Size-dependent photocurrent of photodetectors with silicon nanocrystals

Sang Kyun Kim, Baek Hyun Kim, Chang Hee Cho, Seong Ju Park

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We report on the effect of nanocrystal size on the photocurrent of silicon nanocrystal (Si NC) photodetectors. The photocurrent onset energy was increased with decreasing the size of Si NCs, which agreed with the blueshift in the absorption onset. The increase in the quantum efficiency with increasing the size of Si NCs was much larger than the increase in the absorbance with increasing the size of Si NCs. This was attributed to the differences in charge separation for Si NC of different sizes, which was influenced by the recombination rate and binding energy of photogenerated excitons in Si NCs.

Original languageEnglish
Article number183106
JournalApplied Physics Letters
Volume94
Issue number18
DOIs
Publication statusPublished - 2009 May 18
Externally publishedYes

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photocurrents
photometers
nanocrystals
silicon
polarization (charge separation)
quantum efficiency
binding energy
excitons
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Size-dependent photocurrent of photodetectors with silicon nanocrystals. / Kim, Sang Kyun; Kim, Baek Hyun; Cho, Chang Hee; Park, Seong Ju.

In: Applied Physics Letters, Vol. 94, No. 18, 183106, 18.05.2009.

Research output: Contribution to journalArticle

Kim, Sang Kyun ; Kim, Baek Hyun ; Cho, Chang Hee ; Park, Seong Ju. / Size-dependent photocurrent of photodetectors with silicon nanocrystals. In: Applied Physics Letters. 2009 ; Vol. 94, No. 18.
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