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Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells

Juarez-Perez, Emilio J., Sanchez, Rafael S., Badia, Laura, Garcia-Belmonte, Germá, Kang, Yong Soo, Mora-Sero, Ivan, Bisquert, Juan·2014·The Journal of Physical Chemistry Letters

Abstract

Organic-inorganic lead trihalide perovskites have emerged as an outstanding photovoltaic material that demonstrated a high 17.9% conversion efficiency of sunlight to electricity in a short time. We have found a giant dielectric constant (GDC) phenomenon in these materials consisting on a low frequency dielectric constant in the dark of the order of ε0 = 1000. We also found an unprecedented behavior in which ε0 further increases under illumination or by charge injection at applied bias. We observe that ε0 increases nearly linearly with the illumination intensity up to an additional factor 1000 under 1 sun. Measurement of a variety of samples of different morphologies, compositions, and different types of contacts shows that the GDC is an intrinsic property of MAPbX3 (MA = CH3NH3(+)). We hypothesize that the large dielectric response is induced by structural fluctuations. Photoinduced carriers modify the local unit cell equilibrium and change the polarizability, assisted by the freedom of rotation of MA. The study opens a way for the understanding of a key aspect of the photovoltaic operation of high efficiency perovskite solar cells.

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Metadata

Authors
Juarez-Perez, E. J., Sanchez, R. S., Badia, L., Garcia-Belmonte, G., Kang, Y. S., Mora-Sero, I., & Bisquert, J.
Venue
The Journal of Physical Chemistry Letters
Published
2014-06-24
Volume
5
Issue
13
Pages
2390-2394
ISSN
1948-7185 (ISSN-L)
OpenAlex
W2322944840
Cited by
744
References
1
FWCI
50.59
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells. https://app.cochat.ai/papers/10.1021/jz5011169
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Juarez-Perez, E. J., Sanchez, R. S., Badia, L., Garcia-Belmonte, G., Kang, Y. S., Mora-Sero, I., & Bisquert, J. (2014). Photoinduced Giant Dielectric Constant in Lead Halide Perovskite Solar Cells. The Journal of Physical Chemistry Letters. https://doi.org/10.1021/jz5011169

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