Journal
SOLAR ENERGY
Volume 147, Issue -, Pages 222-227Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2017.03.035
Keywords
Flexible perovskite solar cells; Thin perovskite films; MAI solution concentration; Sputtered inorganic electron transport layer
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Funding
- International Cooperation Project of the Ministry of Science and Technology [2014DFE60170]
- National Natural Science Foundation of China [61474065, 61674084]
- Tianjin Research Key Program of Application Foundation and Advanced Technology [15JCZDJC31300]
- Key Project in the Science & Technology Pillar Program of Jiangsu Province [BE2014147-3]
- 111 Project [B16027]
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A smooth perovskite film fully covering the substrate is of importance for flexible perovskite solar cells (PSCs). In this study, efficient flexible PSCs are fabricated onto conductive plastic substrate by a two-step coating method under ambient condition. By adjusting the concentration of precursor CH3NH3I (MAI), the morphology and thickness of perovskite layer is effectively tailored, according to SEM and AFM analysis, which consequently gives rise to a thin perovskite layer with smooth surface and smaller grain size. As a result, flexible PSCs with efficiency of 12.7% are prepared under ambient condition, and the excellent mechanical stability of flexible PSCs is also demonstrated with bending test under severe conditions. (C) 2017 Elsevier Ltd. All rights reserved.
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