GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW) | ||||
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15:58 Nov 11, 2009 |
English to Serbian translations [PRO] Science - Physics Additional field(s): Electronics / Elect Eng | |||||||||||
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Selected response from: Milan Djukić Serbia Grading comment
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Summary of translations provided | ||||
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5 +2 | donor, donorska primesa |
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donor, donorska primesa Definition from ETF Beograd: Silicijum ima 4 valentna elektrona u najvišem energetskom opsegu. Ako se silicijumu doda mala količina primesa od materijala koji ima pet valentnih elektrona (fosfor, arsen ili drugi elementi 5. grupe), pojaviće se višak slobodnih elektrona koji znatno povećava provodnost silicijuma.Takve primese se nazivaju donorske primese jer daju elektrone, a tako dopirani silicijum se naziva n-tip silicijuma, jer ima više slobodnih nosilaca negativnog naelektrisanja (elektrona) nego šupljina. Tipična koncentracija primesa je mala i iznosi oko 1023 atoma m3 , ali je za 6 do 7 redova veličine veća od sopstvene koncentracije nosilaca. Example sentence(s):
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