Shristy posted an Question
August 12, 2020 • 05:23 am 30 points
  • IIT JAM
  • Chemistry (CY)

(d) none ol uie duove staucnid uuu consider a n-type semiconductor whose e, = 0, e = 2.0 ev and ea = 1.98 ev. the correct statement among the following is: (a)

(d) None Ol uie dUOVe staucnID uUu Consider a n-type semiconductor whose E, = 0, E = 2.0 eV and Ea = 1.98 eV. The correct statement among the following is:

2 Answer(s) Answer Now
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  • Suman Kumar

    This can be explained very simply by considering that at higher temperature, the semiconductor will produce more electron hole pairs and the band gap will decrease,

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    Due to this production of extra electron hole pairs the fermi level moves down towards the valance band.

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    little math is there

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    https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.quora.com/What-is-the-effect-of-temperature-on-the-Fermi-level-of-N-type-and-P-type-semiconductors&ved=2ahUKEwi2g-H_xZTrAhWuzjgGHZyvBlAQFjAKegQICxAB&usg=AOvVaw0qoc7C9QRfaxeASK2qBkSJ&cshid=1597198864851

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    See this

  • Suman Kumar best-answer

    option D is correct Shristy

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    explanation mam?

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    yes mam

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    https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.quora.com/What-is-the-effect-of-temperature-on-the-Fermi-level-of-N-type-and-P-type-semiconductors&ved=2ahUKEwi2g-H_xZTrAhWuzjgGHZyvBlAQFjAKegQICxAB&usg=AOvVaw0qoc7C9QRfaxeASK2qBkSJ&cshid=1597198864851. Explanation

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    Priyanshu kumar Best Answer

    check this👇

    cropped6297691848697647858.jpg
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    but sir option d is given correct

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    But for n type semiconductor the fermi level increases towards CB with increases in temperature

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    https://www.quora.com/What-is-the-effect-of-temperature-on-Fermi-level/answer/Keerthi-Priya-154?ch=10&share=a80eaab2&srid=XRpEY

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    check this shristy

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    https://youtu.be/1td--HDNyMk see this video also...Different different explanation but in this video explanation is good

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    Sorry,then option D is correct...Thanks for correcting me🙏

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    Main concept behind all these shifting is that where the probability of electron density is more,the fermi level shifts towards there...By mathematically you can also find the population at different bands using boltzmann distribution

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