2016
DOI: 10.1063/1.4960156
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The charge transport mechanism and electron trap nature in thermal oxide on silicon

Abstract: The charge transport mechanism of electron via traps in amorphous SiO 2 has been studied. Electron transport is limited by phonon-assisted tunneling between traps. Thermal and optical trap energies W t = 1.6 eV, W opt = 3.2 eV, respectively, were determined. Charge flowing leads to oxygen vacancies generation, and the leakage current increases due to the increase of charge trap density. Long-time annealing at high temperatures decreased the leakage current to initial values due to oxygen vacancies recombinatio… Show more

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Cited by 17 publications
(5 citation statements)
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“…It is reliably established that the oxygen vacancies in SiO 2 are the traps with energy 1.6 eV. [ 33 ] A trap with an energy of ≈1.2 eV in SiO 2 is most likely an oxygen divacancy, as it follows from the analysis of oxygen vacancy–related defect center annealing kinetics and thermally stimulated current. [ 34,35 ] Thus, we can assume that the trap energy value 1.2 eV in the studied SiCOH low dielectric is due to SiSiSi oxygen divacancies.…”
Section: Resultsmentioning
confidence: 99%
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“…It is reliably established that the oxygen vacancies in SiO 2 are the traps with energy 1.6 eV. [ 33 ] A trap with an energy of ≈1.2 eV in SiO 2 is most likely an oxygen divacancy, as it follows from the analysis of oxygen vacancy–related defect center annealing kinetics and thermally stimulated current. [ 34,35 ] Thus, we can assume that the trap energy value 1.2 eV in the studied SiCOH low dielectric is due to SiSiSi oxygen divacancies.…”
Section: Resultsmentioning
confidence: 99%
“…This value is close to the thermal ionization energy 1.6 eV of the oxygen vacancy in SiO 2 . [ 33 ] It is interesting to note that if we take the luminescence with the energy of 3.6 eV for a given PLE peak, we also get (6.1 − 3.6)/2 = 1.25 eV for the W t estimation.…”
Section: Resultsmentioning
confidence: 99%
“…В данной работе мы попытались воспроизвести электронную структуру и оптические свойства SiO x с помощью первопринципного моделирования простой модельной структуры SiO x , представляющей собой некий промежуточный вариант между RM-и RB-моделями. Расчетное значение E g = 8.0 eV для SiO 2 согласуется с известными из литературы данными [20,21], тогда как для чистого кремния расчет переоценивает E g , что можно объяснить использованием в расчетах точной структуры α-SiO 2 и модельной для Si.…”
Section: результаты и обсуждениеunclassified
“…5, b). Расчетное значение E g = 8.0 eV для SiO 2 согласуется с известными из литературы данными [25,30] [31]. Для этой модели локальные электрические поля способствуют пространственному разделению рождаемых электронно-дырочных пар.…”
Section: результаты и обсуждениеunclassified