Issue 12, 2016

Null current hysteresis for acetylacetonate electron extraction layer in perovskite solar cells

Abstract

Solution processed zirconium acetylacetonate (Zr(acac)) is successfully employed as an electron extraction layer, replacing conventional titanium oxide, in planar CH3NH3PbI3 perovskite solar cells. The as-prepared Zr(acac) film possesses high transparency, high conductivity, a smooth morphology, high wettability, compatibility with PbI2 DMF solution, and an energy level matching that of CH3NH3PbI3 perovskite material. An average power conversion efficiency of about 11.93%, along with a high fill factor of 74.36%, an open circuit voltage of 1.03 V, and a short-circuit current density of 15.58 mA cm−2 is achieved. The overall performance of the devices is slight better than that of cells using ruthenium acetylacetonate (Ru(acac)). The differences between solar cells with different electron extraction layers in charge recombination, charge transport and transfer and lifetime are further explored and it is demonstrate that Zr(acac) is a more effective and promising electron extraction layer. This work provides a simple, and cost effective route for the preparation of an effective hole extraction layer.

Graphical abstract: Null current hysteresis for acetylacetonate electron extraction layer in perovskite solar cells

Article information

Article type
Paper
Submitted
10 sept. 2015
Accepted
08 oct. 2015
First published
12 oct. 2015

Nanoscale, 2016,8, 6328-6334

Null current hysteresis for acetylacetonate electron extraction layer in perovskite solar cells

Abd. R. B. Mohd Yusoff, M. A. Mat Teridi and J. Jang, Nanoscale, 2016, 8, 6328 DOI: 10.1039/C5NR06234A

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