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Investigating the effects of carbon-based counter electrode layers on the efficiency of hole-transporter-free perovskite solar cells

10$
ARTICLE DOWNLOAD

Investigating the effects of carbon-based counter electrode layers on the efficiency of hole-transporter-free perovskite solar cells

10$

I. Onwubiko, W. S. Khan, B. Subeshan & R. Asmatulu 

Abstract

Perovskite solar cells with organometal halides of inorganic–organic hybrid materials have been under investigation in the area of energy-conversion research and development. Among the various perovskite solar cells, the carbon-based hole-transporter-free type is a better option because of its low materials and manufacturing costs, availability, high efficiency, and long-term stability. In this study, carbon black (CB) and multiwall carbon nanotube (MWCNT) paste layers were prepared and applied to fluorine-doped tin oxide (FTO) conductive surfaces of the hole-transporter-free CH3NH3PbI3 perovskite solar cells as counter electrodes using the spin coating process. Cell performance studies were conducted on the prepared samples using a solar simulator. The effects of the current density–voltage (JV) characteristics and hysteresis of perovskite solar cells of both CB- and MWCNT-based layers were evaluated in detail. It was determined that MWCNT-based solar cells have better short-circuit densities and possess higher power conversion efficiencies compared to CB paste-based solar cells. In both cases, the efficiencies of the carbon-based perovskite solar cells were considerably enhanced, which might be useful to improve the overall perovskite solar cell efficiencies.

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Year 2020
Language English
Format PDF
DOI 10.1007/s40974-020-00150-w