Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000632962> ?p ?o ?g. }
Showing items 1 to 92 of
92
with 100 items per page.
- W2000632962 endingPage "3413" @default.
- W2000632962 startingPage "3409" @default.
- W2000632962 abstract "Porous silicon (PS) is usually prepared by the electrochemical anodization or the stain etching techniques. Recently, a new method consisting of exposing silicon substrates to acid vapours issued from a mixture of HNO3/HF was employed to generate highly luminescent PS layers. The so-called HNO3/HF vapour etching (VE) technique can be easily applied in various large area of silicon-based devices. Depending on the HNO3/HF volume ratio, we found that VE silicon results in the formation of PS and/or a luminescent (NH4)2SiF6 powder-like phase. FTIR spectra of VE-based PS layers formed at HNO3/HF volume ratio ranging between 1/100-1/3 contain N-H and Si-F bonds related to NH4+ and SiF62– ions in addition to the conventional SiHx species. These nitride and fluoride groups were identified to be associated to the (NH4)2SiF6 powder-like phase which in turn contains small Si nanoparticles embedded in a SiOx matrix. The presence of such structures was explained as being the product of the VE technique itself. For vapours rich in HNO3 (HNO3/HF volume ratio >1/4), the VE method can produce almost only the luminescent (NH4)2SiF6 compound. The VE-based PS is essentially composed of dot–like Si particles with sizes not exceeding 5 nm and emitting a photoluminescence (PL) band around 1.93 eV. The PL band of the VE-based PS presents a shoulder at 2.09 eV, which becomes more significant after oxidation in air. This shoulder at 2.09 eV was attributed to an excitonic emission from the energy levels of the SiOx surrounding the smallest Si nanocrystallites. The PL band emission of the (NH4)2SiF6 powder presents two peaks. The first one was attributed to Si nanocrystallites emitting at 1.98 eV. The second peak could be associated to the smallest nanocrystallites (≤1.5 nm). For these crystallites, excitons are trapped on the SiOx energy levels, leading to a maximum PL band emission around 2.1 eV. This PL band seems to have the same origin than the small shoulder observed in the PL emission of PS. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
- W2000632962 created "2016-06-24" @default.
- W2000632962 creator A5050506635 @default.
- W2000632962 creator A5060110772 @default.
- W2000632962 creator A5079650989 @default.
- W2000632962 creator A5083443540 @default.
- W2000632962 date "2005-06-01" @default.
- W2000632962 modified "2023-10-18" @default.
- W2000632962 title "Structural and luminescence properties of vapour‐etched porous silicon and related compounds" @default.
- W2000632962 doi "https://doi.org/10.1002/pssc.200561191" @default.
- W2000632962 hasPublicationYear "2005" @default.
- W2000632962 type Work @default.
- W2000632962 sameAs 2000632962 @default.
- W2000632962 citedByCount "18" @default.
- W2000632962 countsByYear W20006329622013 @default.
- W2000632962 countsByYear W20006329622014 @default.
- W2000632962 countsByYear W20006329622016 @default.
- W2000632962 countsByYear W20006329622017 @default.
- W2000632962 countsByYear W20006329622018 @default.
- W2000632962 countsByYear W20006329622020 @default.
- W2000632962 crossrefType "journal-article" @default.
- W2000632962 hasAuthorship W2000632962A5050506635 @default.
- W2000632962 hasAuthorship W2000632962A5060110772 @default.
- W2000632962 hasAuthorship W2000632962A5079650989 @default.
- W2000632962 hasAuthorship W2000632962A5083443540 @default.
- W2000632962 hasConcept C100460472 @default.
- W2000632962 hasConcept C113196181 @default.
- W2000632962 hasConcept C127413603 @default.
- W2000632962 hasConcept C148869448 @default.
- W2000632962 hasConcept C159985019 @default.
- W2000632962 hasConcept C169760540 @default.
- W2000632962 hasConcept C171250308 @default.
- W2000632962 hasConcept C178790620 @default.
- W2000632962 hasConcept C185592680 @default.
- W2000632962 hasConcept C191897082 @default.
- W2000632962 hasConcept C192562407 @default.
- W2000632962 hasConcept C2776685891 @default.
- W2000632962 hasConcept C2776967294 @default.
- W2000632962 hasConcept C2777431650 @default.
- W2000632962 hasConcept C2777585854 @default.
- W2000632962 hasConcept C2778024649 @default.
- W2000632962 hasConcept C2778183973 @default.
- W2000632962 hasConcept C2779227376 @default.
- W2000632962 hasConcept C42360764 @default.
- W2000632962 hasConcept C49040817 @default.
- W2000632962 hasConcept C544956773 @default.
- W2000632962 hasConcept C85080765 @default.
- W2000632962 hasConcept C86803240 @default.
- W2000632962 hasConceptScore W2000632962C100460472 @default.
- W2000632962 hasConceptScore W2000632962C113196181 @default.
- W2000632962 hasConceptScore W2000632962C127413603 @default.
- W2000632962 hasConceptScore W2000632962C148869448 @default.
- W2000632962 hasConceptScore W2000632962C159985019 @default.
- W2000632962 hasConceptScore W2000632962C169760540 @default.
- W2000632962 hasConceptScore W2000632962C171250308 @default.
- W2000632962 hasConceptScore W2000632962C178790620 @default.
- W2000632962 hasConceptScore W2000632962C185592680 @default.
- W2000632962 hasConceptScore W2000632962C191897082 @default.
- W2000632962 hasConceptScore W2000632962C192562407 @default.
- W2000632962 hasConceptScore W2000632962C2776685891 @default.
- W2000632962 hasConceptScore W2000632962C2776967294 @default.
- W2000632962 hasConceptScore W2000632962C2777431650 @default.
- W2000632962 hasConceptScore W2000632962C2777585854 @default.
- W2000632962 hasConceptScore W2000632962C2778024649 @default.
- W2000632962 hasConceptScore W2000632962C2778183973 @default.
- W2000632962 hasConceptScore W2000632962C2779227376 @default.
- W2000632962 hasConceptScore W2000632962C42360764 @default.
- W2000632962 hasConceptScore W2000632962C49040817 @default.
- W2000632962 hasConceptScore W2000632962C544956773 @default.
- W2000632962 hasConceptScore W2000632962C85080765 @default.
- W2000632962 hasConceptScore W2000632962C86803240 @default.
- W2000632962 hasIssue "9" @default.
- W2000632962 hasLocation W20006329621 @default.
- W2000632962 hasOpenAccess W2000632962 @default.
- W2000632962 hasPrimaryLocation W20006329621 @default.
- W2000632962 hasRelatedWork W1967472669 @default.
- W2000632962 hasRelatedWork W1981502041 @default.
- W2000632962 hasRelatedWork W2014912044 @default.
- W2000632962 hasRelatedWork W2028501244 @default.
- W2000632962 hasRelatedWork W2031218666 @default.
- W2000632962 hasRelatedWork W2048483340 @default.
- W2000632962 hasRelatedWork W2081185821 @default.
- W2000632962 hasRelatedWork W2891305963 @default.
- W2000632962 hasRelatedWork W4294031353 @default.
- W2000632962 hasRelatedWork W4310366799 @default.
- W2000632962 hasVolume "2" @default.
- W2000632962 isParatext "false" @default.
- W2000632962 isRetracted "false" @default.
- W2000632962 magId "2000632962" @default.
- W2000632962 workType "article" @default.