DOI: 10.1063/1.4919109. Non-ferroelectric nature of the conductance hysteresis in CH3NH3PbI3 perovskite-based photovoltaic devices

Non-ferroelectric nature of the conductance hysteresis in CH3NH3PbI3 perovskite-based photovoltaic devices

10.1063/1.4919109

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

We present measurements of conductance hysteresis on CH3NH3PbI3 perovskite thin films, performed using the double-wave method, in order to investigate the possibility of a ferroelectric response. A strong frequency dependence of the hysteresis is observed in the range of 0.1 Hz to 150 Hz, with a hysteretic charge density in excess of 1000 μC cm−2 at frequencies below 0.4 Hz—a behaviour uncharacteristic of a ferroelectric response. We show that the observed hysteretic conductance, as well as the presence of a double arc in the impedance spectroscopy, can be fully explained by the migration of mobile ions under bias on a timescale of seconds. Our measurements place an upper limit of ≈1 μC cm−2 on any intrinsic frequency-independent polarisation, ruling out ferroelectricity as the main cause of current-voltage hysteresis and providing further evidence of the importance of ionic migration in modifying the efficiency of CH3NH3PbI3 devices.

Bibliography

Beilsten-Edmands, J., Eperon, G. E., Johnson, R. D., Snaith, H. J., & Radaelli, P. G. (2015). Non-ferroelectric nature of the conductance hysteresis in CH3NH3PbI3 perovskite-based photovoltaic devices. Applied Physics Letters, 106(17).

Authors 5

J. Beilsten-Edmands (first)
G. E. Eperon (additional)
R. D. Johnson (additional)
H. J. Snaith (additional)
P. G. Radaelli (additional)

References 33 Referenced 193

{'year': '2015', 'key': '2023061803581688500_c1'} (2015)
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Dates

Type	When
Created	10 years, 4 months ago (April 27, 2015, 1 p.m.)
Deposited	2 years, 2 months ago (June 17, 2023, 11:58 p.m.)
Indexed	5 days, 3 hours ago (Aug. 23, 2025, 1:11 a.m.)
Issued	10 years, 4 months ago (April 27, 2015)
Published	10 years, 4 months ago (April 27, 2015)
Published Online	10 years, 4 months ago (April 27, 2015)
Published Print	10 years, 4 months ago (April 27, 2015)

Funders 1

Engineering and Physical Sciences Research Council 10.13039/501100000266
Region: Europe
gov (National government)
Labels4
1. UKRI Engineering and Physical Sciences Research Council
2. Engineering and Physical Sciences Research Council - UKRI
3. Engineering & Physical Sciences Research Council
4. EPSRC
Awards2
1. EP/J017361/1
2. EP/J003557/1

BibTeX

@article{Beilsten_Edmands_2015, title={Non-ferroelectric nature of the conductance hysteresis in CH3NH3PbI3 perovskite-based photovoltaic devices}, volume={106}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4919109}, DOI={10.1063/1.4919109}, number={17}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Beilsten-Edmands, J. and Eperon, G. E. and Johnson, R. D. and Snaith, H. J. and Radaelli, P. G.}, year={2015}, month=apr }

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