Efficient carrier separation and intriguing switching of bound charges in inorganic-organic lead halide solar cells

Gee Yeong Kim; Seol Hee Oh; Bich Phuong Nguyen; William Jo; Byeong Jo Kim; Dong Geon Lee; Hyun Suk Jung

doi:10.1021/acs.jpclett.5b00967

Efficient carrier separation and intriguing switching of bound charges in inorganic-organic lead halide solar cells

Gee Yeong Kim, Seol Hee Oh, Bich Phuong Nguyen, William Jo, Byeong Jo Kim, Dong Geon Lee, Hyun Suk Jung

Department of Physics

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

We fabricated a mesoporous perovskite solar cell with a ∼14% conversion efficiency, and we investigated its beneficial grain boundary properties of the perovskite solar cells through the use of scanning probe microscopy. The CH₃NH₃Pb(I_0.88,Br_0.12)₃ showed a significant potential barrier bending at the grain boundary and induced passivation. The potential difference value in the x = 0.00 sample is ∼50 mV, and the distribution of the positive potential is lower than that of the x = 0.12 sample. We also investigated the polarization and hysteretic properties of the perovskite thin films by measuring the local piezoresponse. Specifically, the charged grain boundaries play a beneficial role in electron-hole depairing and in suppressing recombination in order to realize high-efficiency perovskite solar cells.

Original language	English
Pages (from-to)	2355-2362
Number of pages	8
Journal	Journal of Physical Chemistry Letters
Volume	6
Issue number	12
DOIs	https://doi.org/10.1021/acs.jpclett.5b00967
State	Published - 18 Jun 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

Keywords

grain boundary properties
hysteretic properties
mesoporous perovskite solar cell
polarization
scanning probe microscopy

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10.1021/acs.jpclett.5b00967

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title = "Efficient carrier separation and intriguing switching of bound charges in inorganic-organic lead halide solar cells",

abstract = "We fabricated a mesoporous perovskite solar cell with a ∼14% conversion efficiency, and we investigated its beneficial grain boundary properties of the perovskite solar cells through the use of scanning probe microscopy. The CH3NH3Pb(I0.88,Br0.12)3 showed a significant potential barrier bending at the grain boundary and induced passivation. The potential difference value in the x = 0.00 sample is ∼50 mV, and the distribution of the positive potential is lower than that of the x = 0.12 sample. We also investigated the polarization and hysteretic properties of the perovskite thin films by measuring the local piezoresponse. Specifically, the charged grain boundaries play a beneficial role in electron-hole depairing and in suppressing recombination in order to realize high-efficiency perovskite solar cells.",

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AU - Nguyen, Bich Phuong

AU - Jo, William

AU - Kim, Byeong Jo

AU - Lee, Dong Geon

AU - Jung, Hyun Suk

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AB - We fabricated a mesoporous perovskite solar cell with a ∼14% conversion efficiency, and we investigated its beneficial grain boundary properties of the perovskite solar cells through the use of scanning probe microscopy. The CH3NH3Pb(I0.88,Br0.12)3 showed a significant potential barrier bending at the grain boundary and induced passivation. The potential difference value in the x = 0.00 sample is ∼50 mV, and the distribution of the positive potential is lower than that of the x = 0.12 sample. We also investigated the polarization and hysteretic properties of the perovskite thin films by measuring the local piezoresponse. Specifically, the charged grain boundaries play a beneficial role in electron-hole depairing and in suppressing recombination in order to realize high-efficiency perovskite solar cells.

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KW - polarization

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Efficient carrier separation and intriguing switching of bound charges in inorganic-organic lead halide solar cells

Abstract

Bibliographical note

Keywords

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