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Issue 48, 2014
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High voltage in hole conductor free organo metal halide perovskite solar cells

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Abstract

Organo metal halide perovskite has attracted considerable attention recently due to its distinctive properties that make it especially useful in photovoltaic solar cells. In this work we demonstrate high open circuit voltage of 1.35 V using Al2O3/CH3NH3PbBr3 perovskite solar cells without a hole conductor. The contact potential difference under light measured by surface photovoltage spectroscopy of CH3NH3PbBr3 was more than twice that of CH3NH3PbI3, which results in smaller surface potential for the Al2O3/CH3NH3PbBr3 cells. Incident modulated photovoltage spectroscopy shows a longer recombination lifetime for the Al2O3/CH3NH3PbBr3 cells than for the TiO2/CH3NH3PbI3 cells or for the TiO2/CH3NH3PbBr3 cells, further supporting the high open circuit voltage. The possibility to gain high open circuit voltage even without a hole transport material in perovskite solar cells shows that the perovskite/metal oxide interface has a major effect on the open circuit voltage in perovskite based solar cells.

Graphical abstract: High voltage in hole conductor free organo metal halide perovskite solar cells

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Supplementary files

Article information


Submitted
20 Oct 2014
Accepted
21 Oct 2014
First published
22 Oct 2014

J. Mater. Chem. A, 2014,2, 20776-20781
Article type
Paper
Author version available

High voltage in hole conductor free organo metal halide perovskite solar cells

A. Dymshits, A. Rotem and L. Etgar, J. Mater. Chem. A, 2014, 2, 20776
DOI: 10.1039/C4TA05613B

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