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Volume 6,Issue 4,July - Aug.,2019


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Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


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Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


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Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Successfully Published

Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


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Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Successfully Published

Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Successfully Published

Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Successfully Published

Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org


Successfully Published

Volume 6,Issue 4,July - Aug.,2019


Submissions open

"Submissions Open For Volume 6,Issue 5,Sept.- Oct., 2019"


Mail your paper at E-mail:

Mail your paper at E-mail: submit2ijasm@yahoo.in , submit@ijasm.org



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Photoluminescence from Silicon Nanostructures

  • Hailemariam, Solomon
  • Melese, Getnet
  • Badassa, Tesgera
Bulk silicon (Si) and germanium (Ge) have an indirect band gap transitions however when they are miniaturized to Nanometer scale, the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) increases, and hence the transition changes to direct due to confinement. The HOMO-LUMO gap determines the excitation of electrons so that the Nano structures will emit light. When the size of quantum dot decreases the surface area to volume ratio increases and localized surface states appears in the forbidden region. Exciton energy states are also exists in the same gap region. We have explicitly integrated these effects in a phenomenological model to obtain an analytical expression for the photoluminescence spectra. We presented also the parameters that tune the photoluminescence intensity of Si nanostructure. Finally we developed a model that could explain experimental results of Si Nano crystal photoluminescence versus size and wavelength by using mat lab programming
Select Volume / Issue:
Year:
2015
Type of Publication:
Article
Keywords:
Photoluminescence; Nanostructures; Quantum Confinement; Recombination
Journal:
IJASM
Volume:
2
Number:
2
Pages:
39-44
Month:
Mar.-Apr.
ISSN:
2394-2894
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