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Size-selected compound semiconductor quantum dots by nanoparticle conversion

Wacaser, Brent LU ; Dick Thelander, Kimberly LU ; Zanolli, Zeila LU ; Gustafsson, Anders LU ; Deppert, Knut LU and Samuelson, Lars LU (2007) In Nanotechnology 18.
Abstract
We have developed a novel technology, called nanoparticle conversion, for producing compound semiconductor quantum dots (QDs) in which the dot size, surface density, position, and the materials system are all independently controlled. Nanoparticle conversion also lends itself to spatially controlled positioning of QDs. To demonstrate this technology we report the formation of InP QDs using nanoparticle conversion. We have produced QDs on substrates of different types by converting randomly and lithographically positioned nanoparticles into compound semiconductors in a chemical vapour deposition system. Electron microscopy and atomic force microscopy measurements reveal that the morphology of these QDs is similar to that of QDs produced by... (More)
We have developed a novel technology, called nanoparticle conversion, for producing compound semiconductor quantum dots (QDs) in which the dot size, surface density, position, and the materials system are all independently controlled. Nanoparticle conversion also lends itself to spatially controlled positioning of QDs. To demonstrate this technology we report the formation of InP QDs using nanoparticle conversion. We have produced QDs on substrates of different types by converting randomly and lithographically positioned nanoparticles into compound semiconductors in a chemical vapour deposition system. Electron microscopy and atomic force microscopy measurements reveal that the morphology of these QDs is similar to that of QDs produced by other techniques. Photo- and cathodoluminescence measurements show that the converted nanoparticles exhibit properties and behaviours typical of semiconductor QDs. These include quantum confinement, free-to-bound recombination and blinking. Production of multi-component QDs like InP, GaN, and InAsP on various substrates like Si, SiO2, and sapphire show that this technology can produce a wide variety of different types of QD on different substrates with minimal need for process optimization. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanotechnology
volume
18
publisher
IOP Publishing
external identifiers
  • WOS:000245230100010
  • Scopus:33947525239
ISSN
0957-4484
DOI
10.1088/0957-4484/18/10/105306
language
English
LU publication?
yes
id
5850c2de-0ce4-40f7-b75b-a978e3ea7094 (old id 731319)
date added to LUP
2008-01-03 10:08:44
date last changed
2016-10-13 04:45:55
@misc{5850c2de-0ce4-40f7-b75b-a978e3ea7094,
  abstract     = {We have developed a novel technology, called nanoparticle conversion, for producing compound semiconductor quantum dots (QDs) in which the dot size, surface density, position, and the materials system are all independently controlled. Nanoparticle conversion also lends itself to spatially controlled positioning of QDs. To demonstrate this technology we report the formation of InP QDs using nanoparticle conversion. We have produced QDs on substrates of different types by converting randomly and lithographically positioned nanoparticles into compound semiconductors in a chemical vapour deposition system. Electron microscopy and atomic force microscopy measurements reveal that the morphology of these QDs is similar to that of QDs produced by other techniques. Photo- and cathodoluminescence measurements show that the converted nanoparticles exhibit properties and behaviours typical of semiconductor QDs. These include quantum confinement, free-to-bound recombination and blinking. Production of multi-component QDs like InP, GaN, and InAsP on various substrates like Si, SiO2, and sapphire show that this technology can produce a wide variety of different types of QD on different substrates with minimal need for process optimization.},
  author       = {Wacaser, Brent and Dick Thelander, Kimberly and Zanolli, Zeila and Gustafsson, Anders and Deppert, Knut and Samuelson, Lars},
  issn         = {0957-4484},
  language     = {eng},
  publisher    = {ARRAY(0x8db3490)},
  series       = {Nanotechnology},
  title        = {Size-selected compound semiconductor quantum dots by nanoparticle conversion},
  url          = {http://dx.doi.org/10.1088/0957-4484/18/10/105306},
  volume       = {18},
  year         = {2007},
}