Enhancement of the hole conducting effect of NiO by a N2 blow drying method in printable perovskite solar cells with low-temperature carbon as the counter electrode

T. A. Nirmal Peiris, Ajay K. Baranwal, Hiroyuki Kanda, Shota Fukumoto, Shusaku Kanaya, Ludmila Cojocaru, Takeru Bessho, Tsutomu Miyasaka, Hiroshi Segawa, Seigo Ito

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27 Citations (Scopus)

Abstract

In this article, we demonstrate for the first time a mesoscopic printable perovskite solar cell (PSC) using NiO as the hole transporting material and low-temperature processed carbon as the counter electrode. A single deposition method assisted by N2 blow drying was used for the deposition of MAPbI3 on a TiO2/ZrO2/NiO screen-printed electrode. As the final step a low-temperature processing (i.e. 75 °C) carbon counter layer was fabricated on MAPbI3 by a blade coating method. It is found that the capping layer thickness of MAPbI3 has a significant effect on the device efficiency, especially when NiO is introduced as a hole transporting material into the structure. Electrochemical impedance spectroscopy demonstrates good charge transport characteristics for the device with a thin MAPbI3 capping layer obtained by the N2 blow drying method. Our best performing device demonstrated a remarkable photovoltaic performance with a short-circuit current density (Jsc) of 22.38 mA cm-2, an open circuit voltage (Voc) of 0.97 V, and a fill factor (FF) of 0.50 corresponding to a photo-conversion efficiency (PCE) of 10.83%. Moreover, the un-encapsulated device exhibited advantageous stability over 1000 h in air in the dark.

Original languageEnglish
Pages (from-to)5475-5482
Number of pages8
JournalNanoscale
Volume9
Issue number17
DOIs
Publication statusPublished - 1 Jan 2017
Externally publishedYes

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