Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Zinc oxide is an optoelectronic material with a plethora of applications in electronic and optoelectronic devices. The interest in growing nanostructures on paper-like substrates is mainly because of their low cost, environmentally friendly properties, biodegradability, recyclability, mechanical flexibility and compatibility with the most printing processes. The focus of this work is the growing of oriented ZnO nanostructures on paper substrate through chemical bath deposition and their applications on third generation solar cells. Aiming to obtain a flexible cell configuration a polymeric electrolyte and a flexible counter electrode were used. The paper electrodes were prepared with the prior deposition of the seed layer of the zinc acetate solution by spray pyrolysis. The ZnO nano and microstructures were grown by chemical bath deposition by using low temperatures and short periods of time. A polymer gel electrolyte composed of a poly (ethylene oxide) derivative, poly(ethylene oxide-co-2-(2-methoxyethoxy) ethyl glycidyl ether), mixed with gamma-butyrolactone (GBL), LiI and I2 can be employed. Finally the platinum counter electrode was deposited by sputtering on flexible ITO-PETsubstrate. The ZnO nano and microstructures grown on paper were characterized by FEG-SEM (Figure 1a), AFM and DRX. The solar cells were characterized by current-potential (I-V) (Figure 1b), curves in the dark and under illumination, and electrochemical impedance spectroscopy (EIS).Zinc oxide is an optoelectronic material with a plethora of applications in electronic and optoelectronic devices. The interest in growing nanostructures on paper-like substrates is mainly because of their low cost, environmentally friendly properties, biodegradability, recyclability, mechanical flexibility and compatibility with the most printing processes [1]. The focus of this work is the growing of oriented ZnO nanostructures on paper substrate through chemical bath deposition and their applications on third generation solar cells. Aiming to obtain a flexible cell configuration a polymeric electrolyte and a flexible counter electrode were used. The paper electrodes were prepared with the prior deposition of the seed layer of the zinc acetate solution by spray pyrolysis. The ZnO nano and microstructures were grown by chemical bath deposition by using low temperatures and short periods of time. A polymer gel electrolyte composed of a poly (ethylene oxide) derivative, poly(ethylene oxide-co-2-(2-methoxyethoxy) ethyl glycidyl ether), mixed with gamma-butyrolactone (GBL), LiI and I2 can be employed. Finally the platinum counter electrode was deposited by sputtering on flexible ITO-PETsubstrate. The ZnO nano and microstructures grown on paper were characterized by FEG-SEM (Figure 1a), AFM and DRX. The solar cells were characterized by current-potential (I-V) (Figure 1b), curves in the dark and under illumination, and electrochemical impedance spectroscopy (EIS).
Fig 1: a) FEG-SEM images of ZnO oriented nanostructures grown on paper substrate. b) I-V Curve of DSSC on paper. AM 1.5 solar simulator (100 mW.cm2).
Vanmaekelbergh, D.; Vugt, L. K. V. ZnO nanowire lasers. Nanoscale 2011, 3, 2783. Manekkathodi, A.; Lu, M-Y. C.; Wang, W. ; Chen, L-J. Direct Growth of Aligned Zinc Oxide Nanorods on Paper Substrates for Low-Cost Flexible Electronics. Advanced Materials 2010, 22, 4059-4063.
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