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Title: | The role of hafnium acetylacetonate buffer layer on the performance of lead halide perovskite solar cells derived from dehydrated lead acetate as Pb source |
Authors: | Sanni, D. M. 1 Ntsoenzok, E. E. Saintaimé, E. Adeniji, S, A. Oyelade, O. V. Koech, R. K. Amune, D. I. Bello, A. |
Keywords: | hafnium acetylacetonate lead halide perovskite dehydrated lead acetate |
Issue Date: | 2020 |
Publisher: | AIP |
Abstract: | In this research, we demonstrated the use of hafnium acetylacetonate (Hfaca) dissolved in ethanol as a buffer layer for perovskite solar cells from non-halide Pb (dehydrated lead acetate) source material. The inverted p-i-n planar heterojunction structure was employed in this work. A one step spin-coating method was used in depositing the perovskite solution before thermal annealing at 90 ○ C for 5 min to form the perovskite film. Hfaca has been previously used as a buffer layer, but the optimal concentration has not been reported. The optimum concentration of Hfaca was found to be 1.0 mg/ml, resulting in a power conversion efficiency (PCE) of 12.23% corresponding to more than 30% improvement when compared to the control device (phenyl-C 61 -butyric acid methyl ester/Ag) without Hfaca, which has a PCE of 8.89%. Hfaca as a buffer layer leads to superior stability, retaining about 90% of its original PCE values after 15 days of storage in a glove box, compared to the control device, which retains 70% of the initial PCE value under the same storage. |
URI: | http://ir.mu.ac.ke:8080/jspui/handle/123456789/5060 |
Appears in Collections: | School of Biological and Physical Sciences |
Files in This Item:
File | Description | Size | Format | |
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5.0012646.pdf | 3.06 MB | Adobe PDF | View/Open |
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