Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells

Ke Ma; Harindi R. Atapattu; Qiuchen Zhao; Yao Gao; Blake P. Finkenauer; Kang Wang; Ke Chen; So Min Park; Aidan H. Coffey; Chenhui Zhu; Libai Huang; Kenneth R. Graham; Jianguo Mei; Letian Dou

doi:10.1002/adma.202100791

Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells

Ke Ma, Harindi R. Atapattu, Qiuchen Zhao, Yao Gao, Blake P. Finkenauer, Kang Wang, Ke Chen, So Min Park, Aidan H. Coffey, Chenhui Zhu, Libai Huang, Kenneth R. Graham, Jianguo Mei, Letian Dou

Chemistry

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

86 Scopus citations

Abstract

Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light-harvesting perovskite film and the hole-transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non-radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple-cation mixed-halide medium-bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long-term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.

Original language	English
Article number	2100791
Journal	Advanced Materials
Volume	33
Issue number	32
DOIs	https://doi.org/10.1002/adma.202100791
State	Published - Aug 12 2021

Bibliographical note

Funding Information:
This work was supported by the US Office of Naval Research (award no. N00014‐19‐1‐2296 to L.D.; program managers: J. Parker and P. Armistead), the Davidson School of Chemical Engineering, and College of Engineering of Purdue University. K.M. acknowledges the support from the Lillian Gilbreth Postdoctoral Fellowship from College of Engineering of Purdue University. L.H. acknowledges the support from US Department of Energy, Office of Basic Energy Sciences through award no. DE‐SC0016356. H.R.A., S.M.P., and K.R.G. acknowledge the U.S. Department of Energy under Grant DE‐SC0018208 for supporting the UPS, IPES, and XPS measurements. The authors thank A. Liang and Z. Wei for help with materials synthesis and B. W. Boudouris for help with electrochemical impedance spectrometry measurements.

Publisher Copyright:
© 2021 Wiley-VCH GmbH

Keywords

charge transfer
organic semiconductors
perovskite solar cells
stability
surface passivation

ASJC Scopus subject areas

Materials Science (all)
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/adma.202100791

Cite this

@article{f13ad72e69e74d65a13a919f75a71413,

title = "Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells",

abstract = "Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light-harvesting perovskite film and the hole-transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non-radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple-cation mixed-halide medium-bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long-term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.",

keywords = "charge transfer, organic semiconductors, perovskite solar cells, stability, surface passivation",

author = "Ke Ma and Atapattu, {Harindi R.} and Qiuchen Zhao and Yao Gao and Finkenauer, {Blake P.} and Kang Wang and Ke Chen and Park, {So Min} and Coffey, {Aidan H.} and Chenhui Zhu and Libai Huang and Graham, {Kenneth R.} and Jianguo Mei and Letian Dou",

note = "Funding Information: This work was supported by the US Office of Naval Research (award no. N00014‐19‐1‐2296 to L.D.; program managers: J. Parker and P. Armistead), the Davidson School of Chemical Engineering, and College of Engineering of Purdue University. K.M. acknowledges the support from the Lillian Gilbreth Postdoctoral Fellowship from College of Engineering of Purdue University. L.H. acknowledges the support from US Department of Energy, Office of Basic Energy Sciences through award no. DE‐SC0016356. H.R.A., S.M.P., and K.R.G. acknowledge the U.S. Department of Energy under Grant DE‐SC0018208 for supporting the UPS, IPES, and XPS measurements. The authors thank A. Liang and Z. Wei for help with materials synthesis and B. W. Boudouris for help with electrochemical impedance spectrometry measurements. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

year = "2021",

month = aug,

day = "12",

doi = "10.1002/adma.202100791",

language = "English",

volume = "33",

number = "32",

}

TY - JOUR

T1 - Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells

AU - Ma, Ke

AU - Atapattu, Harindi R.

AU - Zhao, Qiuchen

AU - Gao, Yao

AU - Finkenauer, Blake P.

AU - Wang, Kang

AU - Chen, Ke

AU - Park, So Min

AU - Coffey, Aidan H.

AU - Zhu, Chenhui

AU - Huang, Libai

AU - Graham, Kenneth R.

AU - Mei, Jianguo

AU - Dou, Letian

N1 - Funding Information: This work was supported by the US Office of Naval Research (award no. N00014‐19‐1‐2296 to L.D.; program managers: J. Parker and P. Armistead), the Davidson School of Chemical Engineering, and College of Engineering of Purdue University. K.M. acknowledges the support from the Lillian Gilbreth Postdoctoral Fellowship from College of Engineering of Purdue University. L.H. acknowledges the support from US Department of Energy, Office of Basic Energy Sciences through award no. DE‐SC0016356. H.R.A., S.M.P., and K.R.G. acknowledge the U.S. Department of Energy under Grant DE‐SC0018208 for supporting the UPS, IPES, and XPS measurements. The authors thank A. Liang and Z. Wei for help with materials synthesis and B. W. Boudouris for help with electrochemical impedance spectrometry measurements. Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/8/12

Y1 - 2021/8/12

N2 - Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light-harvesting perovskite film and the hole-transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non-radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple-cation mixed-halide medium-bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long-term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.

AB - Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light-harvesting perovskite film and the hole-transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non-radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple-cation mixed-halide medium-bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long-term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.

KW - charge transfer

KW - organic semiconductors

KW - perovskite solar cells

KW - stability

KW - surface passivation

UR - http://www.scopus.com/inward/record.url?scp=85109180951&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85109180951&partnerID=8YFLogxK

U2 - 10.1002/adma.202100791

DO - 10.1002/adma.202100791

M3 - Article

C2 - 34219297

AN - SCOPUS:85109180951

SN - 0935-9648

VL - 33

JO - Advanced Materials

JF - Advanced Materials

IS - 32

M1 - 2100791

ER -

Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this