Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells

Bich Phuong Nguyen; Hye Ri Jung; Ka Yeon Ryu; Kyungkon Kim; William Jo

doi:10.1021/acs.jpcc.9b08859

Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI₃ Solar Cells

Bich Phuong Nguyen, Hye Ri Jung, Ka Yeon Ryu, Kyungkon Kim, William Jo

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

8 Scopus citations

Abstract

Charge extraction at carrier transport layers adjacent to perovskites is crucial for the optimization of perovskite solar cells. In particular, Sn-perovskites with no lead elements are known to struggle from charge extraction. Here, we report the effects of organic ligands such as FA and MA (FA = HC(NH₂)₂ ⁺ MA = CH₃NH₃ ⁺) on charge separation at the interface between electron transport layers and perovskites. TiO₂ mesoporous covering the tin-perovskites show significant changes in the electronic structure and built-in potentials according to the ratio of FA to MA. Through a local probe with potential and current mapping, charge transport has been intensively examined. The best cell in this study is obtained as 5.37% at FA/MA = 3:1 with only iodine at the halide sites. Even though the value itself is not comparable with lead halides, it could pave a new direction to improve lead-free perovskite solar cells.

Original language	English
Pages (from-to)	30833-30841
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	51
DOIs	https://doi.org/10.1021/acs.jpcc.9b08859
State	Published - 26 Dec 2019

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@article{94cd95059abf4b999de6fe6582582415,

title = "Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells",

abstract = "Charge extraction at carrier transport layers adjacent to perovskites is crucial for the optimization of perovskite solar cells. In particular, Sn-perovskites with no lead elements are known to struggle from charge extraction. Here, we report the effects of organic ligands such as FA and MA (FA = HC(NH2)2 + MA = CH3NH3 +) on charge separation at the interface between electron transport layers and perovskites. TiO2 mesoporous covering the tin-perovskites show significant changes in the electronic structure and built-in potentials according to the ratio of FA to MA. Through a local probe with potential and current mapping, charge transport has been intensively examined. The best cell in this study is obtained as 5.37% at FA/MA = 3:1 with only iodine at the halide sites. Even though the value itself is not comparable with lead halides, it could pave a new direction to improve lead-free perovskite solar cells.",

author = "Nguyen, {Bich Phuong} and Jung, {Hye Ri} and Ryu, {Ka Yeon} and Kyungkon Kim and William Jo",

note = "Funding Information: This research was supported by the NRF Basic Science Research Program funded by the Ministry of Science, Technology and ICT (grant NRF-2018R1A2B2003607) and the Ministry of Education (NRF-2018R1A6A1A03025340), Republic of Korea. In particular, W.J. acknowledges that this work was also supported by the Ewha Womans University research grant of 2019. Publisher Copyright: Copyright {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = dec,

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doi = "10.1021/acs.jpcc.9b08859",

language = "English",

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T1 - Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells

AU - Nguyen, Bich Phuong

AU - Jung, Hye Ri

AU - Ryu, Ka Yeon

AU - Kim, Kyungkon

AU - Jo, William

N1 - Funding Information: This research was supported by the NRF Basic Science Research Program funded by the Ministry of Science, Technology and ICT (grant NRF-2018R1A2B2003607) and the Ministry of Education (NRF-2018R1A6A1A03025340), Republic of Korea. In particular, W.J. acknowledges that this work was also supported by the Ewha Womans University research grant of 2019. Publisher Copyright: Copyright © 2019 American Chemical Society.

PY - 2019/12/26

Y1 - 2019/12/26

N2 - Charge extraction at carrier transport layers adjacent to perovskites is crucial for the optimization of perovskite solar cells. In particular, Sn-perovskites with no lead elements are known to struggle from charge extraction. Here, we report the effects of organic ligands such as FA and MA (FA = HC(NH2)2 + MA = CH3NH3 +) on charge separation at the interface between electron transport layers and perovskites. TiO2 mesoporous covering the tin-perovskites show significant changes in the electronic structure and built-in potentials according to the ratio of FA to MA. Through a local probe with potential and current mapping, charge transport has been intensively examined. The best cell in this study is obtained as 5.37% at FA/MA = 3:1 with only iodine at the halide sites. Even though the value itself is not comparable with lead halides, it could pave a new direction to improve lead-free perovskite solar cells.

AB - Charge extraction at carrier transport layers adjacent to perovskites is crucial for the optimization of perovskite solar cells. In particular, Sn-perovskites with no lead elements are known to struggle from charge extraction. Here, we report the effects of organic ligands such as FA and MA (FA = HC(NH2)2 + MA = CH3NH3 +) on charge separation at the interface between electron transport layers and perovskites. TiO2 mesoporous covering the tin-perovskites show significant changes in the electronic structure and built-in potentials according to the ratio of FA to MA. Through a local probe with potential and current mapping, charge transport has been intensively examined. The best cell in this study is obtained as 5.37% at FA/MA = 3:1 with only iodine at the halide sites. Even though the value itself is not comparable with lead halides, it could pave a new direction to improve lead-free perovskite solar cells.

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Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells

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Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI₃ Solar Cells