WFRF:(Leitao M)
Search: WFRF:(Leitao M) > (2010-2014) > Thermodynamic pathw...
- 3 of 9
- Previous record
- Next record
- To hitlist
Thermodynamic pathway for the formation of SnSe and SnSe2 polycrystalline thin films by selenization of metal precursors
- Fernandes, P. A. (author)
- Sousa, M. G. (author)
-
- Salome, Pedro M. P. (author)
- Uppsala universitet,Fasta tillståndets elektronik
- show more...
- Leitao, J. P. (author)
- da Cunha, A. F. (author)
- show less...
- (creator_code:org_t)
- Royal Society of Chemistry (RSC), 2013
- 2013
- English.
- In: CrystEngComm. - : Royal Society of Chemistry (RSC). - 1466-8033. ; 15:47, s. 10278-10286
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- In this work, tin selenide thin films (SnSex) were grown on soda lime glass substrates by selenization of dc magnetron sputtered Sn metallic precursors. Selenization was performed at maximum temperatures in the range 300 degrees C to 570 degrees C. The thickness and the composition of the films were analysed using step profilometry and energy dispersive spectroscopy, respectively. The films were structurally and optically investigated by X-ray diffraction, Raman spectroscopy and optical transmittance and reflectance measurements. X-Ray diffraction patterns suggest that for temperatures between 300 degrees C and 470 degrees C, the films are composed of the hexagonal-SnSe2 phase. By increasing the temperature, the films selenized at maximum temperatures of 530 degrees C and 570 degrees C show orthorhombic-SnSe as the dominant phase with a preferential crystal orientation along the (400) crystallographic plane. Raman scattering analysis allowed the assignment of peaks at 119 cm(-1) and 185 cm(-1) to the hexagonal-SnSe2 phase and those at 108 cm(-1), 130 cm(-1) and 150 cm(-1) to the orthorhombic-SnSe phase. All samples presented traces of condensed amorphous Se with a characteristic Raman peak located at 255 cm(-1). From optical measurements, the estimated band gap energies for hexagonal-SnSe2 were close to 0.9 eV and 1.7 eV for indirect forbidden and direct transitions, respectively. The samples with the dominant orthorhombic-SnSe phase presented estimated band gap energies of 0.95 eV and 1.15 eV for indirect allowed and direct allowed transitions, respectively.
Keyword
- Engineering Science with specialization in Electronics
- Teknisk fysik med inriktning mot elektronik
Publication and Content Type
- ref (subject category)
- art (subject category)
- 3 of 9
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Fernandes, P. A.
- Sousa, M. G.
- Salome, Pedro M. ...
- Leitao, J. P.
- da Cunha, A. F.
- Articles in the publication
- CrystEngComm
- By the university
- Uppsala University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
