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Issue 10, 2018
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Higher efficiency perovskite solar cells using Au@SiO2 core–shell nanoparticles

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Abstract

In this work, we improved photovoltaic performance by about 27% in planar p-i-n perovskite solar cells (PSCs) using plasmonic Au@SiO2 core–shell nanoparticles (NPs). The devices have an architecture of ITO glass/PEDOT:PSS/perovskite(CH3NH3PbI3)/PCBM/Rhodamine/Ag. Four batches of devices were fabricated with different concentrations of Au@SiO2 NPs ranging from 0.4 to 1.6 wt% with an interval of 0.4 wt%. The Au@SiO2 NPs were integrated at the interface between the PEDOT:PSS layer and the active perovskite layer. At an optimized concentration of 1.2 wt% Au@SiO2 NPs, the PSCs achieved 25.1% of enhancement in photocurrent from 17.45 to 22.35 mA cm−2 and an improvement of 27.3% in power conversion efficiency (PCE) from 11.44 to 14.57%. This significant improvement in device performance is attributed to the localized surface plasmon resonance (LSPR) of Au@SiO2 NPs, which enhanced the light absorption in the active perovskite layer. The transient photocurrent and photovoltage measurements revealed that PSCs with Au@SiO2 NPs have a faster charge transport time and longer recombination lifetime than those without Au@SiO2 NPs. These results demonstrate that plasmonic metal nanoparticles substantially improved the efficiency of PSCs.

Graphical abstract: Higher efficiency perovskite solar cells using Au@SiO2 core–shell nanoparticles

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Article information


Submitted
16 Mar 2018
Accepted
14 Jul 2018
First published
16 Jul 2018

Sustainable Energy Fuels, 2018,2, 2260-2267
Article type
Paper
Author version available

Higher efficiency perovskite solar cells using Au@SiO2 core–shell nanoparticles

P. S. Chandrasekhar, A. Dubey, K. M. Reza, M. D. N. Hasan, B. Bahrami, V. K. Komarala, J. D. Hoefelmeyer, Q. He, F. Wu, H. Qiao, W. Zhang and Q. Qiao, Sustainable Energy Fuels, 2018, 2, 2260
DOI: 10.1039/C7SE00472A

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