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

74 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

Cite this

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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.",

keywords = "grain boundary properties, hysteretic properties, mesoporous perovskite solar cell, polarization, scanning probe microscopy",

author = "Kim, \{Gee Yeong\} and Oh, \{Seol Hee\} and Nguyen, \{Bich Phuong\} and William Jo and Kim, \{Byeong Jo\} and Lee, \{Dong Geon\} and Jung, \{Hyun Suk\}",

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doi = "10.1021/acs.jpclett.5b00967",

language = "English",

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AU - Kim, Gee Yeong

AU - Oh, Seol Hee

AU - Nguyen, Bich Phuong

AU - Jo, William

AU - Kim, Byeong Jo

AU - Lee, Dong Geon

AU - Jung, Hyun Suk

PY - 2015/6/18

Y1 - 2015/6/18

N2 - 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.

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.

KW - grain boundary properties

KW - hysteretic properties

KW - mesoporous perovskite solar cell

KW - polarization

KW - scanning probe microscopy

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DO - 10.1021/acs.jpclett.5b00967

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JO - Journal of Physical Chemistry Letters

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IS - 12

ER -

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

Abstract

Bibliographical note

Keywords

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