Gas phase grown silicon germanium nanocrystals

A. Mohan; F. D. Tichelaar; M. Kaiser; M. A. Verheijen; R. E I Schropp; J. K. Rath

doi:10.1016/j.cplett.2016.08.066

Gas phase grown silicon germanium nanocrystals

A. Mohan^*, F. D. Tichelaar, M. Kaiser, M. A. Verheijen, R. E I Schropp, J. K. Rath

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

Abstract

We report on the gas phase synthesis of highly crystalline and homogeneously alloyed Si_1−xGe_x nanocrystals in continuous and pulsed plasmas. Agglomerated nanocrystals have been produced with remarkable control over their composition by altering the precursor GeH₄ gas flow in a continuous plasma. We specially highlight that in the pulsed plasma mode, we obtain quantum-sized free standing alloy nanocrystals with a mean size of 7.3 nm. The presence of Si_1−xGe_x alloy particles is confirmed with multiple techniques, i.e. Raman spectroscopy, XRD (Xray diffraction) and HRTEM (high resolution transmission electron microscopy) studies, with each of these methods consistently yielding the same composition. The nanocrystals synthesized here have potential applications in band-gap engineering for multijunction solar cells.

Original language	English
Pages (from-to)	185-190
Number of pages	6
Journal	Chemical Physics Letters
Volume	661
DOIs	https://doi.org/10.1016/j.cplett.2016.08.066
Publication status	Published - 16 Sept 2016

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title = "Gas phase grown silicon germanium nanocrystals",

abstract = "We report on the gas phase synthesis of highly crystalline and homogeneously alloyed Si1−xGex nanocrystals in continuous and pulsed plasmas. Agglomerated nanocrystals have been produced with remarkable control over their composition by altering the precursor GeH4 gas flow in a continuous plasma. We specially highlight that in the pulsed plasma mode, we obtain quantum-sized free standing alloy nanocrystals with a mean size of 7.3 nm. The presence of Si1−xGex alloy particles is confirmed with multiple techniques, i.e. Raman spectroscopy, XRD (Xray diffraction) and HRTEM (high resolution transmission electron microscopy) studies, with each of these methods consistently yielding the same composition. The nanocrystals synthesized here have potential applications in band-gap engineering for multijunction solar cells.",

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doi = "10.1016/j.cplett.2016.08.066",

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T1 - Gas phase grown silicon germanium nanocrystals

AU - Mohan, A.

AU - Tichelaar, F. D.

AU - Kaiser, M.

AU - Verheijen, M. A.

AU - Schropp, R. E I

AU - Rath, J. K.

PY - 2016/9/16

Y1 - 2016/9/16

N2 - We report on the gas phase synthesis of highly crystalline and homogeneously alloyed Si1−xGex nanocrystals in continuous and pulsed plasmas. Agglomerated nanocrystals have been produced with remarkable control over their composition by altering the precursor GeH4 gas flow in a continuous plasma. We specially highlight that in the pulsed plasma mode, we obtain quantum-sized free standing alloy nanocrystals with a mean size of 7.3 nm. The presence of Si1−xGex alloy particles is confirmed with multiple techniques, i.e. Raman spectroscopy, XRD (Xray diffraction) and HRTEM (high resolution transmission electron microscopy) studies, with each of these methods consistently yielding the same composition. The nanocrystals synthesized here have potential applications in band-gap engineering for multijunction solar cells.

AB - We report on the gas phase synthesis of highly crystalline and homogeneously alloyed Si1−xGex nanocrystals in continuous and pulsed plasmas. Agglomerated nanocrystals have been produced with remarkable control over their composition by altering the precursor GeH4 gas flow in a continuous plasma. We specially highlight that in the pulsed plasma mode, we obtain quantum-sized free standing alloy nanocrystals with a mean size of 7.3 nm. The presence of Si1−xGex alloy particles is confirmed with multiple techniques, i.e. Raman spectroscopy, XRD (Xray diffraction) and HRTEM (high resolution transmission electron microscopy) studies, with each of these methods consistently yielding the same composition. The nanocrystals synthesized here have potential applications in band-gap engineering for multijunction solar cells.

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U2 - 10.1016/j.cplett.2016.08.066

DO - 10.1016/j.cplett.2016.08.066

M3 - Article

AN - SCOPUS:84985993416

SN - 0009-2614

VL - 661

SP - 185

EP - 190

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Gas phase grown silicon germanium nanocrystals

Abstract

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