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. Issue 17 (20th April 2017)

• Record Type: Journal Article
• Authors: Peiris, T. A. Nirmal; Baranwal, Ajay K.; Kanda, Hiroyuki; Fukumoto, Shota; Kanaya, Shusaku; Cojocaru, Ludmila; Bessho, Takeru; Miyasaka, Tsutomu; Segawa, Hiroshi; Ito, Seigo
• Is Part Of: Nanoscale. Volume 9:Issue 17(2017)
• Page Start: 5475
• Page End: 5482
• Publication Date: 2017-04-20
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c7nr00372b
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Our study indicates that the capping layer thickness of MAPbI3 is highly affecting the hole collecting effect of NiO in mesoscopic PSCs. 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 ( J sc ) of 22.38 mA cm −2, an open circuit voltage ( V oc ) 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.