Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

我想瘦 asked in 科學其他:科學 · 1 decade ago

有關蕭特基效應

麻煩哪位好心人士可以解釋一下蕭特基效應(Schottky Effect)

能越詳細越好

1 Answer

Rating
  • ?
    Lv 5
    1 decade ago
    Favorite Answer

    「蕭特基效應(Schottky Effect)」:由於外加電場使受熱物質表面發射電子所需的能量降低,因而從表面逸出的電子增多的現象。從某一特定物質表面逸出一個電子所需的最低能量(功函數)是由熱能提供的。加上很弱的外電場可能只會把已經從物質表面發射出的電子吸走。外場增到一定值,功函數值就降低;外場繼續增大,功函數也隨著繼續降低,於是電子發射流繼續增大。但是,若外場到達甚高值,電子發射要逾量增大,因為這時又開始發生另一不同類型的發射,稱為場致發射。

Still have questions? Get your answers by asking now.