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

Journal article


Publication Details

Author(s): Schuster M, Wernicke T, Möckel S, Wellmann P
Journal: International Journal of Nanoparticles and Nanotechnology
Publication year: 2016
Volume: 2:006
Language: English


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 Authors / FAU Editors

Möckel, Stefan
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Schuster, Matthias
Institute Materials for Electronics and Energy Technology (i-MEET)
Wellmann, Peter Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Wernicke, Tobias
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)


How to cite

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).

BibTeX: 

Last updated on 2018-10-08 at 14:23