Determination of the Molar Extinction Coefficient of Colloidal Selenium for Optical Characterization of Stabilized Nanoparticulate Dispersions

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Details zur Publikation

Autor(en): Schuster M, Wernicke T, Möckel S, Wellmann P
Zeitschrift: International Journal of Nanoparticles and Nanotechnology
Jahr der Veröffentlichung: 2016
Band: 2:006
Sprache: Englisch


Abstract


To prepare fully printed copper-indium-diselenide solar-cell-absorbers it is necessary to have well defined and printable precursor-inks. In this work, the synthesis and different approaches for the colloidal stabilization of Selenium (Se) nanoparticles are presented, which should ultimately serve as a selenium source for CISe absorbers. The produced particles were stabilized with different concentrations of Polyvinylpyrrolidone (PVP) and micelles (TX100) respectively. The resulting suspensions were analyzed in aspect of particle size and

colloidal stability using dynamic light scattering (DLS). It was shown, that both approaches lead to stable colloidal suspensions with ca. 80 - 100 nm particle size. The PVP stabilized suspension stays stable for four weeks at a Zeta potential of > 35 - 25 mV whereas the TX100 stabilized suspension was only short-time-stable due to loss in Zeta potential over time. UV/VIS spectroscopy and Lambert-Beer’s law were used to determine the

concentration of Se in the dispersion. The molar extinction coefficient ε of colloidal selenium was calculated to be 1.44 × 10³ l/(mol·cm) for ε (Se) respectively 2.63 × 107 l/(mol·cm) for ε (Se-NP) ± 9 % in both cases.



FAU-Autoren / FAU-Herausgeber

Möckel, Stefan
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Schuster, Matthias
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Wellmann, Peter Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Wernicke, Tobias
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)


Zitierweisen

APA:
Schuster, M., Wernicke, T., Möckel, S., & Wellmann, P. (2016). Determination of the Molar Extinction Coefficient of Colloidal Selenium for Optical Characterization of Stabilized Nanoparticulate Dispersions. International Journal of Nanoparticles and Nanotechnology, 2:006.

MLA:
Schuster, Matthias, et al. "Determination of the Molar Extinction Coefficient of Colloidal Selenium for Optical Characterization of Stabilized Nanoparticulate Dispersions." International Journal of Nanoparticles and Nanotechnology 2:006 (2016).

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Zuletzt aktualisiert 2018-10-08 um 14:23