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Energies 2016, 9(5), 376; doi:10.3390/en9050376

Fabrication and Characterization of CH3NH3PbI3−xyBrxCly Perovskite Solar Cells

Department of Materials Science, the University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan
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Author to whom correspondence should be addressed.
Academic Editor: Narottam Das
Received: 22 March 2016 / Revised: 28 April 2016 / Accepted: 6 May 2016 / Published: 17 May 2016
(This article belongs to the Special Issue Nano-Structured Solar Cells)
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Abstract

Fabrication and characterization of CH3NH3PbI3−xyBrxCly perovskite solar cells using mesoporous TiO2 as electron transporting layer and 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene as a hole-transporting layer (HTL) were performed. The purpose of the present study is to investigate role of halogen doping using iodine (I), bromine (Br) and chlorine (Cl) compounds as dopant on the photovoltaic performance and microstructures of CH3NH3PbI3−xyBrxCly perovskite solar cells. The X-ray diffraction identified a slight decrease of crystal spacing in the perovskite crystal structure doped with a small amount of I, Br, and Cl in the perovskite compounds. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) showed the perovskite crystal behavior depended on molar ratio of halogen of Pb, I, Br and Cl. Incorporation of the halogen doping into the perovskite crystal structure improved photo generation, carrier diffusion without carrier recombination in the perovskite layer and optimization of electronic structure related with the photovoltaic parameters of open-circuit voltage, short-circuit current density and conversion efficiency. The energy diagram and photovoltaic mechanisms of the perovskite solar cells were discussed in the context of the experimental results. View Full-Text
Keywords: photovoltaic property; perovskite; solar cell; crystal structure; microstructure photovoltaic property; perovskite; solar cell; crystal structure; microstructure
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MDPI and ACS Style

Suzuki, A.; Okada, H.; Oku, T. Fabrication and Characterization of CH3NH3PbI3−xyBrxCly Perovskite Solar Cells. Energies 2016, 9, 376.

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