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Luminescence blinki...
Luminescence blinking of a Si quantum dot in a SiO2 shell
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- Sychugov, Ilya (author)
- KTH,Mikroelektronik och tillämpad fysik, MAP
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- Juhász, Róbert (author)
- KTH,Mikroelektronik och Informationsteknik, IMIT
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- Linnros, Jan (author)
- KTH,Mikroelektronik och Informationsteknik, IMIT
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Valenta, Jan (author)
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(creator_code:org_t)
- The American Physical Society, 2005
- 2005
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - : The American Physical Society. - 1098-0121 .- 1550-235X. ; 71:11, s. 115331-1-115331-5
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The phenomenon of on-off luminescence intermittency - blinking - in silicon nanocrystals was studied using a single-dot microphotoluminescence technique. From recordings of the luminescence intensity trace, on- and off-time distributions were extracted revealing exponential behavior, as expected for systems with blinking of a purely random nature. The corresponding switching rates for on-off and off-on processes exhibit different dependence on the excitation intensity. While the on-off switching rate grows quadratically with the excitation, the inverse process is nearly pumping power independent. Experimental findings are interpreted in terms of a dot "charging" model, where a carrier may become trapped in the surrounding matrix due to thermal and Auger-assisted processes. Observed blinking kinetics appear to be different from that of porous silicon particles.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- silicon
- silicon dioxide
- analytic method
- article
- comparative study
- crystal structure
- kinetics
- luminescence
- mathematical model
- photoluminescence
- quantum dot
- recording
- Condensed matter physics
- Kondenserade materiens fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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