Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 154, Issue -, Pages 18-22Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2016.04.034
Keywords
ZnO; CH3NH3PbI3; Perovskite; Nanowall; Nanostructure
Funding
- Ministry of Science and Technology (MOST), Taiwan, ROC [NSC103-2221-E-027-029-MY2, 102-2221-E-006-186-MY3]
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This paper reports on the fabrication of ZnO nanowalls for use as an electron collecting layer (ECL) in CH3NH3PbI3 perovskite solar cells (PSCs). Two-dimension ZnO nanowalls were grown using a low temperature chemical bath method with a thin Al film as a seed layer. We compared electron collecting layers based on nanowalls and sol-gel derived ZnO thin film in PSCs and sought to identify the mechanism underlying the collection of electrons. The proposed ZnO nanowalls achieved a fill factor significantly higher than that of ZnO thin films, which translated into a remarkable improvement in power conversion efficiency, reaching 13.6% under AM 1.5G illumination. (C) 2016 Elsevier B.V. All rights reserved.
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