Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Yuanyuan Zhang; Yongchao Ma; Insoo Shin; Yun Kyung Jung; Bo Ram Lee; Sangwook Wu; Jung Hyun Jeong; Byoung Hoon Lee; Joo Hyun Kim; Kwang Ho Kim; Sung Heum Park

doi:10.1021/acsami.9b19691

Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Yuanyuan Zhang, Yongchao Ma, Insoo Shin, Yun Kyung Jung, Bo Ram Lee, Sangwook Wu, Jung Hyun Jeong, Byoung Hoon Lee, Joo Hyun Kim, Kwang Ho Kim, Sung Heum Park

Department of Chemical Engineering & Materials Science

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

21 Scopus citations

Abstract

High power conversion efficiency (PCE) and long-Term stability are inevitable issues faced in practical device applications of perovskite solar cells. In this paper, significant enhancements in the device efficiency and stability are achieved by using a surface-Active lead acetate (Pb(OAc)₂) at the top or bottom of CH₃NH₃PbI₃ (MAPbI₃)-based perovskite. When a saturated Pb(OAc)₂ solution is introduced on the top of the MAPbI₃ perovskite precursor, the OAc^- in Pb(OAc)₂ participates in lattice restructuring of MAPbI₃ to form MAPbI_3-x(OAc)_x, thereby producing a high-quality perovskite film with high crystallinity, large grain sizes, and uniform and pinhole-free morphology. Moreover, when Pb(OAc)₂ solution is mixed in the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) solution in the bottom way, the OAc^- in Pb(OAc)₂ improves the water resistance of PEDOT-PSS. As the OAc^- easily bonds with the Pb²⁺, the deposition of MAPbI₃ precursor onto the Pb(OAc)₂ mixed with PEDOT-PSS results in a reduction of the uncoordinated Pb, leading to strong stabilization of the perovskite layer. Both the top-and bottom-Treated devices exhibit enhanced PCE values of 18.93% and 18.28%, respectively, compared to the conventional device with a PCE of 16.47%, which originates from decreased trap sites and reduced energy barriers. In particular, the bottom-Treated device exhibits long-Term stability, with more than 84% of its initial PCE over 800 h in an ambient environment.

Original language	English
Pages (from-to)	7186-7197
Number of pages	12
Journal	ACS Applied Materials and Interfaces
Volume	12
Issue number	6
DOIs	https://doi.org/10.1021/acsami.9b19691
State	Published - 12 Feb 2020

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Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

Pb(OAc)
high efficiency
long-Term stability
perovskite solar cells
top and bottom ways

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10.1021/acsami.9b19691

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title = "Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells",

abstract = "High power conversion efficiency (PCE) and long-Term stability are inevitable issues faced in practical device applications of perovskite solar cells. In this paper, significant enhancements in the device efficiency and stability are achieved by using a surface-Active lead acetate (Pb(OAc)2) at the top or bottom of CH3NH3PbI3 (MAPbI3)-based perovskite. When a saturated Pb(OAc)2 solution is introduced on the top of the MAPbI3 perovskite precursor, the OAc- in Pb(OAc)2 participates in lattice restructuring of MAPbI3 to form MAPbI3-x(OAc)x, thereby producing a high-quality perovskite film with high crystallinity, large grain sizes, and uniform and pinhole-free morphology. Moreover, when Pb(OAc)2 solution is mixed in the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) solution in the bottom way, the OAc- in Pb(OAc)2 improves the water resistance of PEDOT-PSS. As the OAc- easily bonds with the Pb2+, the deposition of MAPbI3 precursor onto the Pb(OAc)2 mixed with PEDOT-PSS results in a reduction of the uncoordinated Pb, leading to strong stabilization of the perovskite layer. Both the top-and bottom-Treated devices exhibit enhanced PCE values of 18.93% and 18.28%, respectively, compared to the conventional device with a PCE of 16.47%, which originates from decreased trap sites and reduced energy barriers. In particular, the bottom-Treated device exhibits long-Term stability, with more than 84% of its initial PCE over 800 h in an ambient environment.",

keywords = "Pb(OAc), high efficiency, long-Term stability, perovskite solar cells, top and bottom ways",

author = "Yuanyuan Zhang and Yongchao Ma and Insoo Shin and Jung, {Yun Kyung} and Lee, {Bo Ram} and Sangwook Wu and Jeong, {Jung Hyun} and Lee, {Byoung Hoon} and Kim, {Joo Hyun} and Kim, {Kwang Ho} and Park, {Sung Heum}",

note = "Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = feb,

day = "12",

doi = "10.1021/acsami.9b19691",

language = "English",

volume = "12",

pages = "7186--7197",

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publisher = "American Chemical Society",

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T1 - Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

AU - Zhang, Yuanyuan

AU - Ma, Yongchao

AU - Shin, Insoo

AU - Jung, Yun Kyung

AU - Lee, Bo Ram

AU - Wu, Sangwook

AU - Jeong, Jung Hyun

AU - Lee, Byoung Hoon

AU - Kim, Joo Hyun

AU - Kim, Kwang Ho

AU - Park, Sung Heum

PY - 2020/2/12

Y1 - 2020/2/12

N2 - High power conversion efficiency (PCE) and long-Term stability are inevitable issues faced in practical device applications of perovskite solar cells. In this paper, significant enhancements in the device efficiency and stability are achieved by using a surface-Active lead acetate (Pb(OAc)2) at the top or bottom of CH3NH3PbI3 (MAPbI3)-based perovskite. When a saturated Pb(OAc)2 solution is introduced on the top of the MAPbI3 perovskite precursor, the OAc- in Pb(OAc)2 participates in lattice restructuring of MAPbI3 to form MAPbI3-x(OAc)x, thereby producing a high-quality perovskite film with high crystallinity, large grain sizes, and uniform and pinhole-free morphology. Moreover, when Pb(OAc)2 solution is mixed in the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) solution in the bottom way, the OAc- in Pb(OAc)2 improves the water resistance of PEDOT-PSS. As the OAc- easily bonds with the Pb2+, the deposition of MAPbI3 precursor onto the Pb(OAc)2 mixed with PEDOT-PSS results in a reduction of the uncoordinated Pb, leading to strong stabilization of the perovskite layer. Both the top-and bottom-Treated devices exhibit enhanced PCE values of 18.93% and 18.28%, respectively, compared to the conventional device with a PCE of 16.47%, which originates from decreased trap sites and reduced energy barriers. In particular, the bottom-Treated device exhibits long-Term stability, with more than 84% of its initial PCE over 800 h in an ambient environment.

AB - High power conversion efficiency (PCE) and long-Term stability are inevitable issues faced in practical device applications of perovskite solar cells. In this paper, significant enhancements in the device efficiency and stability are achieved by using a surface-Active lead acetate (Pb(OAc)2) at the top or bottom of CH3NH3PbI3 (MAPbI3)-based perovskite. When a saturated Pb(OAc)2 solution is introduced on the top of the MAPbI3 perovskite precursor, the OAc- in Pb(OAc)2 participates in lattice restructuring of MAPbI3 to form MAPbI3-x(OAc)x, thereby producing a high-quality perovskite film with high crystallinity, large grain sizes, and uniform and pinhole-free morphology. Moreover, when Pb(OAc)2 solution is mixed in the poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) solution in the bottom way, the OAc- in Pb(OAc)2 improves the water resistance of PEDOT-PSS. As the OAc- easily bonds with the Pb2+, the deposition of MAPbI3 precursor onto the Pb(OAc)2 mixed with PEDOT-PSS results in a reduction of the uncoordinated Pb, leading to strong stabilization of the perovskite layer. Both the top-and bottom-Treated devices exhibit enhanced PCE values of 18.93% and 18.28%, respectively, compared to the conventional device with a PCE of 16.47%, which originates from decreased trap sites and reduced energy barriers. In particular, the bottom-Treated device exhibits long-Term stability, with more than 84% of its initial PCE over 800 h in an ambient environment.

KW - Pb(OAc)

KW - high efficiency

KW - long-Term stability

KW - perovskite solar cells

KW - top and bottom ways

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U2 - 10.1021/acsami.9b19691

DO - 10.1021/acsami.9b19691

M3 - Article

C2 - 31944647

AN - SCOPUS:85079351899

SN - 1944-8244

VL - 12

SP - 7186

EP - 7197

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 6

ER -

Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Abstract

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Keywords

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