STUDY OF PHOTOVOLTAGE STABILITY ON NANODIAMOND-POLYPYRROLE COMPOSITES BY KELVIN PROBE METHOD

1,2 CHANG Yen-Chen
Co-authors:
1,2 MILIAIEVA Daria 1,2 REZEK Bohuslav
Institutions:
1 Institute of Physics of the Czech Academy of Science, Prague, Czech Republic, changyen@fzu.cz
2 Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
Conference:
10th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 17th - 19th 2018
Proceedings:
Proceedings 10th International Conference on Nanomaterials - Research & Application
Pages:
164-168
ISBN:
978-80-87294-89-5
ISSN:
2694-930X
Published:
28th February 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
62 views / 16 downloads
Abstract

Diamond thin films and nanodiamond particles are considered promising for addressing the long-term challenge of organic photovoltaics: efficiency and stability. In this work, we characterize stability of surface potential and photovoltage on polyfunctional detonation nanodiamonds merged with polypyrrole oligomers. The polyfunctional-detonation nanodiamond (poly-DND), polypyrrole (PPy), and poly-DND/PPy composites were prepared on p-type silicon wafer substrates. In order to investigate illumination induced effects, surface potential and photovoltage of the samples were characterized by macroscopic Kelvin Probe method as a function of time. The poly-DND/PPy composite exhibits better stability of surface potential and surface photovoltage in short-term as well as in long-term (up to 8 weeks) compared to individual materials. The nanodiamond composites thus appear advantageous for use in organic photovoltaics.

Keywords: Diamond, nanoparticles, polypyrrole, scanning Kelvin probe

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