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Modification of light absorption in thin CuInS2 films by sprayed Au nanoparticles.

Katerski A, Kärber E, Acik IO, Dolgov L, Mere A, Sildos I, Mikli V, Krunks M - Nanoscale Res Lett (2014)

Bottom Line: The prepared films show plasmonic light absorption with increasing intensity in the spectral range of 500- 800 nm when increasing the volume of HAuCl4 solution sprayed.When compared to bare CIS on glass, the absorptance was increased ca. 4.5 times in the case of glass/Au-NP/CIS and ca. 3 times in the case of glass/CIS/Au-NP configuration.The glass/Au-NP/CIS configuration had an advantage since Au-NP could be embedded without chemically damaging the CIS.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Thin Film Chemical Technologies, Department of Materials Science, Tallinn University of Technology, Tallinn, EE-19086, Estonia, atanas.katerski@ttu.ee.

ABSTRACT
The chemical spray pyrolysis method was used to deposit CuInS2 (CIS) thin films and Au nanoparticles (NPs) in two configurations: glass/Au-NP layer covered with CuInS2 film (Au-NP/CIS) and glass/CuInS2 films covered with Au-NP layer (CIS/Au-NP). According to X-ray diffraction (XRD), the spray of 2 mM HAuCl4 aqueous solution with a volume of 2.5 to 15 ml onto a glass substrate at 340°C results in metallic Au nanoparticles with a similar mean crystallite size in the range of 30 - 38 nm. The mean crystallite sizes remain in the range of 15 - 20 nm when grown onto a CIS film. The prepared films show plasmonic light absorption with increasing intensity in the spectral range of 500- 800 nm when increasing the volume of HAuCl4 solution sprayed. When compared to bare CIS on glass, the absorptance was increased ca. 4.5 times in the case of glass/Au-NP/CIS and ca. 3 times in the case of glass/CIS/Au-NP configuration. The glass/Au-NP/CIS configuration had an advantage since Au-NP could be embedded without chemically damaging the CIS.

No MeSH data available.


SEM images of CIS thin films covered with Au nanoparticles. Au nanoparticles were obtained by spray of 2 mM HAuCl4 aqueous solution at 340°C onto CIS films using solution amounts of (a) 2.5 ml, (b) 10 ml, and (c) 15 ml.
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Fig5: SEM images of CIS thin films covered with Au nanoparticles. Au nanoparticles were obtained by spray of 2 mM HAuCl4 aqueous solution at 340°C onto CIS films using solution amounts of (a) 2.5 ml, (b) 10 ml, and (c) 15 ml.

Mentions: The SEM images of Au nanoparticles deposited by spray on top of the previously grown CIS film (CIS/Au-NP) are presented in Figure 5. The spray of 2.5 ml of 2 mM HAuCl4 solution resulted in Au nanoparticles with a size of 20 to 60 nm on the CIS film (Figure 5a, Table 1). Increasing the amount of HAuCl4 solution to 10 ml resulted in a more dense coverage of the CIS films with Au particles (Figure 5b), while the mean size of the particles remains unchanged (20 to 60 nm). Further increasing the solution amount to 15 ml (Figure 5c) resulted in Au nanoparticles with the size of ca. 20 nm as well as in agglomerates with the size of ca. 200 nm (Table 1).Figure 5


Modification of light absorption in thin CuInS2 films by sprayed Au nanoparticles.

Katerski A, Kärber E, Acik IO, Dolgov L, Mere A, Sildos I, Mikli V, Krunks M - Nanoscale Res Lett (2014)

SEM images of CIS thin films covered with Au nanoparticles. Au nanoparticles were obtained by spray of 2 mM HAuCl4 aqueous solution at 340°C onto CIS films using solution amounts of (a) 2.5 ml, (b) 10 ml, and (c) 15 ml.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493990&req=5

Fig5: SEM images of CIS thin films covered with Au nanoparticles. Au nanoparticles were obtained by spray of 2 mM HAuCl4 aqueous solution at 340°C onto CIS films using solution amounts of (a) 2.5 ml, (b) 10 ml, and (c) 15 ml.
Mentions: The SEM images of Au nanoparticles deposited by spray on top of the previously grown CIS film (CIS/Au-NP) are presented in Figure 5. The spray of 2.5 ml of 2 mM HAuCl4 solution resulted in Au nanoparticles with a size of 20 to 60 nm on the CIS film (Figure 5a, Table 1). Increasing the amount of HAuCl4 solution to 10 ml resulted in a more dense coverage of the CIS films with Au particles (Figure 5b), while the mean size of the particles remains unchanged (20 to 60 nm). Further increasing the solution amount to 15 ml (Figure 5c) resulted in Au nanoparticles with the size of ca. 20 nm as well as in agglomerates with the size of ca. 200 nm (Table 1).Figure 5

Bottom Line: The prepared films show plasmonic light absorption with increasing intensity in the spectral range of 500- 800 nm when increasing the volume of HAuCl4 solution sprayed.When compared to bare CIS on glass, the absorptance was increased ca. 4.5 times in the case of glass/Au-NP/CIS and ca. 3 times in the case of glass/CIS/Au-NP configuration.The glass/Au-NP/CIS configuration had an advantage since Au-NP could be embedded without chemically damaging the CIS.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Thin Film Chemical Technologies, Department of Materials Science, Tallinn University of Technology, Tallinn, EE-19086, Estonia, atanas.katerski@ttu.ee.

ABSTRACT
The chemical spray pyrolysis method was used to deposit CuInS2 (CIS) thin films and Au nanoparticles (NPs) in two configurations: glass/Au-NP layer covered with CuInS2 film (Au-NP/CIS) and glass/CuInS2 films covered with Au-NP layer (CIS/Au-NP). According to X-ray diffraction (XRD), the spray of 2 mM HAuCl4 aqueous solution with a volume of 2.5 to 15 ml onto a glass substrate at 340°C results in metallic Au nanoparticles with a similar mean crystallite size in the range of 30 - 38 nm. The mean crystallite sizes remain in the range of 15 - 20 nm when grown onto a CIS film. The prepared films show plasmonic light absorption with increasing intensity in the spectral range of 500- 800 nm when increasing the volume of HAuCl4 solution sprayed. When compared to bare CIS on glass, the absorptance was increased ca. 4.5 times in the case of glass/Au-NP/CIS and ca. 3 times in the case of glass/CIS/Au-NP configuration. The glass/Au-NP/CIS configuration had an advantage since Au-NP could be embedded without chemically damaging the CIS.

No MeSH data available.