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Lewis Acid Doping Induced Synergistic Effects on Electronic and Morphological Structure for Donor and Acceptor in Polymer Solar Cells
Xi An Jiao Tong Univ, Peoples R China.
Xi An Jiao Tong Univ, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Xi An Jiao Tong Univ, Peoples R China.
Xi An Jiao Tong Univ, Peoples R China.
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2018 (English)In: ADVANCED ENERGY MATERIALS, ISSN 1614-6832, Vol. 8, no 19, article id 1703672Article in journal (Refereed) Published
Abstract [en]

Due to the attraction of optimizing the electronic structure beyond chemical synthesis, molecular doping has recently aroused wide interest in the field of organic solar cells. However, the selection of limited dopants confines its successful application. Inspired by the Lewis base characteristics of the photovoltaic materials, the Lewis acid as novel dopant is introduced in organic solar cells. In both fullerene and nonfullerene based blends, Lewis acid doping leads to increased photovoltaic performance. Detailed experiments reveal that Lewis acid doping has a synergistic effect on modifying the polymers electronic properties and the acceptors nanostructure even at low doping concentration, and these are simultaneously responsible for the device improvements. Based on the mechanism studies, it is proposed that the Lewis acid-doped polymers anions produce induced dipole on the acceptor, this increases the intermolecular interaction and facilitates the morphology optimization. It is believed that the synergistic effect by Lewis acid doping greatly expands the application of doped organic solar cells, in concert with other existing methods to yield higher efficiency values.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2018. Vol. 8, no 19, article id 1703672
Keywords [en]
Lewis acid doping; molecular doping; morphology; organic solar cells; synchrotrons
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Other Chemistry Topics
Identifiers
URN: urn:nbn:se:liu:diva-149857DOI: 10.1002/aenm.201703672ISI: 000437667800017OAI: oai:DiVA.org:liu-149857DiVA, id: diva2:1236441
Note

Funding Agencies|Ministry of Science and Technology [2016YFA0200700]; National Natural Science Foundation of China [21504066, 21534003, 21704082]; Knut and Alice Wallenberg Scholar; Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]

Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02

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