Journal
ELECTROCHIMICA ACTA
Volume 222, Issue -, Pages 1417-1423Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.11.119
Keywords
Perovskite solar cells; hole transporting material; soluble copper phthalocyanine; spiro-OMeTAD
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Funding
- Ministry of Science, Research and Technology of Iran
- Sharif University of Technology [G940309]
- Iran National Science Foundation (INSF)
- National Natural Science Foundation of China [21303081]
- Special Funds for the Development of Strategic Emerging Industries in Shenzhen [JCYJ20160530184453345]
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Perovskite solar cells have been constructed under ambient conditions by using 2,2',7,7'-Tetrakis-(N,N-di-4-methoxyphenylamino)-9,9'-spirobifluorene (spiro-OMeTAD) mixed with a small quantity of soluble tetra-n-butyl substituted copper phthalocyanine as hole transporting material. The introduction of the phthalocyanine derivative resulted in an impressive increase of cell efficiency, which changed from 10.4% in the absence to 15.4% in the presence of phthalocyanine. This effect is related to the creation of deep traps in the hole transporting phase which block back-travelling electrons as well as to the improvement of the structural quality of the spiro-OMeTAD film in the presence of phthalocyanine. Both functionalities decrease shunt paths within the hole transporting phase resulting in increasing the fill factor and the open-circuit voltage of the cell. (C) 2016 Elsevier Ltd. All rights reserved.
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