期刊
CHEMICAL PHYSICS LETTERS
卷 662, 期 -, 页码 35-41出版社
ELSEVIER
DOI: 10.1016/j.cplett.2016.09.004
关键词
Perovskite solar cells; Carbon nanotubes; Electrochemical impedance spectroscopy; Charge recombination; Hexabenzocoronene
资金
- Polymer-Based Materials for Harvesting Solar Energy (PHaSE), an Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001087]
- U.S. National Science Foundation Materials Research Science and Engineering Center (MRSEC) on Polymers [DMR-0820506]
Using impedance spectroscopy and computation, we show that incorporation of multi-walled carbon nanotubes (MWCNTs) in the bulk of the active layer of perovskite-based solar cells reduces charge recombination and increases the open circuit voltage. An similar to 87% reduction in recombination was achieved when MWCNTs were introduced in the planar-heterostructure perovskite solar cell containing mixed counterions. The open circuit voltage (Vac) of perovskite/MWCNTs devices was increased by 70 mV, while the short circuit current density (J(sc)) and fill factor (FF) remained unchanged. (C) 2016 Elsevier B.V. All rights reserved.
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