Construction of perovskite solar cells using inorganic hole-extracting components

Esmaiel Nouri, Mohammad Reza Mohammadi (Lead / Corresponding author), Panagiotis Lianos (Lead / Corresponding author)

Research output: Contribution to journalArticle

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Abstract

A NiOx−graphene oxide (NiOx−GO) hybrid has been prepared by a simple solution-processed method and was used as hole-extraction material in perovskite solar cells with either gold or carbon as back contact electrode. The impact of GO content on the optoelectronic behavior of NiOx and the photovoltaic performance of the fabricated devices has been studied. Thus, GO incorporation showed a significant improvement in the performance of NiOx-based devices. The best attained efficiency was 13.3%, and it was 45% higher than that with pure NiOx. This is attributed to a significant improvement in the hole extraction, recombination resistance, and energy-level matching in comparison to pure NiOx. In addition, NiOx−GO/Au-based perovskite solar cell devices showed a negligible hysteresis effect and high reliability and repeatability. When carbon was used as back contact electrode, the obtained efficiencies were lower, but it leaves space for improvement. Devices based on inorganic hole transporters NiOx or NiOx−GO demonstrated higher stability in ambient air compared to a standard cell based on spiro-OMeTAD.

Original languageEnglish
Pages (from-to)46-54
Number of pages9
JournalACS Omega
Volume3
Issue number1
Early online date4 Jan 2018
DOIs
Publication statusPublished - 31 Jan 2018

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