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Issue 9, 2015
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Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

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Abstract

We describe a fast, simple and low temperature electrochemical technique for the preparation of zinc oxide layers on rigid and flexible substrates. The layers, prepared from a zinc nitrate precursor, are of high structural and optical quality. They have been optimized to be applied as efficient electron transport layers in CH3NH3PbI3-sensitized perovskite solar cells (PSCs). We show that an electrodeposition time of only two minutes and a low processing temperature are sufficient to fabricate solar cells with a power conversion efficiency close to 11%, with a high short circuit current and a small JV curve hysteresis. The key parameters of the cell functioning have been analyzed over a large applied voltage range by the impedance spectroscopy technique. The solar cell characteristic changes with the ZnO layer deposition time are explained by the variation of the recombination and charge transfer resistances.

Graphical abstract: Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

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Article information


Submitted
24 Nov 2014
Accepted
19 Jan 2015
First published
20 Jan 2015

J. Mater. Chem. A, 2015,3, 4909-4915
Article type
Paper
Author version available

Fast and low temperature growth of electron transport layers for efficient perovskite solar cells

J. Zhang, E. J. Juárez-Pérez, I. Mora-Seró, B. Viana and T. Pauporté, J. Mater. Chem. A, 2015, 3, 4909
DOI: 10.1039/C4TA06416J

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