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Issue 19, 2016
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Synergistic effects of three-dimensional orchid-like TiO2 nanowire networks and plasmonic nanoparticles for highly efficient mesoscopic perovskite solar cells

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Abstract

TiO2 nanoparticle (TiO2 NP)-based mesoscopic electron transport structures have been frequently used in organic–inorganic hybrid perovskite solar cells (PSCs) for rapid electron transport. However, TiO2 NPs that are densely agglomerated in the scaffold layer may inhibit the penetration of a perovskite solution thereby deteriorating the device performance. Here, we use three-dimensional orchid-like TiO2 nanowires (OC-TiO2 NWs) as scaffold materials to overcome the deficiencies of TiO2 NP-based structures. The perovskite precursor deeply infiltrated into the spacious pores within the OC-TiO2 NW network and crystallized in the scaffold layer, which increased the recombination resistance and charge extraction efficiency. Additionally, Ag NPs were introduced in the form of a silica-coated Ag@OC-TiO2 NW (SiO2@Ag@OC-TiO2 NW) composite to achieve still better performance through localized surface plasmon resonance (LSPR) and exciton dissociation inducement of the Ag NPs. Consequently, a PSC based on this collaborative scaffold consisting of Ag NPs and OC-TiO2 NWs exhibited a high power conversion efficiency (PCE) of 15.09%, which is an improvement of 24% over a PSC based on a TiO2 NP scaffold layer, where the average PCE was 12.17%.

Graphical abstract: Synergistic effects of three-dimensional orchid-like TiO2 nanowire networks and plasmonic nanoparticles for highly efficient mesoscopic perovskite solar cells

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Supplementary files

Article information


Submitted
09 Dec 2015
Accepted
01 Apr 2016
First published
04 Apr 2016

J. Mater. Chem. A, 2016,4, 7322-7329
Article type
Paper
Author version available

Synergistic effects of three-dimensional orchid-like TiO2 nanowire networks and plasmonic nanoparticles for highly efficient mesoscopic perovskite solar cells

H. Yu, J. Roh, J. Yun and J. Jang, J. Mater. Chem. A, 2016, 4, 7322
DOI: 10.1039/C5TA10040B

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