at my university was closed, i'll have to look it up tomorrow.
 
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