Solution-Processed Indium Doped Zinc Oxide as Electron Transport Layer for Inverted Polymer Solar Cells
Solution-Processed Indium Doped Zinc Oxide as Electron Transport Layer for Inverted Polymer Solar Cells
- Author(s): P. Morvillo ; R. Diana ; E. Bobeico ; C. Minarini
- DOI: 10.1049/cp.2016.0930
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- Author(s): P. Morvillo ; R. Diana ; E. Bobeico ; C. Minarini Source: 18th Italian National Conference on Photonic Technologies (Fotonica 2016), 2016 page ()
- Conference: 18th Italian National Conference on Photonic Technologies (Fotonica 2016)
- DOI: 10.1049/cp.2016.0930
- ISBN: 978-1-78561-268-8
- Location: Rome, Italy
- Conference date: 6-8 June 2016
- Format: PDF
In this work, we report the synthesis and the application of a low-temperature sol-gel In-doped zinc oxide (IZO) thin film with various indium content as an electron transport layer (ETL) for high efficiency inverted polymer solar cells (PSCs). The IZO precursor was prepared by dissolving zinc acetate and ethanolamine in the 2-methoxyethanol in the presence of InCl3 at different concentration. Doped ZnO thin films were then deposited on indium tin oxide (ITO)/glass substrates by spin coating the above solution and annealed at 150°C for 5' in air. Inverted polymer solar cells with the configuration ITO/IZO/photoactive layer/MoO3/Ag were realized in order to investigate the performance of the IZO thin film. The photoactive layer was a blend of poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) and [6,6]-phenyl C71 butyric acid methyl ester ([70]PCBM). We made a comparative study of the photovoltaic behavior of PSCs realized employing IZO films with various indium contents. The best efficiency of 9.27% was reached using a 1 at% IZO film. The improved performance of such device is due to the better charge collection efficiency of this ETL.
Inspec keywords: conducting polymers; zinc compounds; solar cells; spin coating; II-VI semiconductors; photovoltaic effects; indium; sol-gel processing
Subjects: Solar cells and arrays; Photoelectric conversion; solar cells and arrays; Deposition from liquid phases; Photoconduction and photovoltaic effects; photodielectric effects; Deposition from liquid phases (melts and solutions)
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