Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1                             −                             xFAxPbI3 quantum dot solar cells with reduced phase segregation

Mengmeng Hao; Yang Bai; Stefan Zeiske; Long Ren; Junxian Liu; Yongbo Yuan; Nasim Zarrabi; Ningyan Cheng; Mehri Ghasemi; Peng Chen; Miaoqiang Lyu; Dongxu He; Jung Ho Yun; Yi Du; Yun Wang; Shanshan Ding; Ardalan Armin; Paul Meredith; Gang Liu; Hui Ming Cheng; Lianzhou Wang

doi:10.1038/s41560-019-0535-7

Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs₁ ₋ _xFA_xPbI₃ quantum dot solar cells with reduced phase segregation

Mengmeng Hao
, Yang Bai^*
, Stefan Zeiske
, Long Ren
, Junxian Liu
, Yongbo Yuan
, Nasim Zarrabi
, Ningyan Cheng
, Mehri Ghasemi
, Peng Chen
, Miaoqiang Lyu
, Dongxu He
, Jung Ho Yun
, Yi Du
, Yun Wang
, Shanshan Ding
, Ardalan Armin
, Paul Meredith
, Gang Liu
, Hui Ming Cheng

Lianzhou Wang

^*Corresponding author for this work

University of Queensland
Swansea University
University of Wollongong
Griffith University Queensland
School of Physics
CAS - Institute of Metal Research
University of Science and Technology of China
Tsinghua University
University of Surrey

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

542 Scopus citations

Abstract

The mixed caesium and formamidinium lead triiodide perovskite system (Cs₁ ₋ _xFA_xPbI₃) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs₁ ₋ _xFA_xPbI₃ QDs across the whole composition range (x = 0–1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs₁ ₋ _xFA_xPbI₃ QDs with reduced defect density. The hero Cs_0.5FA_0.5PbI₃ QDSC achieves a certified record power conversion efficiency (PCE) of 16.6% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94% of the original PCE under continuous 1-sun illumination for 600 h.

Original language	English
Pages (from-to)	79-88
Number of pages	10
Journal	Nature Energy
Volume	5
Issue number	1
DOIs	https://doi.org/10.1038/s41560-019-0535-7
State	Published - 1 Jan 2020
Externally published	Yes

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SDG 7 Affordable and Clean Energy

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10.1038/s41560-019-0535-7

Cite this

Hao, M., Bai, Y., Zeiske, S., Ren, L., Liu, J., Yuan, Y., Zarrabi, N., Cheng, N., Ghasemi, M., Chen, P., Lyu, M., He, D., Yun, J. H., Du, Y., Wang, Y., Ding, S., Armin, A., Meredith, P., Liu, G., ... Wang, L. (2020). Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs₁ ₋ _xFA_xPbI₃ quantum dot solar cells with reduced phase segregation. Nature Energy, 5(1), 79-88. https://doi.org/10.1038/s41560-019-0535-7

@article{fb66be1af25744ab87b1aaa37da690b2,

title = "Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1 − xFAxPbI3 quantum dot solar cells with reduced phase segregation",

abstract = "The mixed caesium and formamidinium lead triiodide perovskite system (Cs1 − xFAxPbI3) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs1 − xFAxPbI3 QDs across the whole composition range (x = 0–1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs1 − xFAxPbI3 QDs with reduced defect density. The hero Cs0.5FA0.5PbI3 QDSC achieves a certified record power conversion efficiency (PCE) of 16.6\% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94\% of the original PCE under continuous 1-sun illumination for 600 h.",

author = "Mengmeng Hao and Yang Bai and Stefan Zeiske and Long Ren and Junxian Liu and Yongbo Yuan and Nasim Zarrabi and Ningyan Cheng and Mehri Ghasemi and Peng Chen and Miaoqiang Lyu and Dongxu He and Yun, \{Jung Ho\} and Yi Du and Yun Wang and Shanshan Ding and Ardalan Armin and Paul Meredith and Gang Liu and Cheng, \{Hui Ming\} and Lianzhou Wang",

note = "Publisher Copyright: {\textcopyright} 2020, The Author(s), under exclusive licence to Springer Nature Limited.",

year = "2020",

month = jan,

day = "1",

doi = "10.1038/s41560-019-0535-7",

language = "英语",

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Hao, M, Bai, Y, Zeiske, S, Ren, L, Liu, J, Yuan, Y, Zarrabi, N, Cheng, N, Ghasemi, M, Chen, P, Lyu, M, He, D, Yun, JH, Du, Y, Wang, Y, Ding, S, Armin, A, Meredith, P, Liu, G, Cheng, HM & Wang, L 2020, 'Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs₁ ₋ _xFA_xPbI₃ quantum dot solar cells with reduced phase segregation', Nature Energy, vol. 5, no. 1, pp. 79-88. https://doi.org/10.1038/s41560-019-0535-7

Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs₁ ₋ _xFA_xPbI₃ quantum dot solar cells with reduced phase segregation. / Hao, Mengmeng; Bai, Yang; Zeiske, Stefan et al.
In: Nature Energy, Vol. 5, No. 1, 01.01.2020, p. 79-88.

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

TY - JOUR

T1 - Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1 − xFAxPbI3 quantum dot solar cells with reduced phase segregation

AU - Hao, Mengmeng

AU - Bai, Yang

AU - Zeiske, Stefan

AU - Ren, Long

AU - Liu, Junxian

AU - Yuan, Yongbo

AU - Zarrabi, Nasim

AU - Cheng, Ningyan

AU - Ghasemi, Mehri

AU - Chen, Peng

AU - Lyu, Miaoqiang

AU - He, Dongxu

AU - Yun, Jung Ho

AU - Du, Yi

AU - Wang, Yun

AU - Ding, Shanshan

AU - Armin, Ardalan

AU - Meredith, Paul

AU - Liu, Gang

AU - Cheng, Hui Ming

AU - Wang, Lianzhou

PY - 2020/1/1

Y1 - 2020/1/1

N2 - The mixed caesium and formamidinium lead triiodide perovskite system (Cs1 − xFAxPbI3) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs1 − xFAxPbI3 QDs across the whole composition range (x = 0–1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs1 − xFAxPbI3 QDs with reduced defect density. The hero Cs0.5FA0.5PbI3 QDSC achieves a certified record power conversion efficiency (PCE) of 16.6% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94% of the original PCE under continuous 1-sun illumination for 600 h.

AB - The mixed caesium and formamidinium lead triiodide perovskite system (Cs1 − xFAxPbI3) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs1 − xFAxPbI3 QDs across the whole composition range (x = 0–1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs1 − xFAxPbI3 QDs with reduced defect density. The hero Cs0.5FA0.5PbI3 QDSC achieves a certified record power conversion efficiency (PCE) of 16.6% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94% of the original PCE under continuous 1-sun illumination for 600 h.

UR - https://www.scopus.com/pages/publications/85078237247

U2 - 10.1038/s41560-019-0535-7

DO - 10.1038/s41560-019-0535-7

M3 - 文章

AN - SCOPUS:85078237247

SN - 2058-7546

VL - 5

SP - 79

EP - 88

JO - Nature Energy

JF - Nature Energy

IS - 1

ER -

Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs₁ ₋ _xFA_xPbI₃ quantum dot solar cells with reduced phase segregation

Abstract

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