Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability

Fei Zhang; Wenda Shi; Jingshan Luo; Norman Pellet; Chenyi Yi; Xiong Li; Xiaoming Zhao; T. John S. Dennis; Xianggao Li; Shirong Wang; Yin Xiao; Shaik Mohammed Zakeeruddin; Dongqin Bi; Michael Grätzel

doi:10.1002/adma.201606806

Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability

Fei Zhang, Wenda Shi, Jingshan Luo, Norman Pellet, Chenyi Yi, Xiong Li, Xiaoming Zhao, T. John S. Dennis^*, Xianggao Li, Shirong Wang, Yin Xiao, Shaik Mohammed Zakeeruddin, Dongqin Bi, Michael Grätzel

^*Corresponding author for this work

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

367 Citations (Scopus)

Abstract

A fullerene derivative (α-bis-PCBM) is purified from an as-produced bis-phenyl-C₆₁-butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and is employed as a templating agent for solution processing of metal halide perovskite films via an antisolvent method. The resulting α-bis-PCBM-containing perovskite solar cells achieve better stability, efficiency, and reproducibility when compared with analogous cells containing PCBM. α-bis-PCBM fills the vacancies and grain boundaries of the perovskite film, enhancing the crystallization of perovskites and addressing the issue of slow electron extraction. In addition, α-bis-PCBM resists the ingression of moisture and passivates voids or pinholes generated in the hole-transporting layer. As a result, a power conversion efficiency (PCE) of 20.8% is obtained, compared with 19.9% by PCBM, and is accompanied by excellent stability under heat and simulated sunlight. The PCE of unsealed devices dropped by less than 10% in ambient air (40% RH) after 44 d at 65 °C, and by 4% after 600 h under continuous full-sun illumination and maximum power point tracking, respectively.

Original language	English
Article number	1606806
Journal	Advanced Materials
Volume	29
Issue number	17
DOIs	https://doi.org/10.1002/adma.201606806
Publication status	Published - 3 May 2017
Externally published	Yes

Keywords

bis-PCBM
perovskites
solar cells
stabilities

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10.1002/adma.201606806

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Zhang, F., Shi, W., Luo, J., Pellet, N., Yi, C., Li, X., Zhao, X., Dennis, T. J. S., Li, X., Wang, S., Xiao, Y., Zakeeruddin, S. M., Bi, D., & Grätzel, M. (2017). Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability. Advanced Materials, 29(17), Article 1606806. https://doi.org/10.1002/adma.201606806

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abstract = "A fullerene derivative (α-bis-PCBM) is purified from an as-produced bis-phenyl-C61-butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and is employed as a templating agent for solution processing of metal halide perovskite films via an antisolvent method. The resulting α-bis-PCBM-containing perovskite solar cells achieve better stability, efficiency, and reproducibility when compared with analogous cells containing PCBM. α-bis-PCBM fills the vacancies and grain boundaries of the perovskite film, enhancing the crystallization of perovskites and addressing the issue of slow electron extraction. In addition, α-bis-PCBM resists the ingression of moisture and passivates voids or pinholes generated in the hole-transporting layer. As a result, a power conversion efficiency (PCE) of 20.8% is obtained, compared with 19.9% by PCBM, and is accompanied by excellent stability under heat and simulated sunlight. The PCE of unsealed devices dropped by less than 10% in ambient air (40% RH) after 44 d at 65 °C, and by 4% after 600 h under continuous full-sun illumination and maximum power point tracking, respectively.",

keywords = "bis-PCBM, perovskites, solar cells, stabilities",

author = "Fei Zhang and Wenda Shi and Jingshan Luo and Norman Pellet and Chenyi Yi and Xiong Li and Xiaoming Zhao and Dennis, {T. John S.} and Xianggao Li and Shirong Wang and Yin Xiao and Zakeeruddin, {Shaik Mohammed} and Dongqin Bi and Michael Gr{\"a}tzel",

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year = "2017",

month = may,

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doi = "10.1002/adma.201606806",

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AU - Zhang, Fei

AU - Shi, Wenda

AU - Luo, Jingshan

AU - Pellet, Norman

AU - Yi, Chenyi

AU - Li, Xiong

AU - Zhao, Xiaoming

AU - Dennis, T. John S.

AU - Li, Xianggao

AU - Wang, Shirong

AU - Xiao, Yin

AU - Zakeeruddin, Shaik Mohammed

AU - Bi, Dongqin

AU - Grätzel, Michael

PY - 2017/5/3

Y1 - 2017/5/3

N2 - A fullerene derivative (α-bis-PCBM) is purified from an as-produced bis-phenyl-C61-butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and is employed as a templating agent for solution processing of metal halide perovskite films via an antisolvent method. The resulting α-bis-PCBM-containing perovskite solar cells achieve better stability, efficiency, and reproducibility when compared with analogous cells containing PCBM. α-bis-PCBM fills the vacancies and grain boundaries of the perovskite film, enhancing the crystallization of perovskites and addressing the issue of slow electron extraction. In addition, α-bis-PCBM resists the ingression of moisture and passivates voids or pinholes generated in the hole-transporting layer. As a result, a power conversion efficiency (PCE) of 20.8% is obtained, compared with 19.9% by PCBM, and is accompanied by excellent stability under heat and simulated sunlight. The PCE of unsealed devices dropped by less than 10% in ambient air (40% RH) after 44 d at 65 °C, and by 4% after 600 h under continuous full-sun illumination and maximum power point tracking, respectively.

AB - A fullerene derivative (α-bis-PCBM) is purified from an as-produced bis-phenyl-C61-butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and is employed as a templating agent for solution processing of metal halide perovskite films via an antisolvent method. The resulting α-bis-PCBM-containing perovskite solar cells achieve better stability, efficiency, and reproducibility when compared with analogous cells containing PCBM. α-bis-PCBM fills the vacancies and grain boundaries of the perovskite film, enhancing the crystallization of perovskites and addressing the issue of slow electron extraction. In addition, α-bis-PCBM resists the ingression of moisture and passivates voids or pinholes generated in the hole-transporting layer. As a result, a power conversion efficiency (PCE) of 20.8% is obtained, compared with 19.9% by PCBM, and is accompanied by excellent stability under heat and simulated sunlight. The PCE of unsealed devices dropped by less than 10% in ambient air (40% RH) after 44 d at 65 °C, and by 4% after 600 h under continuous full-sun illumination and maximum power point tracking, respectively.

KW - bis-PCBM

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Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability

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Keywords

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